opengl still causes system lockups with intel gma 950

[Björn Martensen]

i'm more and more regretting buying an intel gma chip based t60, since
all drivers i tried so far (old 1.x driver, 2.0.0 and 2.1.0) cause
opengl apps to freeze the system or kill the x-server in a way that i
can't restart or kill it.

for example ezquake or compiz, tend to work fine for some time. but
suddenly, the whole screen just locks up. no keyboard input is accepted
anymore and i have to reset the laptop by powering it down. this even
happens when viewing images esp. from imageshack. without any warning,
the laptop just locks up.
this makes using opengl completely useless, as it's always hoping the
system doesn't lock up.

with the new 2.1.0 driver, one other case the system froze is _almost_
gone: switching to a tty from X caused funny red and white pixels at the
top of the screen and the whole system froze. with the newer driver,
these pixel lines still appear, with the last screen image (for example
the desktop) below (only like every second line of the image though),
but the system doesn't hang up anymore that regularly. i only
experienced it 3 times in two weeks or so, where it happened almost
everytime i tried to suspend or just exit X with the 2.0.0 driver.

i'm using x-server 1.3, xrandr 1.2.1, mesa 7 and intel driver 2.1.0 on
arch linux.
hopefully opengl will become usable in future driver releases but atm
it's just completely unstable for me.

btw, is there a way to see the amount of memory, which can be used by
the card as video memory? the gma 950 should be able to use up to 224mb,
afaik (bios is up to date) but in virtualbox it shows only 128mb
available.

-- 
Björn Martensen <bjoern.martensen at gmail.com>
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