[Bug 36608] New: Corrupt GL rendering

[Bug 36608] New: Corrupt GL rendering

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=36608

           Summary: Corrupt GL rendering
           Product: Mesa
           Version: git
          Platform: IA64 (Itanium)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/Gallium/r300
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: emeric.maschino@gmail.com


Created an attachment (id=46090)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=46090)
Screenshot showing corrupt GL rendering in glxgears as an example

Hi,

I was asked there (http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=622299#67)
to report this bug upstream.

GL rendering is currently corrupt on IA-64 with Gallium r300 driver (cf.
attached screenshot with running glxgears as an example). Classic driver
renders display correctly.

Regards,

    Émeric

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[Bug 36608] Corrupt GL rendering

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=36608

--- Comment #1 from Michel Dänzer <michel@daenzer.net> 2011-05-09 06:57:44 PDT ---
Does current Git master work better? At least some of the Gallium code was not
detecting the endianness of this architecture correctly.

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[Bug 36608] Corrupt GL rendering

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=36608

Émeric Maschino <emeric.maschino@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #46090|0                           |1
        is obsolete|                            |

--- Comment #2 from Émeric Maschino <emeric.maschino@gmail.com> 2011-08-18 16:25:00 PDT ---
Created an attachment (id=50365)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=50365)
Screenshot showing correct GL rendering in glxgears with current Git master
(7.12-devel (git-ccecc08))

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[Bug 36608] Corrupt GL rendering

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=36608

--- Comment #3 from Émeric Maschino <emeric.maschino@gmail.com> 2011-08-18 16:26:43 PDT ---
(In reply to comment #1)
> Does current Git master work better? At least some of the Gallium code was not
> detecting the endianness of this architecture correctly.

Hi Michel,

Sorry for the very late reply!

But it was worth waiting for it: I just finished recompiling current Git master
(Mesa 7.12-devel (git-ccecc08)). As you can see in the attached screenshot,
glxgears now renders correctly :-)

I don't know though if 3D hardware acceleration is fully working: I get no
particular warning/error in dmesg or Xorg.0.log, but glxgears FPS seem very low
to me (~85 FPS).

     Émeric

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[Bug 36608] Corrupt GL rendering

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=36608

--- Comment #4 from Michel Dänzer <michel@daenzer.net> 2011-08-19 00:30:40 PDT ---
(In reply to comment #3)
> I don't know though if 3D hardware acceleration is fully working: I get no
> particular warning/error in dmesg or Xorg.0.log, but glxgears FPS seem very low
> to me (~85 FPS).

As the glxgears output explains, it synchronizes to the refresh rate by
default, so that may be okay. Check the glxinfo output, and maybe try

vblank_mode=0 glxgears

to disable synchronization.

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[Bug 36608] Corrupt GL rendering

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=36608

Émeric Maschino <emeric.maschino@gmail.com> changed:

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

--- Comment #5 from Émeric Maschino <emeric.maschino@gmail.com> 2011-09-12 11:35:51 PDT ---
(In reply to comment #4)
> As the glxgears output explains, it synchronizes to the refresh rate by
> default, so that may be okay. Check the glxinfo output, and maybe try
> 
> vblank_mode=0 glxgears
> 
> to disable synchronization.

That's it. Without synchronization, I'm getting ~1700 FPS.
I also gave ioQuake3-based Debian "Wheezy" Testing quake3 a try. Ran
flawlessly.

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