Screen resolution problem.

[Achaean]

Hi guys and glad for joining you.
Happy Holiday Season for all!!!


I just installed Kubuntu and I have problem with my screen detection.
I have a Samsung Screenmaster 943SN. Unfortunately, googling for this particular model, revealing that needs tweaking in order to work in Linux (othrwise, I'm fully stasfied from it).

As usual, TFT screens working properly, only at default resolution. Unlike CRTs (where you can choose the mode you prefer), other modes are garbages.
For my screen, the default mode is 1360X768.

My display card is Nvidia Geforce 6150se Nforce 430 (a very common model, which was coming onboard at the time which I bougth my pc).

I installed Kubuntu and Nvidia driver (current + updates).
It couldn't see properly my screen, because it show it as CRT-0 (while it isn't CRT).
The Nvidia control panel allowing me to choose from various modes, with the default one (1360X768) the maximum available.
While the other modes working properly, when choosing the 1360X768, can't see correctly my screen and the K start menu is at the far left, out of the screen and out of my reach of course.
Unfortunately, the other modes (who working properly), are pretty inconvenient.

Is there anything I can do?


Here are, some infos of my system:
Latest stable version Kubuntu x64, fully updated.
Desktop, AMD, No GPU, 1,75GB RAM, 1 HD 1 TB, with some partitions, 1 DVD RAM.


xorg.conf:

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 304.51  (buildd@komainu)  Fri Oct 12 12:53:49 UTC 2012


Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"

    # HorizSync source: builtin, VertRefresh source: builtin
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "CRT-0"
    HorizSync       28.0 - 55.0
    VertRefresh     43.0 - 72.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 6150SE nForce 430"
EndSection

Section "Screen"

# Removed Option "metamodes" "nvidia-auto-select +0+0; 1152x864_60 +0+0"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "CRT-0"
    Option         "metamodes" "1152x864_60 +0+0; nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

xrandr:

Screen 0: minimum 8 x 8, current 1152 x 864, maximum 4096 x 4096
VGA-0 connected 1152x864+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768       60.0 +
   1360x768       60.0     59.8  
   1152x864       60.0* 
   800x600        72.2     60.3     56.2  
   680x384       119.9    119.6  
   640x480        59.9  
   576x432       120.1  
   512x384       120.0  
   400x300       144.4    120.6    112.7  
   320x240       120.1

[oshunluvr]

Try changing

Option "metamodes" "1152x864_60 +0+0; nvidia-auto-select +0+0"

to

Option "metamodes" "1360x768_60 +0+0; nvidia-auto-select +0+0"


Then create a modeline for 1360x768 @ 60hz using "cvt" like this in a terminal: cvt 1360 768 60

Put the results into the monitor section like this:

Modeline "1360x768_60" <CUT AND PASTE FROM cvt OUTPUT>


If you get the same results as before you might have to build your own modeline manually. You might also try using 59.8 htz instead of 60

[Achaean]

Correct!!!
Success!!!

After a lot of trial and error, this online modeline calculator (I found it at Wikipedia): http://www.arachnoid.com/modelines/, gave me the correct values!

xorg.conf:

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 304.51  (buildd@komainu)  Fri Oct 12 12:53:49 UTC 2012


Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"

    # HorizSync source: builtin, VertRefresh source: builtin
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "CRT-0"
    HorizSync       28.0 - 55.0
    VertRefresh     43.0 - 72.0
    ModeLine       "1360x768_60.00" 84.72 1360 1424 1568 1776 768 769 772 795 -hsync +vsync
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 6150SE nForce 430"
EndSection

Section "Screen"

# Removed Option "metamodes" "nvidia-auto-select +0+0; 1152x864_60 +0+0"
# Removed Option "metamodes" "1360x768_59 +0+0; nvidia-auto-select +0+0"
# Removed Option "metamodes" "1360x768_59 +0+0; nvidia-auto-select +0+0"
# Removed Option "metamodes" "1152x864_60 +0+0; nvidia-auto-select +0+0"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "CRT-0"
    Option         "metamodes" "1360x768_60.00 +0+0; nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

xrandr:

Screen 0: minimum 8 x 8, current 1360 x 768, maximum 4096 x 4096
VGA-0 connected 1360x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768       60.0 +
   1360x768       60.0*    60.0     59.8  
   1152x864       60.0  
   800x600        72.2     60.3     56.2  
   680x384       119.9    119.6  
   640x480        59.9  
   576x432       120.1  
   512x384       120.0  
   400x300       144.4    120.6    112.7  
   320x240       120.1

Seems like downgrading a bit the refresh rate to 59.8, solved the problem.
If I put the rate back to 60 (from nvidia control panel), it scrables the screen output again.

PS1: I'll mark this thread SOLVED. If somenthing else is still misiing, please tell me.
PS2: Just a sidequestion, just out of curiousity. Where Krandr is? It isn't installed and I couldn't found it on repositories.
Xrandr, is working just fine of course.

