After upgrading to kernel 2.6.28 I see about 60-100 extra wakeups as reported by Powertop coming from i915@pci... interrupts (the problem doesn't happen with kernel 2.6.27). It happens on my two machines using Intel graphics (a 5 year old Pentuim 4 using i845G chipset and new Core 2 Duo using G45 chip). It only happens when booting directly into X. If I bootup to console and start X manually, no problem. Also th problem goes away switching to console and back to X (or suspending to disk or RAM and waking up). References: http://bugzilla.kernel.org/show_bug.cgi?id=12337 http://marc.info/?l=linux-kernel&m=123547283726418&w=2 I'm using xserver-1.5.3 and xf86-video-intel-2.4.3.
I upgraded to xf86-video-intel 2.6.1 (also had to upgrade liddrm to 2.4.5 and install libpthread-stubs) and the problem persisted (about 140 wakeups this time). Switching to console and trying to go back to X hard locked the system, so I can't verify the problem goes away doing so.
A small update: I just tested using UXA (instead of EXA) and that makes the problem disappear.
Since EXA probably won't be supported going forward, I'll close this out as fixed since UXA doesn't have the problem. Thanks for reporting.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.