[PATCH 0/1] drm-set-default-noedid-res.patch

[Carsten Emde]

Dave,

>> Some monitors and, more often, kvm switches do not provide working
>> EDID data. KMS based X configurations in recent server versions no
>> longer allow to override the screen resolution which makes it
>> impossible to correctly adapt the screen resolution to the monitor
>> in use. This patch allows to define the fallback screen resolution
>> to something else than the default 1024x768.
> Does video=800x600 not work for you?
No, this only sets the tty resolution; the resolution of the X server
appears to be limited to the maximum as specified at line 123 in
drivers/gpu/drm/drm_crtc_helper.c:
   drm_add_modes_noedid(connector, x, y);

kernel parameter               TTY resolution          Max. X resolution
  -                               640x480                 1024x768
vga=0x31b                       1280x1024                1024x768
video=1280x1024                 1280x1024                1024x768
video=1280x1024 vga=0x31b       1280x1024                1024x768
drm.noedidres                   1280x1024                1280x1024
drm.noedidres vga=0x31b         1280x1024                1280x1024

X.Org X Server 1.7.6
Build ID: xorg-x11-server 1.7.6-4.fc12

	Carsten.