Announcement

**oshunluvr** · Sep 01, 2015, 12:09 PM

I can't say why what you've tried isn't working. You'd have to provide a lot more detail to sort this one out.

However, I can say that I boot to multiple installs on the same btrfs filesystem everyday with no problems - that's right, only one btrfs filesystem. Since I'm using a multiple device btrfs filesystem, I have to have a separate boot partition. I use a dedicated grub partition instead of multiple boot partitions.

Here's my setup:

1) Separate grub partition for boot purposes only. It contains only the necessary files to boot (contents of /boot/grub and memtest). I use a boot.cfg that contains the menu entry for memtest and then has a menu entry for each btrfs install. Here's what they look like:

Code:

menuentry 'Kubuntu 14.04' {
insmod gzi0
insmod btrfs
search --no-floppy --fs-uuid --set=root 8f0c1661-4e84-4512-b875-23bcfd5be1d8
configfile /@Kubuntu_14_04/boot/grub/grub.cfg
}

As you can see in this example, these menu entries only point to the regular grub.cfg that's included with each install.

2) Do one install at a time using the btrfs filesystem (partition) without formatting it. The default Kubuntu install will automatically use subvolumes for root (@) and home (@home).

3) As you do each install, before rebooting, rename the subvolumes from the defaults to something unique. Since I typically have one install of each release of Kubuntu for example, I use @Kubuntu_14.04 and @Kubuntu_14.04_home instead of @ and @home. You could use anything you want. Then you must edit /etc/fstab to use the new subvolume names like this:

Code:

UUID=8f0c1661-4e84-4512-b875-23bcfd5be1d8 /               btrfs   rw,relatime,space_cache,compress=lzo,ssd,subvol=[B]@Kubuntu_14_04 [/B]0 1
UUID=8f0c1661-4e84-4512-b875-23bcfd5be1d8 /home           btrfs   rw,relatime,space_cache,compress=lzo,ssd,subvol=[B]@Kubuntu_14_04_home[/B] 0 2

and edit the /boot/grub/grub.cfg (the one within the install subvolume) to show the new subvolume names also. You will need to do this only once per install. After it boots, any future grub updates will correctly use the subvolume names automatically. You need only edit the main menu entry if you like, but run update-grub after you boot into it to correct all the other entries.

4) Finally, edit the /boot/grub.cfg and add a menu entry that points to the new install's /boot/grub/grub.cfg. I also disable the grub os-prober and memtest search in each install (greatly speeds up update-grub).

The reasons I do it this way are:
1) Only one btrfs partition needed.
2) No more watching os-prober search and fail looking for other installs and only one memtest installed (one is plenty).
3) No matter how bad I bork an install, the machine still boots (just pick another install at boot time).

I set the grub time-outs for menu selection to 3 seconds each so it still boots quickly even if I don't hit ENTER during the menu display.

If you want to keep your current setup, why not boot the the main install you want to use and add the above custom menu entry (edited for your UUID and subvolumes obviously) to 40_custom and then boot to your hearts content? You could even add a 40_custom to both installs, allowing each grub to boot to the other if you change your mind mid-grub...

**SimonAndric** · Sep 01, 2015, 04:23 PM

hello!

first let me say thank you for such an awesome reply... really thank you.... if it helps, here are a few more details about my setup:

sudo blkid
/dev/sda1: UUID="d2ad0990-78e3-464e-8ac9-1dc67be49963" TYPE="swap"
/dev/sda5: LABEL="disk" UUID="78859834-14f6-492a-9360-c19f94f4d824" UUID_SUB="84dcf250-8523-49d9-a289-cc71804b6c44" TYPE="btrfs"
/dev/sda6: LABEL="plasma5_boot" UUID="209e0843-4c14-4984-bd3b-4d93bf5cda16" TYPE="ext4"
/dev/sda7: LABEL="plasma5" UUID="33670289-7878-44c9-96f5-252c17a15ff5" UUID_SUB="addf1900-17b3-42db-89b0-c5add521bfe2" TYPE="btrfs"
/dev/sda8: LABEL="kde4_boot" UUID="58ffc14b-8e41-4099-9589-bbf15d34f96a" TYPE="ext4"
/dev/sda9: LABEL="kde4" UUID="5383a199-593f-421a-b850-3ec6d662ff87" UUID_SUB="737d29cf-0a20-456c-bfd3-6f381dae955b" TYPE="btrfs"

