The downgrade to 2..4 did not help me either. In fact, it made things worse. The bootm line is that cpu usage was minimal on 8.10, and immediately on upgrade to 9.04, the X process's cpu usage shot up to a time average of about 50% of one core (of a 2.0 GHz Core2Duo, 4 MB L2). Downgrading brought the time average cpu usage of the X process to around 80% of one core.
While I see the merit in trying to narrow down the cause of the problem, I honestly dont buy the 'it must be some other problem that other people have' . The problem started in the same way for everybody, and its possible in a specific use case the older driver is able to avoid some other bug that was introduced. -- [i965] High %CPU/Power Usage unless downgrade to 2.4 (UXA/EXA) https://bugs.launchpad.net/bugs/364359 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs