Bug 765336

Summary:	Hard freeze of system, seems to be related to display brightness switching.
Product:	[openSUSE] openSUSE 12.2	Reporter:	Alex Trevisol <alex.trevisol>
Component:	Kernel	Assignee:	Egbert Eich <eich>
Status:	RESOLVED WONTFIX	QA Contact:	E-mail List <qa-bugs>
Severity:	Critical
Priority:	P5 - None	CC:	alex.trevisol, nwr10cst-oslnx
Version:	Beta 1
Target Milestone:	---
Hardware:	64bit
OS:	openSUSE 12.2
Whiteboard:
Found By:	Community User	Services Priority:
Business Priority:		Blocker:	No
Marketing QA Status:	---	IT Deployment:	---
Bug Depends on:	682528
Bug Blocks:

Description Alex Trevisol 2012-06-04 16:15:15 UTC

+++ This bug was initially created as a clone of Bug #682528 +++

User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:2.0.0) Gecko/20100101 Firefox/4.0

System is a Dell Inspiron N5010 laptop with Intel Arrandale / Ironlake graphics (uses i915 driver).  Desktop effects are turned off.

With normal active use, everything is fine.  But when I let it sit idle for a while, and return to it, I sometimes find it is frozen (no activity, does not respond to ping over the network, requires power off to regain control).


Reproducible: Sometimes

Steps to Reproduce:
System is set at about 50% brightness (I like it that way).  The default settings further dim the screen after around 10 minutes of inactivity.  If I do something, such as move the mouse, when in that dimmed state, it sometimes brightens to the normal brightness and then instantly freezes.  (I have currently turned off that dimming, to reduce the frequency of the problem).



There is a forum thread at http://forums.opensuse.org/english/get-technical-help-here/laptop/456110-system-freeze-possible-diagnosis.html

Partial output from "lspci -nnk":

00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integ
rated Graphics Controller [8086:0046] (rev 18)
        Subsystem: Dell Device [1028:0447]
        Kernel driver in use: i915

Comment 1 Jeff Mahoney 2014-08-08 20:29:18 UTC

This report is against openSUSE 12.2 which is no longer under maintenance. If
you are able to reproduce it with openSUSE 13.1 or openSUSE Factory, please
re-open and reset the the "Product" field to the appropriate release.

Comment 2 Neil Rickert 2014-08-08 21:52:59 UTC

As I recall, I originally reported this for 11.3 (or perhaps 11.4).  That was a different bug number, and I don't currently have a record.

It still happens in 13.1.  I have not yet tested factory on that laptop.

What I have been doing since 12.2, is set the KDE power settings to never dim the display.  (Turning off is okay, but dimming is a problem).  With that setting, the problem only occurs rarely.

I won't reopen, but then I did not initiate this report.  I'm leaving this final comment in case others have the problem.