/dev/sda1 = swap
/dev/sda5 = my disk with data (btrfs)

/dev/sda6 = only "/boot" of plasma5 (ext4)
/dev/sda7 = (the rest of) plasma5 (btrfs)

/dev/sda8 = only "/boot" of my kubuntu trusty kde4 (ext4)
/dev/sda9 = (the rest of) kde4 (btrfs)

---------------------

grub.cfg on /dev/sda6 (plasma5)

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
set default="0"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi

function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}

if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_msdos
insmod btrfs
set root='hd0,msdos8'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 33670289-7878-44c9-96f5-252c17a15ff5
else
search --no-floppy --fs-uuid --set=root 33670289-7878-44c9-96f5-252c17a15ff5
fi
font="/@/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=sl_SI
insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
set timeout=30
else
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=hidden
set timeout=0
# Fallback hidden-timeout code in case the timeout_style feature is
# unavailable.
elif sleep --interruptible 0 ; then
set timeout=0
fi
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
#set_background_image "images/tile.png";

set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
if background_color 0,0,0; then
clear
fi
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
set gfxpayload="${1}"
if [ "${1}" = "keep" ]; then
set vt_handoff=vt.handoff=7
else
set vt_handoff=
fi
}
if [ "${recordfail}" != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-33670289-7878-44c9-96f5-252c17a15ff5' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 209e0843-4c14-4984-bd3b-4d93bf5cda16
else
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
fi
linux /vmlinuz-4.1.0-3-generic root=UUID=33670289-7878-44c9-96f5-252c17a15ff5 ro rootflags=subvol=@ quiet splash $vt_handoff
initrd /initrd.img-4.1.0-3-generic
}
submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-33670289-7878-44c9-96f5-252c17a15ff5' {
menuentry 'Ubuntu, with Linux 4.1.0-3-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.1.0-3-generic-advanced-33670289-7878-44c9-96f5-252c17a15ff5' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 209e0843-4c14-4984-bd3b-4d93bf5cda16
else
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
fi
echo 'Loading Linux 4.1.0-3-generic ...'
linux /vmlinuz-4.1.0-3-generic root=UUID=33670289-7878-44c9-96f5-252c17a15ff5 ro rootflags=subvol=@ quiet splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /initrd.img-4.1.0-3-generic
}
menuentry 'Ubuntu, with Linux 4.1.0-3-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.1.0-3-generic-recovery-33670289-7878-44c9-96f5-252c17a15ff5' {
recordfail
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 209e0843-4c14-4984-bd3b-4d93bf5cda16
else
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
fi
echo 'Loading Linux 4.1.0-3-generic ...'
linux /vmlinuz-4.1.0-3-generic root=UUID=33670289-7878-44c9-96f5-252c17a15ff5 ro recovery nomodeset rootflags=subvol=@
echo 'Loading initial ramdisk ...'
initrd /initrd.img-4.1.0-3-generic
}
menuentry 'Ubuntu, with Linux 4.1.0-2-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.1.0-2-generic-advanced-33670289-7878-44c9-96f5-252c17a15ff5' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 209e0843-4c14-4984-bd3b-4d93bf5cda16
else
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
fi
echo 'Loading Linux 4.1.0-2-generic ...'
linux /vmlinuz-4.1.0-2-generic root=UUID=33670289-7878-44c9-96f5-252c17a15ff5 ro rootflags=subvol=@ quiet splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /initrd.img-4.1.0-2-generic
}
menuentry 'Ubuntu, with Linux 4.1.0-2-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.1.0-2-generic-recovery-33670289-7878-44c9-96f5-252c17a15ff5' {
recordfail
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 209e0843-4c14-4984-bd3b-4d93bf5cda16
else
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
fi
echo 'Loading Linux 4.1.0-2-generic ...'
linux /vmlinuz-4.1.0-2-generic root=UUID=33670289-7878-44c9-96f5-252c17a15ff5 ro recovery nomodeset rootflags=subvol=@
echo 'Loading initial ramdisk ...'
initrd /initrd.img-4.1.0-2-generic
}
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry 'Memory test (memtest86+)' {
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 209e0843-4c14-4984-bd3b-4d93bf5cda16
else
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
fi
knetbsd /memtest86+.elf
}
menuentry 'Memory test (memtest86+, serial console 115200)' {
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 209e0843-4c14-4984-bd3b-4d93bf5cda16
else
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
fi
linux16 /memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/30_uefi-firmware ###
### END /etc/grub.d/30_uefi-firmware ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###

