[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

Bjorn Helgaas <bhelgaas@google.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bhelgaas@google.com
          Component|PCI                         |Video(DRI - non Intel)
           Assignee|drivers_pci@kernel-bugs.osd |drivers_video-dri@kernel-bu
                   |l.org                       |gs.osdl.org

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com

--- Comment #6 from Alex Deucher <alexdeucher@gmail.com> ---
Can you bisect?

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #7 from Bruno Wolff III <bruno@wolff.to> ---
It will go slow, as I'll only be able to do about one build a day as I have
pretty old hardware. It will also be slow getting started as I haven't tried it
before and I'll need to figure out the workflow. On the plus side the number of
commits isn't huge, so I can probably get it done in a few weeks.

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

Dieter Nützel <Dieter@nuetzel-hh.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |Dieter@nuetzel-hh.de

--- Comment #8 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
(In reply to Alex Deucher from comment #6)
> Can you bisect?

Hello Alex,

I'll try 'cause I get the same with clean 3.12-rc2 +
0001-drm-radeon-avoid-UVD-corruption-on-AGP-cards-using-G.patch

radeon.agpmode=8 works as before, but
radeon.agpmode=-1 gave

[-]
[   10.958649] radeon: `-1' invalid for parameter `agpmode'
[   11.515274] radeon: `-1' invalid for parameter `agpmode'
FATAL: Error inserting radeon
(/lib/modules/3.12.0-rc2-1-desktop/kernel/drivers/gpu/drm/radeon/radeon.ko):
Invalid argument

Welcome to openSUSE 12.3 "Dartmouth" - Kernel 3.12.0-rc2-1-desktop (tty1).
[-]

Your drm-fixes-3.12 (3.11.0-rc7 in reality) +
0001-drm-radeon-avoid-UVD-corruption-on-AGP-cards-using-G.patch
works like a charm.

Any point to start without git-tree?

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #9 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
Created attachment 109551
  --> https://bugzilla.kernel.org/attachment.cgi?id=109551&action=edit
dmesg-3.12-rc2-agpmode-1.log

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

Dieter Nützel <Dieter@nuetzel-hh.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #109551|application/octet-stream    |text/plain
          mime type|                            |

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #10 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Dieter Nützel from comment #8)
> (In reply to Alex Deucher from comment #6)
> > Can you bisect?
> 
> Hello Alex,
> 
> I'll try 'cause I get the same with clean 3.12-rc2 +
> 0001-drm-radeon-avoid-UVD-corruption-on-AGP-cards-using-G.patch
> 
> radeon.agpmode=8 works as before, but
> radeon.agpmode=-1 gave
> 
> [-]
> [   10.958649] radeon: `-1' invalid for parameter `agpmode'
> [   11.515274] radeon: `-1' invalid for parameter `agpmode'
> FATAL: Error inserting radeon
> (/lib/modules/3.12.0-rc2-1-desktop/kernel/drivers/gpu/drm/radeon/radeon.ko):
> Invalid argument
> 

We haven't touched anything AGP related in radeon in years.  Maybe some general
kernel module parsing change?

> 
> Any point to start without git-tree?

You really need a git tree to bisect.

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #11 from Bruno Wolff III <bruno@wolff.to> ---
I believe it was after d5d04bb and up to 3711d86. There weren't any radeon
changes in that range that I noticed when I read through the git whatchanged
output. It's possible that some patch was added or removed in there, but there
wasn't a comment in the spec changelog for the rpms. I can check more carefully
to make sure. There were some intel changes and maybe there is some common
code.

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #12 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
(In reply to Alex Deucher from comment #10)
> (In reply to Dieter Nützel from comment #8)
> > (In reply to Alex Deucher from comment #6)
> > > Can you bisect?
> > 
> > Hello Alex,
> > 
> > I'll try 'cause I get the same with clean 3.12-rc2 +
> > 0001-drm-radeon-avoid-UVD-corruption-on-AGP-cards-using-G.patch
> > 
> > radeon.agpmode=8 works as before, but
> > radeon.agpmode=-1 gave
> > 
> > [-]
> > [   10.958649] radeon: `-1' invalid for parameter `agpmode'
> > [   11.515274] radeon: `-1' invalid for parameter `agpmode'
> > FATAL: Error inserting radeon
> > (/lib/modules/3.12.0-rc2-1-desktop/kernel/drivers/gpu/drm/radeon/radeon.ko):
> > Invalid argument
> > 
> 
> We haven't touched anything AGP related in radeon in years.

