[CentOS] X/Display resolution configuration

Mon Oct 8 20:54:19 UTC 2012
Mike Watson <mikew at crucis.net>

Here's the output of "xrandr."  My Xorg.0.log does not exist.

Screen 0: minimum 320 x 200, current 1600 x 900, maximum 8192 x 8192
VGA1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 
440mm x 250mm
    1600x900       60.0*+
    1280x1024      75.0     60.0
    1280x960       60.0
    1280x800       59.8
    1152x864       75.0
    1280x720       60.0
    1024x768       75.1     70.1     60.0
    832x624        74.6
    800x600        72.2     75.0     60.3     56.2
    640x480        72.8     75.0     66.7     60.0
    720x400        70.1
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)

My system will run the 1600x900       60.0*+ selection if I choose it at 
login. Otherwise it reverts to a lower selection 1280x1024.



"Lose not thy airspeed, lest the ground rises up and smites thee."
   -- William Kershner

On 10/08/2012 01:21 PM, Marko Vojinovic wrote:
> On Monday, 8. October 2012. 12.52.18 Mike Watson wrote:
>> On 10/08/2012 12:38 PM, Nux! wrote:
>>> On 08.10.2012 18:20, Mike Watson wrote:
>>>> I've installed CentOS 6.3 on a new system. I've a nagging problem
>>>> that
>>>> I'm trying to fix---the screen resolution changes. I've a flat screen
>>>> monitor that has 1600x900 capability. However when I logout and then
>>>> log
>>>> back in the resolution changes to 1280x1024.  When I looked at the
>>>> xorg.conf.d directory it was empty---both in /etc and in /usr/share.
>>>> Where is xorg.conf and it's monitor section now? BTW, I'm use KDE.
>>> On Gnome you would use gnome-display-properties to set the resolution.
>>> Not sure if it works on KDE though.
>> Tried that. It's present in KDE, too. I've set it numerous times but the
>> next time I logout and back in, the resolution drops to a lower density.
>> Where is this value stored in 6.3. My previous box, Fedora 7 used Xorg
>> but I can't find the Xorg.conf file for 6.3. All I've found so far is an
>> empty directory.
> KDE/Gnome is irrelevant, the monitor resolution is controlled by X. The proper
> way to troubleshoot these issues is to provide us with the output of "xrandr",
> and the complete log file /var/log/Xorg.0.log, for both the correct- and wrong-
> resolution sessions. It is possible that your monitor is not providing the
> correct EDID data, or you have two monitors plugged in at the same time, or
> something similar. Please provide the logs and describe your setup (graphics
> card, video driver, number of monitors, etc.), and then we should be able to
> tell you what is going on and why.
> As for the xorg.conf file, it does not exist anymore by default, unless you
> create one yourself. The proper path is /etc/X11/xorg.conf . Write the part of
> configuration that you need customized (other stuff you can leave to be
> autodetected).
> HTH, :-)
> Marko
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