-------------------------------

grub.cfg on /dev/sda8 (kde4)

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
set default="0"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi

function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}

if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_msdos
insmod btrfs
set root='hd0,msdos9'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos9 --hint-efi=hd0,msdos9 --hint-baremetal=ahci0,msdos9 5383a199-593f-421a-b850-3ec6d662ff87
else
search --no-floppy --fs-uuid --set=root 5383a199-593f-421a-b850-3ec6d662ff87
fi
font="/@/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=sl_SI
insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
set timeout=30
else
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=hidden
set timeout=0
# Fallback hidden-timeout code in case the timeout_style feature is
# unavailable.
elif sleep --interruptible 0 ; then
set timeout=0
fi
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
#set_background_image "images/tile.png";

set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
if background_color 0,0,0; then
clear
fi
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
set gfxpayload="${1}"
if [ "${1}" = "keep" ]; then
set vt_handoff=vt.handoff=7
else
set vt_handoff=
fi
}
if [ "${recordfail}" != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-5383a199-593f-421a-b850-3ec6d662ff87' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos8'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 58ffc14b-8e41-4099-9589-bbf15d34f96a
else
search --no-floppy --fs-uuid --set=root 58ffc14b-8e41-4099-9589-bbf15d34f96a
fi
linux /vmlinuz-3.19.0-27-generic root=UUID=5383a199-593f-421a-b850-3ec6d662ff87 ro rootflags=subvol=@ quiet splash $vt_handoff
initrd /initrd.img-3.19.0-27-generic
}
submenu 'Napredne možnosti za Ubuntu' $menuentry_id_option 'gnulinux-advanced-5383a199-593f-421a-b850-3ec6d662ff87' {
menuentry 'Ubuntu, z Linuxom 3.19.0-27-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-27-generic-advanced-5383a199-593f-421a-b850-3ec6d662ff87' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos8'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 58ffc14b-8e41-4099-9589-bbf15d34f96a
else
search --no-floppy --fs-uuid --set=root 58ffc14b-8e41-4099-9589-bbf15d34f96a
fi
echo 'Nalaganje Linuxa 3.19.0-27-generic ...'
linux /vmlinuz-3.19.0-27-generic root=UUID=5383a199-593f-421a-b850-3ec6d662ff87 ro rootflags=subvol=@ quiet splash $vt_handoff
echo 'Nalaganje začetnega ramdiska ...'
initrd /initrd.img-3.19.0-27-generic
}
menuentry 'Ubuntu, with Linux 3.19.0-27-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-27-generic-recovery-5383a199-593f-421a-b850-3ec6d662ff87' {
recordfail
load_video
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos8'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 58ffc14b-8e41-4099-9589-bbf15d34f96a
else
search --no-floppy --fs-uuid --set=root 58ffc14b-8e41-4099-9589-bbf15d34f96a
fi
echo 'Nalaganje Linuxa 3.19.0-27-generic ...'
linux /vmlinuz-3.19.0-27-generic root=UUID=5383a199-593f-421a-b850-3ec6d662ff87 ro recovery nomodeset rootflags=subvol=@
echo 'Nalaganje začetnega ramdiska ...'
initrd /initrd.img-3.19.0-27-generic
}
menuentry 'Ubuntu, z Linuxom 3.19.0-26-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-26-generic-advanced-5383a199-593f-421a-b850-3ec6d662ff87' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos8'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 58ffc14b-8e41-4099-9589-bbf15d34f96a
else
search --no-floppy --fs-uuid --set=root 58ffc14b-8e41-4099-9589-bbf15d34f96a
fi
echo 'Nalaganje Linuxa 3.19.0-26-generic ...'
linux /vmlinuz-3.19.0-26-generic root=UUID=5383a199-593f-421a-b850-3ec6d662ff87 ro rootflags=subvol=@ quiet splash $vt_handoff
echo 'Nalaganje začetnega ramdiska ...'
initrd /initrd.img-3.19.0-26-generic
}
menuentry 'Ubuntu, with Linux 3.19.0-26-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-26-generic-recovery-5383a199-593f-421a-b850-3ec6d662ff87' {
recordfail
load_video
