Re: i386 i915drmkms on 82915GM (eeepc 900)

[Robert Swindells <rjs%fdy2.co.uk@localhost>]

mlh%goathill.org@localhost (MLH) wrote:
>> During startup, the LVDS display works fine until about the time
>> the startup messages reach "i915drmkms0". At this time, the external
>> monitor console display switches to a higher resolution and the
>> LVDS goes blank. I can start X on the external monitor but only at
>> low resolutions. I can't get the LVDS monitor to work after bootup.
>> 
>> $ xrandr
>> Screen 0: minimum 320 x 200, current 640 x 480, maximum 4096 x 4096
>> LVDS1 connected 640x480+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
>>    640x480       72.81    75.00    59.94* 
>> VGA1 connected 640x480+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
>>    1024x768      60.00  
>>    800x600       60.32    56.25  
>>    848x480       60.00  
>>    640x480       59.94* 
>
>How can you prevent the console switch to hires which disables the
>LVDS display?

You could build a custom kernel without the drm drivers.

Index: GENERIC
===================================================================
RCS file: /cvsroot/src/sys/arch/i386/conf/GENERIC,v
retrieving revision 1.1119
diff -u -r1.1119 GENERIC
--- GENERIC     13 Feb 2015 18:57:47 -0000      1.1119
+++ GENERIC     23 Feb 2015 16:48:59 -0000
@@ -569,11 +569,11 @@
 #tdfxdrm*      at drm?         # 3dfx (voodoo) DRM driver
 #viadrm*       at drm?         # VIA DRM driver
 
-i915drmkms*    at pci? dev ? function ?
-intelfb*       at intelfbbus?
+#i915drmkms*   at pci? dev ? function ?
+#intelfb*      at intelfbbus?
 
-radeon*        at pci? dev ? function ?
-radeondrmkmsfb* at radeonfbbus?
+#radeon*       at pci? dev ? function ?
+#radeondrmkmsfb* at radeonfbbus?
 
 #nouveau*      at pci? dev ? function ?
 #nouveaufb*    at nouveaufbbus