* [Bug 26345] [845G] CPU/GPU incoherency
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Eugeni Dodonov <eugeni@dodonov.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|chris@chris-wilson.co.uk |dri-devel@lists.freedesktop
| |.org
--- Comment #136 from Eugeni Dodonov <eugeni@dodonov.net> 2011-09-08 15:55:37 PDT ---
This issue is affecting a hardware component which is not being actively worked
on anymore.
Moving the assignee to the dri-devel list as contact, to give this issue a
better coverage.
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Chris Wilson <chris@chris-wilson.co.uk> changed:
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CC| |natrio@list.ru
--- Comment #137 from Chris Wilson <chris@chris-wilson.co.uk> 2011-09-09 02:11:19 PDT ---
*** Bug 34868 has been marked as a duplicate of this bug. ***
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--- Comment #138 from Daniel Vetter <daniel@ffwll.ch> 2011-09-20 06:00:31 PDT ---
Created an attachment (id=51401)
View: https://bugs.freedesktop.org/attachment.cgi?id=51401
Review: https://bugs.freedesktop.org/review?bug=26345&attachment=51401
New stab at working around the i845 tlb issues.
I'd be great if anyone with a still-booting i845 could test this. Obviously you
need to disable Shadow. Also, expect some slowdown, but hopefully not that bad.
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--- Comment #139 from György Balló <ballogy@freestart.hu> 2011-11-01 15:04:40 PDT ---
Created attachment 53024
--> https://bugs.freedesktop.org/attachment.cgi?id=53024
The relevant part of dmesg with Daniel's patch
Daniel's patch not works for me. I tested with 3.1 kernel, and I saw only some
dotted line and a cursor when Xorg loadaded. (Attached the relevant part of
dmesg.)
Current state of the driver with the 3.1 kernel:
- Still get random GPU hangs without ShadowFB. It works stable with ShadowFB.
- XVideo: contrast and saturation are misconfigured (Bug 42488)
- OpenGL without ShadowFB: it's fast and stable until a GPU hang. Once GPU hang
occurred, OpenGL apps are no longer works.
- OpenGL with enabled ShadowFB: it works, but very slow, slower than llvmpipe.
- Trying to run GNOME Shell always cause an immediate GPU hang, even if
ShadowFB enabled.
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--- Comment #140 from Abdul Nazar P <nazarkanayi@gmail.com> 2011-11-06 08:44:26 PST ---
pls work for i845
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Mike Ranweiler <mjr@linux.vnet.ibm.com> changed:
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----------------------------------------------------------------------------
CC| |mjr@linux.vnet.ibm.com
--- Comment #141 from Mike Ranweiler <mjr@linux.vnet.ibm.com> 2011-12-08 10:35:22 PST ---
Hi, I've hit this too with:
00:02.0 VGA compatible controller: Intel Corporation 82845G/GL[Brookdale-G]/GE
Chipset Integrated Graphics Device (rev 03)
I tried the patch in comment #138 against 3.2.0-rc4, and I had similar results
as comment #139 - the display wasn't usable.
Is there anything else I can try? I have the system readily available.
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CC| |ptichy@pobox.sk
--- Comment #142 from Chris Wilson <chris@chris-wilson.co.uk> 2012-04-14 06:37:05 PDT ---
*** Bug 40960 has been marked as a duplicate of this bug. ***
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CC| |pjm@nac.net
--- Comment #143 from Chris Wilson <chris@chris-wilson.co.uk> 2012-04-14 06:41:39 PDT ---
*** Bug 40181 has been marked as a duplicate of this bug. ***
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CC| |oxmosys@gmail.com
--- Comment #144 from Chris Wilson <chris@chris-wilson.co.uk> 2012-04-14 07:45:12 PDT ---
*** Bug 19068 has been marked as a duplicate of this bug. ***
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--- Comment #145 from Chris Wilson <chris@chris-wilson.co.uk> 2012-04-16 04:27:15 PDT ---
I've put some recent patches into
http://cgit.freedesktop.org/~ickle/linux-2.6/commit/?h=845g which makes my 845g
much more stable, though I'm still getting spurious GPU hangs under memory
pressure. In that regard SNA is performing better (not only to being a more
complete acceleration architecture) as it is thrashing the GTT far less.
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--- Comment #146 from Chris Wilson <chris@chris-wilson.co.uk> 2012-07-21 18:09:09 PDT ---
*** Bug 27578 has been marked as a duplicate of this bug. ***
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Chris Wilson <chris@chris-wilson.co.uk> changed:
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----------------------------------------------------------------------------
CC| |artem.rusanov@gmail.com
--- Comment #147 from Chris Wilson <chris@chris-wilson.co.uk> 2012-08-03 12:18:44 UTC ---
*** Bug 53065 has been marked as a duplicate of this bug. ***
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Chris Wilson <chris@chris-wilson.co.uk> changed:
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CC| |slenkar@gmail.com
--- Comment #148 from Chris Wilson <chris@chris-wilson.co.uk> 2012-08-26 19:24:34 UTC ---
*** Bug 54093 has been marked as a duplicate of this bug. ***
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--- Comment #149 from slenkar <slenkar@gmail.com> 2012-09-03 02:14:44 UTC ---
thanks chris how do I apply the patch?
