The patch noted in comment #3 and #4 is now upstream in linus' tree. This patch however is not in the Karmic kernel tree.
ogasaw...@yoji:~/linux-2.6$ git show 0ef82af7253c1929a3995f271b8b0db462d1a0c3 commit 0ef82af7253c1929a3995f271b8b0db462d1a0c3 Author: Chris Wilson <ch...@chris-wilson.co.uk> Date: Sat Sep 5 18:07:06 2009 +0100 drm/i915: Pad ringbuffer with NOOPs before wrapping According to the docs, the ringbuffer is not allowed to wrap in the middle of an instruction. G45 PRM, Vol 1b, p101: While the “free space” wrap may allow commands to be wrapped around the end of the Ring Buffer, the wrap should only occur between commands. Padding (with NOP) may be required to follow this restriction. Do as commanded. [Having seen bug reports where there is evidence of split commands, but apparently the GPU has continued on merrily before a bizarre and untimely death, this may or may not fix a few random hangs.] Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk> CC: Eric Anholt <e...@anholt.net> Signed-off-by: Eric Anholt <e...@anholt.net> -- [i945GM] GPU lockup with intel 2:2.8.1-1ubuntu1 https://bugs.launchpad.net/bugs/424613 You received this bug notification because you are a member of Ubuntu-X, which is the registrant for xf86-video-intel. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp