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kaiwinthrop 09-04-2010 11:12 AM

custom Monitor Resolution
Fresh install of Ubuntu 10.04 left me with max 800x600 resolution,
I have tried using xrandr to implement both 1024x768 and the optimal 1440x900 resolutions with the same negative result (see below).

perhaps there is another way?

Monitor: Samsung LN T1954H HDTV
Aspect Ratio 16:9
Screen Size: 19"
Refresh Freq: 60Hz
Resolution: 1440 x 900

Graphics Card:
01:00.0 VGA compatible controller: VIA Technologies, Inc. KM400/KN400/P4M800 [S3 UniChrome] (rev 01)

user@Mojo:~$ cvt 1440 900
# 1440x900 59.89 Hz (CVT 1.30MA) hsync: 55.93 kHz; pclk: 106.50 MHz
Modeline "1440x900_60.00" 106.50 1440 1528 1672 1904 900 903 909 934 -hsync +vsync

user@Mojo:~$ xrandr --newmode "1440x900_60.00" 106.50 1440 1528 1672 1904 900 903 909 934 -hsync +vsync

user@Mojo:~$ xrandr --addmode default 1440x900_60.00

user@Mojo:~$ xrandr --output default --mode 1440x900_60.00
xrandr: Configure crtc 0 failed

hobbestec 09-05-2010 08:06 AM

If you run xrandr without any options does it print out the identifiers for the screens that are connected. It will have a list like:
VGA1 connected 800x600
LVDS1 disconnected
HDMI1 disconnected

You may need to specify the --output using that name instead of default. Something like:
xrandr --output VGA11 --mode 1440x900

Are you in gnome? Have you tried using the gnome monitor preferences gui?

sukujgrg 09-05-2010 09:21 AM

I have managed to change resolutions by editing xorg.conf manually. Are you tried that too?


kaiwinthrop 09-06-2010 05:49 AM

hobbestec, The monitor is specified as "Screen 0" and I have used the syntax as follows:
user@Mojo:~$ xrandr --output screen 0 --mode 1440x900_60.00
to no avail... ill try it again to make sure.

sukujgrg, I think that Ubuntu10.04 has no xorg.conf file, as it was done away with in a previous version but that its possible to create one to use, however, as far as I understand, I would only bother doing that if I was able to get the resolution to change at the command line, and I wanted to make it a permanent fix. Am I wrong?

I will post a couple more of my attempts, but im at work in another town this week, wont be back till Thursday.
thanks all.

hobbestec 09-06-2010 06:42 AM

Below the first line that says Screen 0 there should be further lines that indicate outputs and their status of connected or disconnected along with what resolutions they support.

Ubuntu seems to have a fairly good wiki entry here:

MTK358 09-06-2010 07:17 AM

In his first post, hobbestec meant "post the output of the 'xrandr' command".

kaiwinthrop 09-09-2010 07:44 PM

mojo13@mojo13-desktop:~$ xrandr
Screen 0: minimum 640 x 480, current 800 x 600, maximum 800 x 600
default connected 800x600+0+0 0mm x 0mm
800x600 60.0* 56.0
640x480 60.0

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