Bug 19415

Summary:	[945GM] X fail to start on kernel 2.6.28
Product:	DRI	Reporter:	Li Peng <peng.li>
Component:	DRM/Intel	Assignee:	Default DRI bug account <dri-devel>
Status:	CLOSED FIXED	QA Contact:
Severity:	major
Priority:	medium	CC:	hugo.jacques, wl
Version:	XOrg git	Keywords:	NEEDINFO
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Li Peng 2009-01-05 23:01:58 UTC

kernel 2.6.28
Xorg 1.5.99.3
xf86-video-intel 2.5.99.1
mesa intel-2008-q4 branch

X failed to start and print following kernel message 

[drm:i915_irq_emit] *ERROR* i915_irq_emit called without lock held, held  0 owner 00000000 de8de9c0

Comment 1 Li Peng 2009-01-05 23:12:27 UTC

After bisect, below commit cause the problem, revert it could fix the issue. It is strange that my kernel config has "CONFIG_HIGHMEM64G=y", and GEM works with this option.

commit ac5c4e76180a74c7f922f6fa71ace0cef45fa433
Author: Dave Airlie <airlied@redhat.com>
Date:   Fri Dec 19 15:38:34 2008 +1000

    drm/i915: GEM on PAE has problems - disable it for now.
    
    On PAE systems, GEM allocates pages using shmem, and passes these
    pages to be bound into AGP, however the AGP interfaces + the x86
    set_memory interfaces all take unsigned long not dma_addr_t.
    
    The initial fix for this was a mess, so we need to do this correctly
    for 2.6.29.

Comment 2 Andrés Becerra Sandoval 2009-02-23 06:31:01 UTC

I found the same problem that Li Peng in Gentoo with the following versions:

xorg-server-1.5.3
xf86-video-intel-2.6.1
media-libs/mesa-7.3
gentoo-sources-2.6.28-r1  (linux kernel 2.6.28.1 )


But, with the same versions of the programs and a new kernel:

gentoo-sources-2.6.28-r2  (linux kernel 2.6.28.5)

X is starting and working correctly.

Comment 3 Gordon Jin 2009-04-20 01:10:51 UTC

*** Bug 21265 has been marked as a duplicate of this bug. ***

Comment 4 Hugo Jacques 2009-04-23 08:08:00 UTC

FYI, I do get the same kind of problem with 2.6.28.9 on a 945G system
xorg server 1.6.0
xf86-video-intel 2.7.0
libdrm 2.4.7
mesa 7.3

Comment 5 Gordon Jin 2009-07-09 00:15:34 UTC

Peng, does this still exist in the latest kernel?

Comment 6 Li Peng 2009-07-09 00:24:30 UTC

(In reply to comment #5)
> Peng, does this still exist in the latest kernel?
> 

No, it is be fixed with Dave's agp patch in 2.6.31.

Comment 7 Hugo Jacques 2009-07-09 00:29:24 UTC

(English message follows) Bonjour, Je suis en congé parental jusqu'au 13 jullet 2009. Pour toute urgence concernant le travail, veuillez contacter Louis Marchand (louis.marchand@verint.com). 

Hi, I will be out of office until July 13th 2009. For any urgent matters regarding work, please contact Louis Marchand (louis.marchand@verint.com). Hugo

Comment 8 Gordon Jin 2009-07-09 00:55:47 UTC

closing as the reporter says it's fixed.
If other people still have problem with 2.6.31, please file separate bugs.

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