[Bug 39121] New: Random black shaped artifacts in gnome-shell

[Bug 39121] New: Random black shaped artifacts in gnome-shell

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=39121

           Summary: Random black shaped artifacts in gnome-shell
           Product: Mesa
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/Gallium/r600
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: vljn@ovi.com


Created an attachment (id=48943)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=48943)
Picture of an artifact

Hi

There are some black shaped artifacts occuring over window on gnome-shell.
I managed to record a video and extract an image displaying such an artifact.

This bug is not deterministic, however it is very frequent : to make it
appears, I only moved a terminal window on the bottom edge of the screen.

Note that this bug is not specific to gnome-shell, it also appears on kwin
effect in kde, and in others circumstance in gnome-shell, but the scenario
described above is the easiest to reproduce.

My hardware is AMD Zacate E350 (evergreen based), using Mesa 7.11 rc1 (bug is
also in 7.10.x) on opensuse 11.4 64bits(is also on Fedora 15), with r600g
drivers, libdrm 2.4.26 and ati ddx 14.2, kernel 2.6.39.

Vincent

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[Bug 39121] Random black shaped artifacts in gnome-shell

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https://bugs.freedesktop.org/show_bug.cgi?id=39121

--- Comment #1 from Alex Deucher <agd5f@yahoo.com> 2011-07-10 15:22:23 PDT ---
Please attach your xorg log and config and dmesg output.

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[Bug 39121] Random black shaped artifacts in gnome-shell

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https://bugs.freedesktop.org/show_bug.cgi?id=39121

--- Comment #2 from vincent <vljn@ovi.com> 2011-07-11 04:30:01 PDT ---
Created an attachment (id=48966)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=48966)
dmesg output

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[Bug 39121] Random black shaped artifacts in gnome-shell

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https://bugs.freedesktop.org/show_bug.cgi?id=39121

--- Comment #3 from vincent <vljn@ovi.com> 2011-07-11 04:30:35 PDT ---
Created an attachment (id=48967)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=48967)
Xorg.log

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[Bug 39121] Random black shaped artifacts in gnome-shell

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https://bugs.freedesktop.org/show_bug.cgi?id=39121

--- Comment #4 from vincent <vljn@ovi.com> 2011-07-11 04:31:03 PDT ---
Created an attachment (id=48968)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=48968)
xorg.conf

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[Bug 39121] Random black shaped artifacts in gnome-shell

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https://bugs.freedesktop.org/show_bug.cgi?id=39121

--- Comment #5 from vincent <vljn@ovi.com> 2011-07-11 04:33:22 PDT ---
Here they are.

Please note that Gnome screencast (ctrl + alt + shift + r) does not record the
issue. That's why I used my smartphone to record the video (and explain
blurryness...beware it records at 25 fps on a 60 fps screen, frames can be
blended by the recorder device)

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[Bug 39121] Random black shaped artifacts in gnome-shell

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https://bugs.freedesktop.org/show_bug.cgi?id=39121

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #48966|text/x-log                  |text/plain
          mime type|                            |
  Attachment #48966|0                           |1
           is patch|                            |

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[Bug 39121] Random black shaped artifacts in gnome-shell

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https://bugs.freedesktop.org/show_bug.cgi?id=39121

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #48967|text/x-log                  |text/plain
          mime type|                            |
  Attachment #48967|0                           |1
           is patch|                            |

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[Bug 39121] Random black shaped artifacts in gnome-shell

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https://bugs.freedesktop.org/show_bug.cgi?id=39121

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #48968|application/octet-stream    |text/plain
          mime type|                            |
  Attachment #48968|0                           |1
           is patch|                            |

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[Bug 39121] Random black shaped artifacts in gnome-shell

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https://bugs.freedesktop.org/show_bug.cgi?id=39121

--- Comment #6 from Alex Deucher <agd5f@yahoo.com> 2011-07-11 05:59:56 PDT ---
Do either of the following options help (put them in the device section of your
xorg config)?

Option "EnablePageFlip" "False"
Option "ColorTiling" "True"

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[Bug 39121] Random black shaped artifacts in gnome-shell

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--- Comment #7 from vincent <vljn@ovi.com> 2011-07-11 06:13:09 PDT ---
Disabling EnablePageFlip indeed solves the issue.

Is it a bug from page flipping or an "expected" behaviour ?

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[Bug 39121] Random black shaped artifacts in gnome-shell

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https://bugs.freedesktop.org/show_bug.cgi?id=39121

--- Comment #8 from Alex Deucher <agd5f@yahoo.com> 2011-07-11 06:20:36 PDT ---
It's a bug.  Please try the latest 3.0 drm-fixes branch in Dave's kernel repo
to see if it works any better:
http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=shortlog;h=refs/heads/drm-fixes

There are several pageflipping related fixes since 2.6.39.

Specifically:
http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=commitdiff;h=b7eff394670366a42935bfbaef67a6f7185627d7
http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=commitdiff;h=498c555f56a02ec1059bc150cde84411ba0ac010

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[Bug 39121] Random black shaped artifacts in gnome-shell

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https://bugs.freedesktop.org/show_bug.cgi?id=39121

vincent <vljn@ovi.com> changed:

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

--- Comment #9 from vincent <vljn@ovi.com> 2011-07-11 16:29:20 PDT ---
Sorry for the delay (compiling a kernel is time consuming).

I applied both patches to 2.6.39 kernel and it solved the issue. Thank.

Are they going upstream in kernel 3.0 ?

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