Bug detailed description:
On gnome-session with compiz,When running 3D games or its
demo(urbanterror,openarena) it works fine on IVB, but there will be some "missed IRQ" error messages in dmesg .When cat i915_error_state,no error state collected.But When enable semaphores,there is no error message.
Especially,without compiz,it's OK.
1. gnome-session(enable compiz)
2. run 3D games or its demo
what's the difference with bug#38862?
In bug#38862,the screen will be stuttered when run games or demos,what's more, it has the problem of "GPU hang".
in this bug ,the games or demos work well and have no such problems. It only has "missed IRQ" error messages in dmesg.
(In reply to comment #1)
> what's the difference with bug#38862?
Add a word ,this problem will also appear when only start gnome-session with compiz even if you didn't run any games or demos.
After discussion on bug #38862, let's use that one for tracking the dmesg messages. The GPU hangs are handled by bug #38863.
*** This bug has been marked as a duplicate of bug 38862 ***
Closing old verified.