On Tue, Dec 7, 2010 at 5:13 PM, Chris Wilson <ch...@chris-wilson.co.uk> wrote: > On Tue, 7 Dec 2010 16:31:24 -0500, Andrew Lutomirski <l...@mit.edu> wrote: >> On Tue, Dec 7, 2010 at 4:03 PM, Andrew Lutomirski <l...@mit.edu> wrote: >> > Hi all- >> > >> > Somewhere between Fedora 13 (with 2.6.35, I think) and Fedora 14 + >> > 2.6.36.1, i915 started generating exactly 50 interrupts per second >> > (suspiciously equal to my refresh rate) when X is running. I have the >> > Xorg driver 2.12.0 (specifically >> > xorg-x11-drv-intel-2.12.0-6.fc14.1.x86_64). When I switch to a text >> > console but leave X running, the interrupts stop. >> > >> > Any ideas what to look at? >> >> Quitting compiz fixes it. Suspending compiz also fixes it. > > So it is the vblank interrupt. The vblank interrupt is get alive for a few > seconds after the last use. If it keeps going, then either the system is > as idle as you believe or we lost track of the last user and forget to > switch off the interrupt. > > drm.debug=0xf (echo 0xf > /sys/module/drm/parameters/debug) will have the > gory details of who/when triggers the vblank interrupt.
Will do tomorrow. I'm currently hampered by: 47: 9073 9455 PCI-MSI-edge <A0>Bs3^A<88><FF><FF> in /proc/interrupts after a reboot (I *think*, but I'm not entirely sure, that that's supposed to be i915). --Andy _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
