From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Wilson <chris@chris-wilson.co.uk>
Subject: Re: Errors while resuming from hibernate in 2.6.35-rc5
Date: Tue, 20 Jul 2010 08:31:49 +0100
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To: Pedro Ribeiro <pedrib@gmail.com>, intel-gfx@lists.freedesktop.org
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On Tue, 20 Jul 2010 01:56:01 +0100, Pedro Ribeiro <pedrib@gmail.com> wrote:
> with kernel 2.6.35-rc5 I'm seeing a problem which happens every few
> hibernate/resume cycles.
> When I resume my computer, X is black (only the mouse cursor is
> visible) and the X server outputs a stack trace to the VT. Changing to
> the VT and back restores xorg correctly. dmesg says:
> 
> [118132.523397] video LNXVIDEO:00: Restoring backlight state
> [118132.523808] render error detected, EIR: 0x00000010
> [118132.523811]   IPEIR: 0x00000000
> [118132.523812]   IPEHR: 0x00000000
> [118132.523814]   INSTDONE: 0xfffffffe
> [118132.523815]   INSTPS: 0x00000000
> [118132.523816]   INSTDONE1: 0xffffffff
> [118132.523818]   ACTHD: 0x02000000
> [118132.523819] page table error
> [118132.523821]   PGTBL_ER: 0x00040000
> [118132.523823] [drm:i915_report_and_clear_eir] *ERROR* EIR stuck:
> 0x00000010, masking
> 
> This would not happen with 2.6.34. My hardware is a GM45.
> 
> any idea what this might be?

Looks like we got the ordering wrong. My guess is that we enabled the
backlight controller whilst the pipe was turned off. Can you try and
capture the error/dmesg with drm.debug=0xf? Meanwhile, it's time to hit
the docs and see if they have any advice.

-- 
Chris Wilson, Intel Open Source Technology Centre