[Bug 54129] New: [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

[Bug 54129] New: [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=54129

             Bug #: 54129
           Summary: [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250
    Classification: Unclassified
           Product: DRI
           Version: unspecified
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: mariofutire@googlemail.com


Created attachment 66187
  --> https://bugs.freedesktop.org/attachment.cgi?id=66187
Screenshot of bad rendering

I run Fedora 17 and since they have shipped a kernel 3.5.X I have a lot of
artefacts when I log in KDE.

Kernel 3.4.6 works ok.

My hardware in a Thinkpad laptop with a 

01:00.0 VGA compatible controller: ATI Technologies Inc Radeon RV250 [Mobility
FireGL 9000] (rev 02)

and I load the R200 microcode.

Basically, as soon as I log on KDE I have a lot of rectangular areas which are
left black.
They are 100% reproducible always with the same pattern (at least in the few
seconds before I logoff again), and they move around when I click or windows
are displayed.

If I pass the option radeon.modeset=0 to the kernel (in grub) there are no
artefacts, but of course XV support is not there so this is not really an
option as video player struggle a lot.

I managed to bisect the issue to the following commits:

bad ========= 3b7a2b2 drm/radeon: rework fence handling, drop fence list v7
skip ======== bb63556 drm/radeon: convert fence to uint64_t v4
good ======== d6999bc drm/radeon: replace the per ring mutex with a global one

"skip" here means that the kernel does not boot: after the linux penguin logo
is displayed on the top left of the screen, nothing else happens, even though I
am able to reboot pressing Ctrl-Alt-Del.

So there are 2 commits that could be responsible.

Please, let me know if there is anything I can provide on top of that.

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[Bug 54129] [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=54129

--- Comment #1 from Andrea <mariofutire@googlemail.com> 2012-08-27 19:38:34 UTC ---
Created attachment 66188
  --> https://bugs.freedesktop.org/attachment.cgi?id=66188
Other example of bad rendering

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[Bug 54129] [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=54129

Andrea <mariofutire@googlemail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=51344,
                   |                            |https://bugzilla.redhat.com
                   |                            |/show_bug.cgi?id=845639

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[Bug 54129] [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=54129

--- Comment #2 from Jerome Glisse <glisse@freedesktop.org> 2012-08-27 20:19:04 UTC ---
Does kernel patch :

http://people.freedesktop.org/~glisse/0001-drm-radeon-extra-type-safe-for-fence-emission.patch

Helps ?

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[Bug 54129] [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

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https://bugs.freedesktop.org/show_bug.cgi?id=54129

--- Comment #3 from Jerome Glisse <glisse@freedesktop.org> 2012-08-27 20:26:33 UTC ---
Also can you test if booting with radeon.no_wb=1 fix the issue ?

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[Bug 54129] [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

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https://bugs.freedesktop.org/show_bug.cgi?id=54129

--- Comment #4 from Andrea <mariofutire@googlemail.com> 2012-08-28 20:26:30 UTC ---
(In reply to comment #3)
> Also can you test if booting with radeon.no_wb=1 fix the issue ?

this did not make any difference
(tested on v3.6-rc3 where the problems still exists)

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[Bug 54129] [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

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https://bugs.freedesktop.org/show_bug.cgi?id=54129

--- Comment #5 from Andrea <mariofutire@googlemail.com> 2012-08-28 21:06:03 UTC ---
(In reply to comment #2)
> Does kernel patch :
> 
> http://people.freedesktop.org/~glisse/0001-drm-radeon-extra-type-safe-for-fence-emission.patch
> 
> Helps ?

no difference.

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[Bug 54129] [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

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https://bugs.freedesktop.org/show_bug.cgi?id=54129

Simon Kitching <skitching@apache.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |skitching@apache.org

--- Comment #6 from Simon Kitching <skitching@apache.org> 2012-09-03 15:17:38 UTC ---
I also had graphics corruption with a Radeon Mobility X1600 (RV350), and
bisected to exactly the same two patches:
  bb63556 -- hangs on start of Plymouth
  3b7a2b2 -- plymouth works again, but graphics corrupted.

The symptoms were somewhat different than described here: I got shimmery 70s
paisley patterns rather than "black rectangles".


The problem continues up to 3.5.3.
However 3.6.0-rc4 fixes the issue - graphics appear to work fine again.

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[Bug 54129] [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

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https://bugs.freedesktop.org/show_bug.cgi?id=54129

--- Comment #7 from Alex Deucher <agd5f@yahoo.com> 2012-09-03 15:22:43 UTC ---
(In reply to comment #6)
> The problem continues up to 3.5.3.
> However 3.6.0-rc4 fixes the issue - graphics appear to work fine again.

Can you bisect to see what commit fixed the issue?

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[Bug 54129] [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

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https://bugs.freedesktop.org/show_bug.cgi?id=54129

--- Comment #8 from Andrea <mariofutire@googlemail.com> 2012-09-03 20:19:45 UTC ---
(In reply to comment #6)
> I also had graphics corruption with a Radeon Mobility X1600 (RV350), and
> bisected to exactly the same two patches:
>   bb63556 -- hangs on start of Plymouth
>   3b7a2b2 -- plymouth works again, but graphics corrupted.
> 
> The symptoms were somewhat different than described here: I got shimmery 70s
> paisley patterns rather than "black rectangles".
> 
> 
> The problem continues up to 3.5.3.
> However 3.6.0-rc4 fixes the issue - graphics appear to work fine again.

Not here.

I've just tried 3.6-rc4 and I get the same corruptions.

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[Bug 54129] [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

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https://bugs.freedesktop.org/show_bug.cgi?id=54129

Simon Kitching <skitching@apache.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=54662

--- Comment #9 from Simon Kitching <skitching@apache.org> 2012-09-08 06:48:22 UTC ---
Sorry, have to take back that comment about 3.6-rc4+ working; I'm now getting
the "black screen" problem consistently. I was definitely running the right
kernel ("uname -a" was reporting 3.6-rc4+) and can only think that I
accidentally fat-fingered the keyboard and selected the grub "recovery" option
(ie with "nomodeset").

In short: 3.6-rc4+ just boots to a totally black screen for me, due to
something merged in the 3.6-rc series. I've bisected this, and raised a
separate bug (54662) for it. Interestingly, that commit is *also* about "radeon
fence" handling.

I presume that this bug (54129) is still also present and lurking underneath
the black screen - but obviously I can't test that.

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[Bug 54129] [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

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https://bugs.freedesktop.org/show_bug.cgi?id=54129

--- Comment #10 from Alex Deucher <agd5f@yahoo.com> 2012-09-08 15:39:11 UTC ---
Does X load ok if you disable acceleration:

Option "NoAccel" "TRUE"

in the device section of your xorg.conf?

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[Bug 54129] [bisected] Kernel 3.5.0 breaks KMS on Radeon RV250

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Christian König <deathsimple@vodafone.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|dri-devel@lists.freedesktop |deathsimple@vodafone.de
                   |.org                        |

--- Comment #11 from Christian König <deathsimple@vodafone.de> 2012-09-09 09:47:55 UTC ---
Created attachment 66876
  --> https://bugs.freedesktop.org/attachment.cgi?id=66876
Possible fix

Please try the attached patch.

Also please supply the output of "sudo cat
/sys/kernel/debug/dri/0/radeon_fence_info" with and without this patch.

Thx,
Christian.

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