On 2014-10-31 12:25, Tom Horsley wrote:
On Fri, 31 Oct 2014 11:49:38 -0700
Rick Stevens wrote:
One way out is to plug the monitor into the box directly, boot up and
verify that the screen comes up correctly. You can then get X to dump
its settings and put those into an Xorg.conf file so it always uses
those values. It won't matter then what the KVM spews out since X will
use the information from the conf file.
That works up to the point where you try to modify the xorg.conf
file. X pays no attention to xorg.conf most of the time these
days. What does work is getting the EDID from the monitor and
stashing it in a firmware directory where you can use it to
force the kernel to override EDID any time anyone asks about it.
Get edid from currently connected monitor:
monitor-get-edid > /lib/firmware/edid.bin
Stick this on kernel options in grub config file:
drm_kms_helper.edid_firmware=edid.bin
Now the dadgum kernel will boot with the edid for the
monitor even if it isn't connected at boot time.
Works fine until you hook up a monitor the XOrg stuff does not understand. The
EDID is passed through on my systems. It is not interpreted properly by default
on most systems, including Windows and 'ix. So I had to hand create the
configuration parameters.
I had to build an xorg.conf file with things like these in it:
Section "Monitor"
Identifier "Monitor0"
ModelName "Gateway LCD"
HorizSync 30.0 - 74.6
VertRefresh 60.0 - 60.0
Modeline "1920x1200" 193.16 1920 2048 2256 2592 1200 1201 1204 1242
-HSync +Vsync
Option "dpms"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Modes "1920x1200" "1680x1050" "1600x1024" "1600x1200"
"1024x768" "800x600" "640x480"
Viewport 0 0
Depth 24
EndSubSection
EndSection
The monitor came with sufficient information to "fake it" this way.
{o.o} Joanne
{o.o}
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