On Tue, Mar 09, 2004 at 07:05:52PM -0500, Ken Chamberlain wrote:
> My monitor died today. :(
>
> I plugged in an old 14"er that was sitting around, but it doesn't have
> the capabilities of the other monitor. How can I configure GDM for a
> different monitor? The graphical display was unreadable. I was able to
> CNTL-ALT-F3 and login to a text based display and switch to "init 3"
> mode so that GDM and X and all the graphical tasks are not running. Now
> I would like to get graphical mode working with the new monitor. In
> case the broken monitor is repairable, is there configuration files I
> can backup to make falling back to the current configuration easier?
Check /etc/X11/XF86Config
Back up this file
cp /etc/X11/XF86Config /etc/X11/XF86Config-Ken-Backup
There should be a "Section Monitor" line that marks
a section describing your current monitor. See also
Section "Device"...
You can modify this stuff to reflect you new Monitor. There are
multiple ways to limit X drivers so Max Resolution and HorizSync
VertRefresh may need to change. Be conservative with H Freq/ V Freq
numbers... this is one place where you can hurt hardware.
Section "Monitor"
#Identifier "WCT21"
#VendorName "Monitor Vendor"
# from MonitorWorld.com
# Model: WCT21
# Max Resolution: 1600 x 1200
# Sync Type: Composite, Seperate
# H Freq/ V Freq: 30-96khz / 48-160hz
# Tube Manufacturer: Sony
# Monitor Type: Multi_Frequency
# Connector: 13W3/HD15
Identifier "Monitor1"
ModelName "WAyCoolTube10004"
HorizSync 30.0 - 96.0
VertRefresh 48.0 - 160.0
EndSection
And in the section
Section "Device"
Look for a line
Modes "1280x1024" "1280x960" "1152x864"....
Perhaps you list a mode results in a frequency that the tube cannot
display.
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