I've got a similar experience with intel 965 with or without explicitly
loading the dri-module:
I tried to use the commercial CFD-mesh-generator IcemCFD with Ubuntu
Gutsy (Kubuntu alternate-installation on AMD64) on a Dell Optiplex 745,
one graphics controller Intel 965 with two monitors connected. First all
seems to do well but after a couple of IcemCFD-operations mouse and
keyboard input don't work, the screen is messed up and you need a hard
reboot.
In order to reproduce the error more easily (and without the need for an
IcemCFD-Licence) I tested gmsh which didn't seem to have problems. I
guess from the slow display that it doesn't use OpenGL/Mesa.
Next I compiled the contents of the mesademos-package. Those demos can
lead to the same experience: When more than one of them is running and
the windows are moved fast on the screen one over the other, sooner or
later the system crashes (most of the time). The demos "terrain",
"tunnel", "fire" and "bounce" were my favorite candidates, two or three
of them, some window-moving preferably also from one screen to the other
and one over the other, and it took most certainly less than a minute to
stop my computer.
I tested three different setups to check wether the dualhead
configuration is the problem: First the dual head configuration with
correct resolution on both screens. For setting the correct resolution
on both screens I call the xrandr-utility from within
/etc/kde3/kdm/Xsetup: (/usr/bin/xrandr --output TMDS-1 --auto). Second I
skip the xrandr call which leads to a wrong aspect ratio on the second
screen connected to TMDS-1 since it is a wide screen 16:9 and the other
is 4:3. It makes no difference. Last I use only one screen. This does
not help either.
I also tried to install the newer driver package xserver-xorg-video-
intel from Hardy (Version 2.2.0+git20080107-1ubuntu2 instead of
2.1.1-0ubuntu9), it did not help.
I tried with and without explicitly loading the dri-module, but that
does not seem to have any effect. In the logfile it says that the dri-
module is loaded though in the xorg.conf there is no section "Module" at
all. How can I prevent xorg from loading the dri-module?
An excerpt from lspci:
00:02.0 VGA compatible controller: Intel Corporation 82Q963/Q965 Integrated
Graphics Controller (rev 02)
00:02.1 Display controller: Intel Corporation 82Q963/Q965 Integrated Graphics
Controller (rev 02)
Attached are the xorg.conf for the one-screen-configuration and the
corresponding logfile.
** Attachment added: "xorg.conf"
http://launchpadlibrarian.net/11776296/xorg.conf
--
opengl total freeze using DRI with intel graphics chip
https://bugs.launchpad.net/bugs/177518
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