Bug 74485

Summary:	[NVE6] system hangs with 3D applications
Product:	Mesa	Reporter:	prg
Component:	Drivers/DRI/nouveau	Assignee:	Nouveau Project <nouveau>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium
Version:	git
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	dmesg of the hang dmesg of CPU stall workaround for the issue

Description prg 2014-02-04 03:23:52 UTC

Created attachment 93330 [details]
dmesg of the hang

Kernel 3.13.1, mesa git from 2014-02-01 (10.1.0-devel (git-dc00ec1))
Non-composited KDE desktop

System randomly hangs when using 3D applications, tried with Half Life 2, Dota2, some older games with wine. The hang might happen right when entering the game or maybe after a few minutes of playing. Just running glxgears works for quite some time (>35min).

Bug #72180 suggests that using blob fw fixes random lockups, but it doesn't help in my case. Frequency of hangs seems to be about the same with and without blob fw.

Bug #63165 reports display corruption which i haven't seen yet and has quite different error messages in the logs.

Comment 1 prg 2014-02-04 03:27:28 UTC

Created attachment 93331 [details]
dmesg of CPU stall

"INFO: rcu_sched self-detected stall on CPU { 0}" also happens sometimes

Comment 2 prg 2014-02-12 20:21:52 UTC

Created attachment 93959 [details] [review]
workaround for the issue

calim on #nouveau suggested this workaround which seems to disable some kind of compression or something. I've tested for a few days and indeed I haven't heard from this PLTCG thing anymore since applying that patch. The previously mentioned games are perfectly usable now.

Comment 3 prg 2014-08-25 15:10:15 UTC

Can't reproduce anymore with kernel 3.17-rc1, nouveau from git://people.freedesktop.org/~darktama/nouveau at commit 351a08b and mesa 10.4.0-devel (git-8d8a5eb)

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