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos8'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 58ffc14b-8e41-4099-9589-bbf15d34f96a
else
search --no-floppy --fs-uuid --set=root 58ffc14b-8e41-4099-9589-bbf15d34f96a
fi
echo 'Nalaganje Linuxa 3.19.0-26-generic ...'
linux /vmlinuz-3.19.0-26-generic root=UUID=5383a199-593f-421a-b850-3ec6d662ff87 ro recovery nomodeset rootflags=subvol=@
echo 'Nalaganje začetnega ramdiska ...'
initrd /initrd.img-3.19.0-26-generic
}
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry 'Memory test (memtest86+)' {
insmod part_msdos
insmod ext2
set root='hd0,msdos8'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 58ffc14b-8e41-4099-9589-bbf15d34f96a
else
search --no-floppy --fs-uuid --set=root 58ffc14b-8e41-4099-9589-bbf15d34f96a
fi
knetbsd /memtest86+.elf
}
menuentry 'Memory test (memtest86+, serial console 115200)' {
insmod part_msdos
insmod ext2
set root='hd0,msdos8'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 58ffc14b-8e41-4099-9589-bbf15d34f96a
else
search --no-floppy --fs-uuid --set=root 58ffc14b-8e41-4099-9589-bbf15d34f96a
fi
linux16 /memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/30_uefi-firmware ###
### END /etc/grub.d/30_uefi-firmware ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.

menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-33670289-7878-44c9-96f5-252c17a15ff5' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 209e0843-4c14-4984-bd3b-4d93bf5cda16
else
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
fi
linux /vmlinuz-4.1.0-3-generic root=UUID=33670289-7878-44c9-96f5-252c17a15ff5 ro rootflags=subvol=@ quiet splash $vt_handoff
initrd /initrd.img-4.1.0-3-generic
}
submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-33670289-7878-44c9-96f5-252c17a15ff5' {
menuentry 'Ubuntu, with Linux 4.1.0-3-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.1.0-3-generic-advanced-33670289-7878-44c9-96f5-252c17a15ff5' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 209e0843-4c14-4984-bd3b-4d93bf5cda16
else
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
fi
echo 'Loading Linux 4.1.0-3-generic ...'
linux /vmlinuz-4.1.0-3-generic root=UUID=33670289-7878-44c9-96f5-252c17a15ff5 ro rootflags=subvol=@ quiet splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /initrd.img-4.1.0-3-generic
}
menuentry 'Ubuntu, with Linux 4.1.0-3-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.1.0-3-generic-recovery-33670289-7878-44c9-96f5-252c17a15ff5' {
recordfail
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 209e0843-4c14-4984-bd3b-4d93bf5cda16
else
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
fi
echo 'Loading Linux 4.1.0-3-generic ...'
linux /vmlinuz-4.1.0-3-generic root=UUID=33670289-7878-44c9-96f5-252c17a15ff5 ro recovery nomodeset rootflags=subvol=@
echo 'Loading initial ramdisk ...'
initrd /initrd.img-4.1.0-3-generic
}
menuentry 'Ubuntu, with Linux 4.1.0-2-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.1.0-2-generic-advanced-33670289-7878-44c9-96f5-252c17a15ff5' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 209e0843-4c14-4984-bd3b-4d93bf5cda16
else
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
fi
echo 'Loading Linux 4.1.0-2-generic ...'
linux /vmlinuz-4.1.0-2-generic root=UUID=33670289-7878-44c9-96f5-252c17a15ff5 ro rootflags=subvol=@ quiet splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /initrd.img-4.1.0-2-generic
}
menuentry 'Ubuntu, with Linux 4.1.0-2-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.1.0-2-generic-recovery-33670289-7878-44c9-96f5-252c17a15ff5' {
recordfail
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd0,msdos7'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 209e0843-4c14-4984-bd3b-4d93bf5cda16
else
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
fi
echo 'Loading Linux 4.1.0-2-generic ...'
linux /vmlinuz-4.1.0-2-generic root=UUID=33670289-7878-44c9-96f5-252c17a15ff5 ro recovery nomodeset rootflags=subvol=@
echo 'Loading initial ramdisk ...'
initrd /initrd.img-4.1.0-2-generic
}
}

### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###

----------------------------------

lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 465,8G 0 disk
├─sda1 8:1 0 1,9G 0 part [SWAP]
├─sda2 8:2 0 1K 0 part
├─sda5 8:5 0 370,8G 0 part
├─sda6 8:6 0 476M 0 part /media/original/plasma5_bootroot
├─sda7 8:7 0 18,2G 0 part
├─sda8 8:8 0 476M 0 part /boot
└─sda9 8:9 0 74G 0 part
sr0 11:0 1 1024M 0 rom

-------

i can provide more data, if you like, just tell me what more is needed...

nice day!

and thank you again...

Symon

**SimonAndric** · Sep 01, 2015, 04:27 PM

also:

fstab of plasma5 system:

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda8 during installation
UUID=33670289-7878-44c9-96f5-252c17a15ff5 / btrfs defaults,subvol=@ 0 1
# /boot was on /dev/sda7 during installation
UUID=209e0843-4c14-4984-bd3b-4d93bf5cda16 /boot ext4 defaults 0 2
# /home was on /dev/sda8 during installation
UUID=33670289-7878-44c9-96f5-252c17a15ff5 /home btrfs defaults,subvol=@home 0 2
# swap was on /dev/sda1 during installation
UUID=d2ad0990-78e3-464e-8ac9-1dc67be49963 none swap sw 0 0

# kde4 on /dev/sda6
LABEL=kde4 /media/original/kde4root/ btrfs defaults 0 1
/media/original/kde4root/@/ /media/fani/kde4/ none bind 0 0

# plasma5 on /dev/sda5
LABEL=plasma5 /media/original/plasma5root/ btrfs defaults 0 1
/media/original/plasma5root/@/ /media/fani/plasma5/ none bind 0 0

# disk on /dev/sda5 --- was "ext4 errors=remount-ro 0 1"
LABEL=disk /media/original/diskroot/ btrfs defaults 0 1
/media/original/diskroot/disk/ /media/fani/disk/ none bind 0 0

------------------------------

fstab of kde4 system:

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda9 during installation
UUID=5383a199-593f-421a-b850-3ec6d662ff87 / btrfs defaults,subvol=@ 0 1
# /boot was on /dev/sda8 during installation
UUID=58ffc14b-8e41-4099-9589-bbf15d34f96a /boot ext4 defaults 0 2
# /home was on /dev/sda9 during installation
UUID=5383a199-593f-421a-b850-3ec6d662ff87 /home btrfs defaults,subvol=@home 0 2
# swap was on /dev/sda1 during installation
UUID=d2ad0990-78e3-464e-8ac9-1dc67be49963 none swap sw 0 0
/dev/sdb /media/floppy0 auto rw,user,noauto,exec,utf8 0 0

