[Intel-gfx] Intel 965 and Custom Resolutions

The Fungi fungi at yuggoth.org
Mon Aug 30 19:14:22 CEST 2010

On Mon, Aug 30, 2010 at 04:44:49PM +0000, Nasa wrote:
> The only possible solution is to try and use xrandr to change the
> resolution after X is started. Use a combination of CVT (to create
> modelines) and xrandr to to change the resolutions.

I used to have to do the same, and had this at the top of my

 test -x /usr/bin/xrandr \
 && /usr/bin/xrandr \
    --newmode "1280x720" 74.25 1280 1390 1430 1650 720 725 730 750 \
 && /usr/bin/xrandr --addmode HDMI1 1280x720 \
 && /usr/bin/xrandr --output HDMI1 --mode 1280x720

Eventually, support was added to feed specific modes into KMS at
boot via kernel command line parameters and so I did that for a
while (I no longer have info on what that looked like, sorry).

At some point all that ceased to be necessary for me, and the driver
now figures out that it should use ATSC 720p timings with my HDTV
even though it returns what appears to be an entirely malformed EDID
block (I'm just booting with video=i915:modeset=1 now). Not sure
why, but those timings appear in the list of "probed modes for
output HDMI1" in my Xorg.0.log even though it's not in the output of
'sudo get-edid | parse-edid' (a fallback resolution of some sort
from the kernel, maybe?).
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