Please install the unofficial driver like described in the previous post
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/243991/comments/3
. Make a backup of your working xorg.conf, create a new one with the usual
command and confirming everything without changing.
After a logout please check if both problems are gone and post your
/var/log/Xorg.0.log and the output of >>apt-cache policy
xserver-xorg-video-intel<< if not. Don't remove the driver if it doesn't work.
Most likely the VideoRam option fixes your 3D issues but the point which I
don't understand is according to manpage VideoRam option should be ignored by
-intel driver.
"By default, the i810 will use 8 megabytes of system memory for graphics.
For the 830M and later, the driver will automatically size its memory
allocation according to the features it will support. The VideoRam option,
which in the past had been necessary to allow more than some small amount of
memory to be allocated, is now ignored."
The screen corruption might be an EDID problem so we have to check it.
Add the line >>Option "XaaNoPixmapCache"<< without (>><<) to your
xorg.conf Device section which then should look like:
...
Section "Device"
Identifier "Configured Video Device"
Option "XaaNoPixmapCache"
EndSection
...
After a logout check if the screen corruption (the horizontal lines) are
gone and maybe your 3D issues too. If not the corruptions are most
likely an EDID problem which we can confirm later. Please attach your
current /var/log/Xorg.0.log afterwards.
To check the 3D issue add the line >>VideoRam 440320<< without (>><<)
to your xorg.conf Device section and remove the Xaa option. After a
logout check the game performance and please attach your current
/var/log/Xorg.0.log afterwards.
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Incomplete
--
bugs and fixes to play 3d games on i810 i815
https://bugs.launchpad.net/bugs/243991
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