sandybridge video, minecraft unplayable

[Peter Silva]

using a core i5-2500K

lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) stock everything ubuntu oneiric, open source drivers.

There are many pin-holes of wrong pixels throughout the display, as if there were static in the picture.
The screen is often distorted by a a diagonal line from top left to bottom right.

[Peter Silva (peter-bsqt)]

other than that, framerate is great. wish it worked!

[Peter Silva (peter-bsqt)]

I installed kernel 3.1.0 from kernel-ppa. No change... except it seems faster.

[Peter Silva (peter-bsqt)]

tried xorg-edgers, the display hung constantly, unusable under any user interface.
tried xserver-xorg-intel-sna from ppa, it dumped core on startup.
had to revert everything to get to a usable state.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ricky Brent (rickybrent)]

This bug effected/effects me as well (i5-2520M), but this is a duplicate of https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/882349 and you can work around it with the instructions here :https://bugs.freedesktop.org/show_bug.cgi?id=39730

Robvdl says a proper fix is headed upstream though.

I was able to do the "one shot fix" by compiling the latest intel-gpu-tools from git, then running as root:

sudo ./intel_reg_write 0x9404 0x00001000

[John Brooks (frogging101)]

I too am affected by the bug on Minecraft. I'm running Ubuntu 11.10 desktop version, with an Intel graphics card. Everything is up-to-date from apt AFAIK.