1680 x 1050 screen resolution

[mfg]

problem: 1680 x 1050 resolution cannot be obtained.

system: kubuntu dapper drake installed on
dell laptop inspiron 6400 with WXVGA 1680 x 1050 resolution.
computer has intel 945 graphics card.

trials to solve the problem:

system settings detects vesa driver + plug and play monitor
request to install intel 945 (810i driver) + dell 1680x1050 laptop display panel (16/10) allows maximum resolution of 1280x1024.

If monitor option "widescreen" is set, the 1680x1050 resolution appears in menu but upon xrestart the resolution is very low.

The 915resolution package does not solve the problem. The options list does not have 1680x1024 resolution (the closest match is 1600x1200). But even in this case, the resolution is not obtained.

Running sudo dpkg-reconfigure -phigh xserver-xorg does not solve the problem either.

may I thank any help in advance

manuel

[askrieger]

Re: 1680 x 1050 screen resolution

I suggest manually editing the /etc/X11/xorg.conf (either "sudo nano /etc/X11/xorg.conf" from a konsole, or "right click on the desktop and enter command "kdesu kate /etc/X11/xorg.conf". In either case, set you horizontal sync rate to whatever range your laptop can handle and your vertical refresh rate to 50 or 60 Hz (your line frequency), then remove all screen size entries in each display subsection except "1680 x 1050". This guarantees that you'll get the appropriate screen size albeit perhaps only with 16 bit color.

[mfg]

Re: 1680 x 1050 screen resolution PROBLEM SOLVED

solution: correct 1680x1050 resolution obtained
dapper drake kubuntu on dell inspiron 6400 WSXGA+.

procedure

install 915 resolution via adept manager
mimic the procedure decribed in
https://wiki.ubuntu.com/i915Driver

run "sudo 915resolution -l"
Pickup an unused resolution ('4d' for me)
run "sudo 915resolution 4d 1650 1050 32"

Edit /etc/X11/xorg.conf
(a nice way of doing it is with konqueror on file xorg.conf right click and select "actions" and the "edit as root")

add in the section:
Section "Device"
identifier "Intel Corporation Mobile Integrated Graphics Controller"

add the following line:

Option "ForceBIOS" "1920x1440=1680x1050"

and in the section:
Section "Monitor"
  identifier "Generic Monitor"

add the following lines:

  modeline  "1680x1050@60" 147.14 1680 1784 1968 2256 1050 1051 1054 1087 -hsync +vsync
  modeline  "1680x1050@75" 188.07 1680 1800 1984 2288 1050 1051 1054 1096 -hsync +vsync

add to /etc/init.d/bootmisc.sh, before the last line ": exit 0"
/usr/sbin/915resolution 4d 1680 1050 32

add to /etc/default/915resolution

MODE=4d
# and set resolutions for the mode.
XRESO=1680
YRESO=1050

restart the computer and it should work.

Do not modify the display with System Settings because it will replace the xorg.conf file modified above.

[Stephen47]

Re: 1680 x 1050 screen resolution

I have this same computer (Inspiron 6400). I followed all the steps in this thread and after I rebooted I didn't have a gui I just had the command line. I am actually running Ubuntu but I assumed the changes would be the same. I am very new to ubuntu. I have done this to myself several times while trying various things to get the resolution to display at 1680x1050 so I just re-edit the file back to what it was and I have a gui again. Obviously I did something wrong. I would very much like to get this issue resolved so I would appreciate any helpful hints. Thanks.

[subinp]

Re: 1680 x 1050 screen resolution

try

sudo dpkg-reconfigure xserver-xorg

from your command line. Answer the question correctly when prompted. Restart you machine.

It should set you display right. At least it did for me. (Courtesy Shirshasin)