61769 – "xset dpms force off" -> Crash

Bug 61769 - "xset dpms force off" -> Crash

Summary: "xset dpms force off" -> Crash

Status:	CLOSED INVALID

Alias:	None

Product:	DRI
Classification:	Unclassified
Component:	DRM/Intel (show other bugs)
Version:	unspecified
Hardware:	x86-64 (AMD64) Linux (All)

Importance:	medium normal
Assignee:	Intel GFX Bugs mailing list
QA Contact:	Intel GFX Bugs mailing list

URL:
Whiteboard:
Keywords:

Depends on:
Blocks:

Reported:	2013-03-04 00:04 UTC by Andreas Kloeckner
Modified:	2017-07-24 22:58 UTC (History)
CC List:	0 users

See Also:
i915 platform:
i915 features:

Attachments
System data from Debian 'reportbug' tool. (78.04 KB, text/plain) 2013-03-04 00:04 UTC, Andreas Kloeckner	no flags	Details
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Description Andreas Kloeckner 2013-03-04 00:04:49 UTC

Created attachment 75873 [details]
System data from Debian 'reportbug' tool.

On my Thinkpad X220, running the Intel driver v2.20.14 with kernel 3.8 causes "xset dpms force off" to lead to a hard crash of the machine. No SSH, no Alt+SysRq.

More system details in attached bug template. Downgrading to kernel 3.2 fixes this, but leads to other annoyances.

Related: http://www.gossamer-threads.com/lists/gentoo/user/258587

Comment 1 Andreas Kloeckner 2013-03-04 00:14:09 UTC

Introduced a major contributing factor: "i915.i915_enable_fbc=1" on the kernel command line. Crash appears to happen with this, fine without.

Should've mentioned: Sandy bridge i7-2620M (Gen6?)

SNA: on/off doesn't seem to matter.

Comment 2 Jani Nikula 2013-03-04 08:01:44 UTC

(In reply to comment #1)
> Introduced a major contributing factor: "i915.i915_enable_fbc=1" on the
> kernel command line. Crash appears to happen with this, fine without.

FBC is disabled by default on gen6 (and earlier) for a reason. Please don't enable it and expect everything to work. Closing as invalid, please reopen if you keep having trouble without the i915.i915_enable_fbc module parameter.

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