Re: amd64 DRMKMS Intel regression - partial success (workaround)

[Piotr Meyer <aniou%smutek.pl@localhost>]

On Sun, Jan 18, 2015 at 10:21:28PM +0100, Piotr Meyer wrote:
> Commit, that broke EDID read on my hw is described as "Import drm 
> from Linux 3.15"[2].
> 
> 1 - http://smutek.pl/netbsd/drmkms-regression-201501/last-working-edid-messages.txt
>   - http://smutek.pl/netbsd/drmkms-regression-201501/last-working-edid-Xorg.log.txt
> 2 - https://github.com/jsonn/src/commit/740a2c2859

Apart of dysfunctional EDID I was able to get working X (even with
glxgears) and - as far as I can see - without artifacts. I made my
tests on -current but same method should work on NetBSD 7:

$ cat .xinitrc
xrandr --newmode 1920x1080 148.50  1920 2008 2052 2200  1080 1084 1089 1125 +hsync +vsync
xrandr --addmode HDMI1 1920x1080
xrandr --output HDMI1 --mode 1920x1080
twm

Values for mode was taken from last valid EDID read, from Xorg.log. 
It reminds me old XF86Config and carefully crafted modelines (and
this old-fashioned way should work in this case also, I think). :)

Regardless, it would be nice to have working EDID - is there any
debug or test that I can do?

My CPU: G2030 (Ivy Bridge) with integrated HD 2500 

Regards,
-- 
Piotr 'aniou' Meyer