Comment 38 for bug 477256

[This comment goes to freeze bugs on intel 855GM]

At bug 456902 (similar freezes on 845G) there is currently an effort to find where xserver-xorg-video-intel and/or libdrm changed and so that the freezes were triggered. Brian Rogers has a PPA that he is updating libdrm and -intel until they catch a version which freezes (they first found that a standard Karmic kernel with Jaunty libdrm and -intel did not freeze). It is possible that the same is true for 855GM and this is a chance to catch a free ride from the 845G testing effort. In order to test, use the standard Karmic kernel and add Brian's PPA: https://launchpad.net/~brian-rogers/+archive/graphics-testing . See the bug 456902 comment #29 and after for more details.

Apologies if someone already reported that Jaunty with Karmic kernel also freezes. In that case, testing older -intel and libdrm in Karmic is probably pointless. I'm loosing the overview as there are many similar bug reports on 845G, 855GM and 945G/945GM, and I forget exactly what is already tested for each chipset.