Bug 42597

Summary:	Random freezes on z68 motherboard
Product:	Other	Reporter:	Graeme Russ (graeme.russ)
Component:	Other	Assignee:	other_other
Status:	RESOLVED INVALID
Severity:	normal	CC:	ccomren
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	3.2.0+	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	/var/log/messages Xorg log

Description Graeme Russ 2012-01-18 00:59:22 UTC

Brand new ASRo Pro3 Gen3 with a 3.3GHz i5 2500 and 8GB RAM, BIOS updated to 1.20 (12/16/2011)

Running Fedora 16 x86-64 with all latest patches (kernel version is 3.1.9-1.fc16.x86_64)

Random (anywhere from <1 hour to >12 hours) lockups with a very distinct sympton - a psychedelic flashing sreen (solid colout over entire screen which cycles through various shades of 'bright' colours). When it happens, the machine is totally locked (cannot ping) - Power cycle required to reboot

I've checked /var/log/messages (attached as messages.log) and Xorg.0.log (attached) but there are not kernel panics or anything suspicious apart from a 'Failed to enable MSI-X' message

Comment 1 Graeme Russ 2012-01-18 01:04:33 UTC

Created attachment 72100 [details]
/var/log/messages

the kernel does not oops

Comment 2 Graeme Russ 2012-01-18 01:05:27 UTC

Created attachment 72101 [details]
Xorg log

Comment 3 Graeme Russ 2012-01-19 11:03:19 UTC

I can now confirm this happens with a vanilla 3.2.0 kernel

Comment 4 Graeme Russ 2012-01-24 23:22:07 UTC

Definitely i915 related - I added a PCIe nVidia card and the machine ran perfectly stable. As soon as I took it at and reverted to onboard, the freezing started immediately

Also, I'm actually running an i5 2500K, not a 2500. That's important as the 2500K has the Intel HD 3000 graphics core while the 2500 has the HD 2000 core

I've tried adding i195.semaphores=1 on the kernel command line but it still hangs

I also tried compiling the i915 module without KMS but that resulted in un-accelerated graphics

Comment 5 ccomren 2012-01-25 10:54:41 UTC

I've recently had a problem with an AsRock mainboard. As it turned out, their voltage control of the integrated GPU was buggy. Setting the voltage to "fixed 1.5V" instead of "auto" resolved the issue.

Comment 6 Graeme Russ 2012-01-26 08:08:08 UTC

I now think this is a Motherboard and/or CPU issue - Crashing occurs in Windows 7 and have also had a hang when using an nVidia G210 PCIe card