I'm pretty sure it's a bug in the kernel driver rather than the xorg driver. 3.2.0-39-generic definitely has the issue in a pretty severe way, but 3.5.0-26-generic (from generic-lts-quantal) is working much better. I'm seeing vast improvements with processor usage overall.
There are a few changes to the i915 driver listed in the kernel.org changelog for 3.2.40, so the pre-proposed Ubuntu kernel package is probably worth checking out also. The lts-quantal kernel still has a few issues, but Silverlight seems to recover on its own from choppy playback much of the time now. My workarounds also seem to be much more effective.
The crash issue listed above after upgrading the xorg driver was related to libGL.so.1 getting replaced by one of the dependencies. A package management bug made it kind of a pain to resolve, but I can use netflix-desktop again after working around a much more critical bug in Ubuntu itself (https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1130419).
I'm pretty sure it's a bug in the kernel driver rather than the xorg driver. 3.2.0-39-generic definitely has the issue in a pretty severe way, but 3.5.0-26-generic (from generic- lts-quantal) is working much better. I'm seeing vast improvements with processor usage overall.
There are a few changes to the i915 driver listed in the kernel.org changelog for 3.2.40, so the pre-proposed Ubuntu kernel package is probably worth checking out also. The lts-quantal kernel still has a few issues, but Silverlight seems to recover on its own from choppy playback much of the time now. My workarounds also seem to be much more effective.
https:/ /www.kernel. org/pub/ linux/kernel/ v3.x/ChangeLog- 3.2.40 /launchpad. net/~kernel- ppa/+archive/ pre-proposed? field.series_ filter= precise
https:/
The crash issue listed above after upgrading the xorg driver was related to libGL.so.1 getting replaced by one of the dependencies. A package management bug made it kind of a pain to resolve, but I can use netflix-desktop again after working around a much more critical bug in Ubuntu itself (https:/ /bugs.launchpad .net/ubuntu/ +source/ apt/+bug/ 1130419).