# plasma5 on /dev/sda7
LABEL=plasma5 /media/original/plasma5root/ btrfs defaults 0 1
/media/original/plasma5root/@/ /media/fani/plasma5/ none bind 0 0

# disk on /dev/sda5
LABEL=disk /media/original/diskroot/ btrfs defaults 0 1
/media/original/diskroot/disk/ /media/fani/disk/ none bind 0 0

# plasma5_boot on /dev/sda6
LABEL=plasma5_boot /media/original/plasma5_bootroot/ ext4 defaults 0 2
/media/original/plasma5_bootroot/ /media/fani/plasma5_boot/ none bind 0 0

**oshunluvr** · Sep 02, 2015, 06:40 AM

First off; the next time you need to post long files or lists use the CODE (#) or QUOTE tags (they're at the right end of the format bar just above your posting window). This will put whatever text inside a scroll box, making the entire post way more readable. The post two above is so long it's hard to tell where you commented and where your file contents begin or end.

So, back to your issue. Am I correct in stating what you are having difficultly with is booting plasma5 from the kde4 GRUB and vice versa?

If this is so, and you're booting to kde4 right now, try this:

Edit /etc/grub.d/40_custom and add these lines at the end of the file (below the "exec" line)

Code:

menuentry 'Plasma5' {
[COLOR=#3E3E3E]insmod part_msdos[/COLOR]
insmod ext2
search --no-floppy --fs-uuid --set=root [COLOR=#333333]209e0843-4c14-4984-bd3b-4d93bf5cda16[/COLOR]
configfile /boot/grub/grub.cfg
}

Then run update-grub and reboot. This should (assuming my entry is correct) put a menu entry at the bottom of the GRUB menu for Plasma5 and you should be able to select it. When you do, it will not boot right away, rather it will display another GRUB menu - the one from Plasma5. At this point, either hit ENTER (booting Plasma5) or ESC to return to the kde4 GRUB boot menu.

This should allow you to boot either install. If not, report back your errors and we'll continue working on it.

Another way to do this would be to mount the plasma5_boot partition and copy the plasma5 boot menu entry from grub.cfg there and put that into 40_custom in kde4. Then you could boot it directly (no second menu). However, the problem with this method is when you update the plasma5 kernel, you would have to re-edit 40_custom again.

The advantage to the dual grub menu set up is both installs update their own grub menus automatically.

**SimonAndric** · Sep 02, 2015, 02:38 PM

hello!

first thank you for you kind reply..also i appologize for not using "code" barackets, yes you are right i will from now one use it, thank you for pointing them out to me...

Am... ok, so i put the lines at the end of

/etc/grub.d/40_custom

it looks now like this:

Code:

#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.

menuentry 'Plasma5' {
insmod part_msdos
insmod ext2
search --no-floppy --fs-uuid --set=root 209e0843-4c14-4984-bd3b-4d93bf5cda16
configfile /boot/grub/grub.cfg
}

but he command update_grub still results in:

Code:

fani@avatar:~$ sudo update-grub
[sudo] password for fani: 
Generating grub configuration file ...
Opozorilo: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
Najden je bil odtis linux: /boot/vmlinuz-3.19.0-27-generic
Najden je bil odtis initrd: /boot/initrd.img-3.19.0-27-generic
Najden je bil odtis linux: /boot/vmlinuz-3.19.0-26-generic
Najden je bil odtis initrd: /boot/initrd.img-3.19.0-26-generic
Found memtest86+ image: /memtest86+.elf
Found memtest86+ image: /memtest86+.bin
narejeno

on fortunately

still no "plasma5" menu entry...

but thank you nevertheless...

nice day

Simon

**oshunluvr** · Sep 02, 2015, 02:52 PM

Odd, as it works here just as I typed it above. I even tested it to be sure.