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Chris Wilson <chris@chris-wilson.co.uk> changed:
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CC| |tang0th@gmx.com
--- Comment #150 from Chris Wilson <chris@chris-wilson.co.uk> ---
*** Bug 55934 has been marked as a duplicate of this bug. ***
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Chris Wilson <chris@chris-wilson.co.uk> changed:
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--- Comment #151 from Chris Wilson <chris@chris-wilson.co.uk> ---
*** Bug 56933 has been marked as a duplicate of this bug. ***
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Chris Wilson <chris@chris-wilson.co.uk> changed:
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QA Contact|xorg-team@lists.x.org |intel-gfx-bugs@lists.freede
| |sktop.org
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Chris Wilson <chris@chris-wilson.co.uk> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
--- Comment #152 from Chris Wilson <chris@chris-wilson.co.uk> ---
Woohoo!
commit c7f7dd61fd07dbf938fc6ba711de07986d35ce1f
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed Dec 12 19:43:19 2012 +0000
sna: Pin some batches to avoid CS incoherence on 830/845
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=26345
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
I can't promise the incoherence won't show up elsewhere as render corruption,
but my 845g is finally surviving wtf stress tests.
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--- Comment #153 from Chris Wilson <chris@chris-wilson.co.uk> ---
Now in kernel form as well:
commit b75e53bac7f4164e1c53a636352faa3d177b4beb
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Sun Dec 16 18:08:07 2012 +0100
drm/i915: Implement workaround for broken CS tlb on i830/845
Now that Chris Wilson demonstrated that the key for stability on early
gen 2 is to simple _never_ exchange the physical backing storage of
batch buffers I've tried a stab at a kernel solution. Doesn't look too
nefarious imho, now that I don't try to be too clever for my own good
any more.
v2: After discussing the various techniques, we've decided to always blit
batches on the suspect devices, but allow userspace to opt out of the
kernel workaround assume full responsibility for providing coherent
batches. The principal reason is that avoiding the blit does improve
performance in a few key microbenchmarks and also in cairo-trace
replays.
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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--- Comment #154 from Trey Ramsay <tramsay@linux.vnet.ibm.com> ---
These fixes are in the latest 3.8 kernel. Have the GPU hangs been fixed in
earlier versions of the kernel?
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--- Comment #155 from Chris Wilson <chris@chris-wilson.co.uk> ---
(In reply to comment #154)
> These fixes are in the latest 3.8 kernel. Have the GPU hangs been fixed in
> earlier versions of the kernel?
The sna fixes work with any KMS/GEM (i.e. 2.6.29+) kernel. The kernel w/a is
being backported by Julien Cristau for the debian kernel.
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--- Comment #156 from Trey Ramsay <tramsay@linux.vnet.ibm.com> ---
Thanks... We are using 2.6.32 kernel. We had problems with the 845G hanging
but I don't think we were using SNA acceleration at the time. What patches do
you think we need?
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--- Comment #157 from Trey Ramsay <tramsay@linux.vnet.ibm.com> ---
In regards to comment 145, is it recommended to use SNA? We are not using SNA
and have seen GPU hangs on the 845G. Is it better to use SNA and apply the
SNA patch to xorg-x11-drv-intel?
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--- Comment #158 from Chris Wilson <chris@chris-wilson.co.uk> ---
(In reply to comment #157)
> In regards to comment 145, is it recommended to use SNA? We are not using
> SNA and have seen GPU hangs on the 845G. Is it better to use SNA and apply
> the SNA patch to xorg-x11-drv-intel?
comment 145 is stale, superseded by the genuine fixes in comments 152 and 153.
I would recommend using SNA on gen2 as UXA pales in comparison.
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--- Comment #159 from György Balló <ballogy@freestart.hu> ---
Something is broken in the 3.8 kernel. When I'm using it, the colour depth is
low, and my system freezes when I try to suspend the computer. I don't know if
it caused by the applied workaround or not, but the problem gone if I downgrade
to kernel version 3.7.
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--- Comment #160 from Jani Nikula <jani.nikula@intel.com> ---
(In reply to comment #159)
> Something is broken in the 3.8 kernel. When I'm using it, the colour depth
> is low, and my system freezes when I try to suspend the computer. I don't
> know if it caused by the applied workaround or not, but the problem gone if
> I downgrade to kernel version 3.7.
Please file a new bug with a detailed description of your symptoms instead of
cluttering this one.
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Ленар <zinnurov.snab-smustroitel@mail.ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
i915 platform| |ALL
Hardware|x86 (IA32) |All
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