Bug 41349

Summary:	[IVB] "missed IRQ" in dmesg, when starting gnome-session with compiz, if without gpu semaphores
Product:	DRI	Reporter:	libo <bo.c.li>
Component:	DRM/Intel	Assignee:	Chris Wilson <chris>
Status:	CLOSED DUPLICATE	QA Contact:
Severity:	minor
Priority:	high	CC:	ben, chris, daniel, eugeni, jbarnes
Version:	XOrg git
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description libo 2011-09-29 18:12:27 UTC

System Environment:
--------------------------
 Platform: IVB
 Libdrm:(master)2.4.26-11-gc82ef03e4c92017bf5644f294ea04e30500f8d4c
 Mesa:	(master)b095b683f8451b54cca52593dc331f82844c9c30
 
 Xf86_video_intel:(master)2.16.0-93-g6395894ada6b9c14deb62814ccf55848eaa80527
 Cairo:	(master)82a7eac1de6a9f6896e382e55b2061cd17bf4dd6
 Libva:	(master)a10fda6e3dcddcebaa9b2f61f194211548f7f9b9
 Kernel:(drm-intel-next) 64a742fac3a22f57303d8f1b7e347350a1c48254

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.

Reproduce steps:
----------------
1. gnome-session(enable compiz)
2. run 3D games or its demo

Comment 1 Gordon Jin 2011-09-29 18:47:51 UTC

what's the difference with bug#38862?

Comment 2 libo 2011-09-29 19:19:29 UTC

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?

Comment 3 libo 2011-09-29 19:28:34 UTC

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.

Comment 4 Eugeni Dodonov 2011-11-03 14:04:38 UTC

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 ***

Comment 5 Elizabeth 2017-10-06 14:51:56 UTC

Closing old verified.

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