Bug 31773

Summary:

[SNB] System hang occurs while booting with rev07 machines with latest intel X drivers and disabling BLIT engine helped.

Product:

DRI

Reporter:

Manjeet Singh <manjeet>

Component:

DRM/Intel

Assignee:

Chris Wilson <chris>

Status:

CLOSED FIXED

QA Contact:

Severity:

normal

Priority:

medium

CC:

jbarnes

Version:

unspecified

Hardware:

Other

OS:

All

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
dmesg logs attached	none
xorg.log file attached	none

Description Manjeet Singh 2010-11-19 11:49:02 UTC

This is occurring because of a  HW bug with older revisions. 

If lspci -n shows rev 07 for the cpu and VGA card (something like 8086:0104(rev 07), 8086:0116(rev 07)} then system hangs during boot

Hardware: Huron River UMA
OS- Quicweb (fedora based linux).
Kernel- 2.6.37-rc1-next-20101110 with patch - http://git.kernel.org/?p=linux/kernel/git/ickle/drm-intel.git;a=commitdiff;h=5588978882b5f4b81169bd7f9bc941e3a12ee8ba

X driver- latest intel X drivers(git files taken on Nov 10)

Steps to reproduce:
Boot to Linux (fedora based)
System just boots up till cursor on the screen and failed to load the home screen

see the attached dmesg and Xorg.

Comment 1 Manjeet Singh 2010-11-19 11:49:46 UTC

Created attachment 40416 [details]
dmesg logs attached

Comment 2 Manjeet Singh 2010-11-19 11:50:19 UTC

Created attachment 40417 [details]
xorg.log file attached

Comment 3 Chris Wilson 2010-12-05 03:44:20 UTC

commit c2fac6ca108734dd9566570b15f01cc476fa53dc
Author: Matthias Hopf <mhopf@suse.de>
Date:   Fri Nov 19 04:29:57 2010 +0100

    Don't use hardware acceleration on Sandybridge rev 07 hardware or earlier.
    
    This is known to lock up the GPU even with the workaround in place.
    
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=31773
    Signed-off-by: Matthias Hopf <mhopf@suse.de>
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

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