I know. ;-)

>  Maybe some general kernel module parsing change?

That was my thought, too.

> > 
> > Any point to start without git-tree?
> 
> You really need a git tree to bisect.

I know, second time, but...
...I'll see what I can find in Linus 3.12-rc1 (maybe before) patch file(s)
(logs).
For several git trees this system is to small...

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #13 from Bruno Wolff III <bruno@wolff.to> ---
Kernel kernel-PAE-3.12.0-0.rc0.git22.2.fc21.i686 which worked for me was based
off commit d5d04bb. The next kernel which didn;t work
(kernel-PAE-3.12.0-0.rc0.git24.1.fc21.i686) was based on commit 3711d86.

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

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https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #14 from Bruno Wolff III <bruno@wolff.to> ---
After a bit of learning, I believe I am on my way to bisecting for the problem
commit. I can only do 2 tests a day (maybe 3 on weekends) and will probably
finish on Monday.

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #15 from Bruno Wolff III <bruno@wolff.to> ---
So far I have 26935fb06ee88f1188789807687c03041f3c70d9 as the last known good
commit and 48efe453e6b29561f78a1df55c7f58375259cb8c as the first known bad
commit.
Of the commits there, the most suspicious ones have to do with the
strict_strto*() to kstrto*() change as it looks like that might affect
parameter parsing. This would be commits
6072ddc8520b86adfac6939ca32fb6e6c4de017a and
57103d7fe1833857cf542a482c1eb8da0bf86e5d.
I still expect to have the bisect done by sometime on Monday (or maybe late
Sunday).

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

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https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #16 from Michel Dänzer <michel@daenzer.net> ---
Someone who has the necessary powers please reassign according to
https://lists.ozlabs.org/pipermail/linuxppc-dev/2013-September/111758.html .

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

Bjorn Helgaas <bhelgaas@google.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |khali@linux-fr.org

--- Comment #17 from Bjorn Helgaas <bhelgaas@google.com> ---
Bruno or Dieter, can you try Jean's patch from the email mentioned in comment
#16?  If v3.12-rc2 + Jean's patch solves the problem, it might save you a lot
of bisect time.

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

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https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #18 from Bruno Wolff III <bruno@wolff.to> ---
I'll be able to try it tonight or tomorrow.

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

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https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #19 from Bruno Wolff III <bruno@wolff.to> ---
I tested the referenced patch on top of vanilla 3.12-rc2 and things work
correctly.

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #20 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
(In reply to Bjorn Helgaas from comment #17)
> Bruno or Dieter, can you try Jean's patch from the email mentioned in
> comment #16?  If v3.12-rc2 + Jean's patch solves the problem, it might save
> you a lot of bisect time.

3.12-rc2 + Jean's patch

Running with radeon.agpmode=-1.
Direct way to 3.12-rc3, please ;-)

Tested-by Dieter@nuetzel-hh.de

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

Bruno Wolff III <bruno@wolff.to> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |CODE_FIX

--- Comment #21 from Bruno Wolff III <bruno@wolff.to> ---
This is fixed by commit 3a126f85e015701e56240884f27f97543580d5f7 which is in
Linus' tree. It is also in Fedora kernel-PAE-3.12.0-0.rc2.git4.1.fc21.i686
which I tested and confirmed the fix again.

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #22 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
(In reply to Bruno Wolff III from comment #0)
> I need to use radeon.agpmode=-1 with my rv280 based graphics card due to a
> long (2+ years) standing bug with the driver.

Hello Bruno,

isn't it then time to writing a bug report on bugs.freedesktop.org, that
Christian König or Alex Deucher from AMD can look at it?

Greetings,
   Dieter

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[Bug 61811] kms mode breaks when using radeon.agpmode=-1

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=61811

--- Comment #23 from Bruno Wolff III <bruno@wolff.to> ---
I have a Fedora bug for that issue. I'm starting to work on bisecting some
older kernel bugs and may bring it back to the kernel when I'm done. But I'm
starting on a sound / network / probable locking bug from 3 years ago. It will
probably take me a couple of weeks to get that one bisected.

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