Bug 34437

Created attachment 43515 [details]
dmesg before suspend

Created attachment 43516 [details]
dmesg after suspend

Created attachment 43517 [details]
intel_reg_dumper before suspend

Created attachment 43518 [details]
intel_reg_dumper after suspend

Created attachment 43520 [details]
intel_gpu_dump before suspend (part 1)

I used split for this since the original file size exceeds Bz limits. Just concat the file to get the original back

Created attachment 43521 [details]
intel_gpu_dump before suspend (part 2)

Created attachment 43522 [details]
intel_gpu_dump after suspend (part 1)

Created attachment 43523 [details]
intel_gpu_dump after suspend (part 2)

*** Bug 34417 has been marked as a duplicate of this bug. ***

This should be fixed in rc6 with:

commit ed764e7ca042dbf4cc1c7f4e12cd842c7789f133
Author: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>
Date:   Sat Feb 12 01:40:16 2011 +0100

    ACPI / Video: Probe for output switch method when searching video devices.
    
    This patch reverts one hunk of 677bd810eedce61edf15452491781ff046b92edc
    "ACPI video: remove output switching control", namely the removal of
    probing for _DOS/_DOD when searching for video devices.
    
along with bug 34417.

I'm still seeing this with both Fedora's 2.6.38-0.rc6.git2.1 and drm-intel-fixes 011b9910bdaf2e52c48c012490ab444fceea1959 (post-RC6) -- should I reopen this and my other bug?

Reported fix does not actually work

The brightness issue (34417) is still unresolved, but the kernel bug tracker report referenced in the Git commit does contain a user report of an additional kernel switch that I need to enable to at least get the display restored when resuming:

i915.lvds_use_ssc=0

Now that there's a quirk infrastructure for disabling SSC on given models, perhaps this particular Vaio Y should be blacklisted as well (see the bug this depends on and the posted Git commit fixing it)

Where do I get the subsystem_vendor and subsystem_device numbers that I need to add my machine to the blacklist?

From lspci -nnvv, it looks like 104d:9076 needs to be added to the quirk list.

Would blacklisting this affect other Sony devices, or are these numbers unique to my particular model?

00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
        Subsystem: Sony Corporation Device [104d:9076]
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 41
        Region 0: Memory at d0000000 (64-bit, non-prefetchable) [size=4M]
        Region 2: Memory at c0000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at 5050 [size=8]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915

Created attachment 49615 [details] [review]
drm/i915: Add quirk to disable SSC on Sony Vaio Y2

Patch fixing this, to be applied to the 3.0 source tree, as sent to the mailing lists:

  http://article.gmane.org/gmane.linux.kernel/1172092

A patch referencing this bug report has been merged in Linux v3.1-rc1:

commit 070d329ae52e2fde341771d753a5b728145881f4
Author: Michel Alexandre Salim <salimma@fedoraproject.org>
Date:   Thu Jul 28 18:52:06 2011 +0200

    drm/i915: Add quirk to disable SSC on Sony Vaio Y2