Nouveau - Nov 2009 - [Bug 25275] New: [NV30] Graphical artefacts on PPC64

http://bugs.freedesktop.org/show_bug.cgi?id=25275

           Summary: [NV30] Graphical artefacts on PPC64
           Product: xorg
           Version: 7.4
          Platform: PowerPC
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: bluescarni at gmail.com
         QAContact: xorg-team at lists.x.org


I installed the latest git revision (as of 25/11/2009) of the nouveau driver on
a Gentoo Linux PPC64 (Apple Dual Mac G5) system. The card is an NV34, lspci
reports:

0000:f0:10.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX
5200 Ultra] (rev a1)

The driver seems to work quite well in a dual head configuration LCD monitor +
beamer (recognized as DVI-I-0 and DVI-I-1 by xrandr). 2D performance is really
nice and xrandr seems to work well :)

The only problem is that sometimes minor graphical artefacts pop up, in a more
or less random fashion. Such artefacts include:

- black pixels appearing sometimes at the border of buttons,
- small strangely-coloured stripes in KDE's taskbar and system tray,
- text colour sometimes changing and in some rare cases text disappearing from
graphical widgets.

I was able to capture a couple of such occurrences (see attachments). It seems
like using the option "ExaNoComposite" fixes the problems (but
unfortunately I
was not able to test this configuration extensively). Simply disabling
composite in the server flags does not seem to make a difference.

It seems like issues were already reported on PPC64:

http://bugs.freedesktop.org/show_bug.cgi?id=17571

But that report is rather old, and I'm not sure the information there
contained
is relevant any more.


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--- Comment #1 from Francesco Biscani <bluescarni at gmail.com> 
2009-11-25 04:42:17 PST ---
Created an attachment (id=31465)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=31465)
Graphical glitch in Firefox's preference button.


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--- Comment #2 from Francesco Biscani <bluescarni at gmail.com> 
2009-11-25 04:42:43 PST ---
Created an attachment (id=31466)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=31466)
Graphical glitch in KDE's taskbar.


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--- Comment #3 from Marcin Slusarz <marcin.slusarz at gmail.com> 
2009-11-28 12:27:06 PST ---
I had these glitches on NV34 too, but they disappeared after upgrading
xorg-server from 1.6.x to 1.7.1.

It was on x86-64 and only with gtk2 apps.
gtk-demo reproduced these glitches reliably.


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--- Comment #4 from Francesco Biscani <bluescarni at gmail.com> 
2009-11-28 16:34:44 PST ---
Marcin: not sure it is the same bug you were experiencing. I'm running
xorg-server 1.7.1 and I get artefacts (also) with KDE4/Qt4 apps.


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Ilia Mirkin <imirkin at alum.mit.edu> changed:

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

--- Comment #5 from Ilia Mirkin <imirkin at alum.mit.edu> ---
It appears that this bug report has laid dormant for quite a while. Sorry we
haven't gotten to it. Since we fix bugs all the time, chances are pretty
good
that your issue has been fixed with the latest software. Please give it a shot.
(Linux kernel 3.10.7, xf86-video-nouveau 1.0.9, mesa 9.1.6, or their git
versions.) If upgrading to the latest isn't an option for you, your
distro's
bugzilla is probably the right destination for your bug report.

In an effort to clean up our bug list, we're pre-emptively closing all bugs
that haven't seen updates since 2011. If the original issue remains, please
make sure to provide fresh info, see http://nouveau.freedesktop.org/wiki/Bugs/
for what we need to see, and re-open this one.

Thanks,

The Nouveau Team

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