Is your 40_custom file executable? It should look like:

ll /etc/grub.d/40_custom

Code:

[B]-rwxr-xr-x[/B] 1 root root 12261 Jan 28  2015 40_custom

Also, please post the output of:

cat /boot/grub/grub.cfg |grep Plasma5

**oshunluvr** · Sep 02, 2015, 02:52 PM

BTW, the custom entries do not show up the the output of update-grub. You have to look in the grub.cfg or reboot.

**SimonAndric** · Sep 02, 2015, 02:56 PM

Code:

fani@avatar:~$ ll /etc/grub.d/40_custom
-rwxr-xr-x 1 root root 378 sep  2 22:34 /etc/grub.d/40_custom*


fani@avatar:~$ cat /boot/grub/grub.cfg |grep Plasma5
menuentry 'Plasma5' {
fani@avatar:~$

ok i will reboot and post back if the grub menu showed up /and/or if it contained Plasma5 :-)

thank you!

s.

**SimonAndric** · Sep 02, 2015, 03:36 PM

hello!

ok so i rebooted and..wel..i thought that if you add an manual entry /or/ there are at least two different systems installed on a computer the grub menu will show itself automatically... this was not the case... when i came to login screen i again restarted, this time pressing left and/or right shift buttons on keyboard and the menu still didnt come...with next reboot i tried holding shift buttons... first both,..then only left...then only right... ..then i tried (of course one example per reboot) to press both buttons sequentially (left, right, left, right,...) right fro mthe get go - so from bios menu on... no avail....

alas i cannot access the grub menu... i feel such a n00b :-/ so maybe the entry is there but i cannot access it... is there another way to..persuade the grub menu to show itself after the bios ? or maybe im doing someting wrong?

thank you!

nice day

Simon

**vinnywright** · Sep 02, 2015, 03:54 PM

it is the left shift button ,,,,,,you must hit it as soon as you power on rite after the post screen but befor it starts to boot (a very short window) start tapping it as soon as the power comes on

VINNY

**oshunluvr** · Sep 03, 2015, 07:36 AM

You can display the grub menu (you'll want to if you're dual booting) by editing /etc/default/grub thusly:

Code:

GRUB_DEFAULT=0
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=3

Edit the above 4 lines to look like this. The GRUB_TIMEOUT=3 means 3 seconds of menu, which I think is plenty because you only need hit any key and the timer stops leaving the menu indefinitely. However, you can always choose a different amount.

And - as always - you must run update-grub for the changes to take effect.

One last thing: everyone here was a n00b once.

**SimonAndric** · Sep 04, 2015, 12:32 PM

Hello!

thank you - now it works - at least going to grub menu... if i now keep pressing LEFt shift button the grub menu appears and in it IS the "plasma5" menu entry! yay....

but... when i click on it, the grub menu reappears almost instantly - the menu itself kinda "blinks" - and im back in the menu... ...... it means whatever is writen in "40_custom" does NOT mount &start the plasma 5 system...

help....

thank you!

kind regards

Simon

**oshunluvr** · Sep 04, 2015, 12:57 PM

The 40_custom entry I gave you won't start Plasma5. It's supposed to load a second boot menu for Plasma5. Does the menu change when you select the Plasma5 entry or does it re-load the same menu? The grub.cfg location might be wrong.

You need to mount the Plasma5_boot partition and see what the path is to grub.cfg. I might just be /grub/grub.cfg instead of /boot/grub/grub.cfg.

**SimonAndric** · Sep 05, 2015, 05:56 AM

hello!

on fortunatelly it boots in the same grub menu - first of all all entries are the same (including "plasma5" ) and second - the version number of linux kernel are the same (even though plasma 5 is using 4.1 or 4.3 something and my trusty i think 3.9. sth)

ok i will check the path ..although i think both grub.cfg are in /boot/grub.cfg ... but i will check....

i will post back...

thank you!

simon

Announcement

[PLASMA 5] / [KDE4] - i have 2 kubuntu btrfs installations ...i cannot boot info both

[SOLVED] [PLASMA 5] / [KDE4] - i have 2 kubuntu btrfs installations ...i cannot boot info both

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