[oshunluvr]

The only thing left would be to set it so it defaults to the correct refresh rate. Assuming the modeline is correct for 59.8, you can force the monitor frequencies with these lines in the monitor section:

Option "UseEDIDFreqs" "false"
HorizSync 31-101
VertRefresh 59.8


This should fix it at 59.8. If this doesn't work, you might try putting the xrandr command that gets you set correctly in /etc/X11/Xsetup. If I'm not mistaken, LightDM (the new default desktop manager) does not load this file by default like KDM did. If you need to use this method, let me know and I'll walk you through it - not too tough to do but I'm not at by Kubuntu box at the moment and I don't want to post it from memory.

As far as Krandr I have no idea!

[Achaean]

The only thing left would be to set it so it defaults to the correct refresh rate. Assuming the modeline is correct for 59.8, you can force the monitor frequencies with these lines in the monitor section:

Option "UseEDIDFreqs" "false"
HorizSync 31-101
VertRefresh 59.8

OK!

I added them to xorg.conf.
xorg.conf:

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 304.51  (buildd@komainu)  Fri Oct 12 12:53:49 UTC 2012


Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"

    # HorizSync source: builtin, VertRefresh source: builtin
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "CRT-0"
    Option "UseEDIDFreqs" "false"
    HorizSync       31 - 101
    VertRefresh     59.8
    ModeLine       "1360x768_60.00" 84.72 1360 1424 1568 1776 768 769 772 795 -hsync +vsync
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 6150SE nForce 430"
EndSection

Section "Screen"

# Removed Option "metamodes" "1152x864_60 +0+0; nvidia-auto-select +0+0"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "CRT-0"
    Option         "metamodes" "1360x768_60.00 +0+0; nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

xrandr:

Screen 0: minimum 8 x 8, current 1360 x 768, maximum 4096 x 4096
VGA-0 connected 1360x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768      120.1 +   60.0  
   2048x1536      60.0  
   1920x1440      60.0  
   1920x1200      60.0  
   1920x1080      59.9  
   1856x1392      60.0  
   1792x1344      60.0  
   1680x1050      60.0     59.9  
   1600x1200      60.0  
   1600x1024      60.2  
   1440x900       59.9  
   1400x1050      60.0  
   1360x768       60.0*    60.0     59.8  
   1280x1024      60.0  
   1280x960       60.0  
   1152x864       60.0  
   960x720       120.0  
   960x600       120.0  
   960x540       120.0  
   928x696       120.1  
   896x672       120.0  
   840x525       120.0    119.8  
   800x600       120.0     60.3  
   800x512       120.3  
   720x450       119.8  
   680x384       119.9    119.6  
   640x512       120.0  
   640x480       120.0     59.9  
   576x432       120.1  
   512x384       120.0  
   400x300       120.6  
   320x240       120.1

Anything else needs to be done?
(I can't figure out, if additional steps are necessary).

[oshunluvr]

I think your modeline is off a bit:

# 1360x768 @ 59.80 Hz (GTF) hsync: 47.54 kHz; pclk: 84.43 MHz
  Modeline "1360x768_59.80"  84.43  1360 1424 1568 1776  768 769 772 795  -HSync +Vsync

[kubicle]

PS2: Just a sidequestion, just out of curiousity. Where Krandr is? It isn't installed and I couldn't found it on repositories.

krandrtray executable is in package 'kde-workspace-bin' (should be installed by default)

[Achaean]

I think your modeline is off a bit:

Can I do something, to fix it?

krandrtray executable is in package 'kde-workspace-bin' (should be installed by default)

THANKS!
Indeed, krandtray is at menus!
Also there are krandrtray.desktop (at usr/share/applications/kde4) and kde-workspace-bin:kde4__krandrtray.desktop (at usr/share/app-instal/desktop).
There's also the main app (not the tray one) randr.desktop (at usr/share/kde4/services).

[oshunluvr]

Just edit the one in your xorg.conf. The example I posted is 1360x768@59.8hz

Also edit the "Option Mode" line to match the name of the mode line.

[Achaean]

Oh, you are right!
I got a bit confused with all these numbers!

OK. Done!

Here's the new xorg.conf:

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 304.51  (buildd@komainu)  Fri Oct 12 12:53:49 UTC 2012


Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"

    # HorizSync source: builtin, VertRefresh source: builtin
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "CRT-0"
    Option "UseEDIDFreqs" "false"
    HorizSync       31 - 101
    VertRefresh     59.8
    ModeLine       "1360x768_59.80" 84.43 1360 1424 1568 1776 768 769 772 795 -hsync +vsync
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 6150SE nForce 430"
EndSection

Section "Screen"

# Removed Option "metamodes" "1152x864_60 +0+0; nvidia-auto-select +0+0"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "CRT-0"
    Option         "metamodes" "1360x768_59.80 +0+0; nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

I think it's OK now.

[Achaean]

Again, THANKS A MILLION and
HAPPY NEW YEAR for everyone!!!

[oshunluvr]

Glad you got it worked out and Happy New Year to you too.