Nouveau - Jul 2008 - [Bug 16782] New: Light graphical corruption in Firefox/Iceweasel

http://bugs.freedesktop.org/show_bug.cgi?id=16782

           Summary: Light graphical corruption in Firefox/Iceweasel
           Product: xorg
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: screwtape at froup.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=17767)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=17767)
A screenshot of a glitch in action.

The nouveau driver was added to the Debian experimental repository the other
day[1], so I decided to try it out. So far, it's working better than nv, but
I've experienced some light graphical corruption in Iceweasel (Debian's
build
of Firefox). It's superficially similar to some corruption I saw with the
"nv"
driver[2], but that seemed to be XAA-specific while I hear nouveau is an
EXA-based driver.

I'll attach a screenshot of the problem, but in general background-images
seem
to paint with the wrong origin - sometimes the edges of a web-page will paint
in the middle, sometimes the background won't be drawn at all. Selecting
text
then deselecting it often repairs the damage (or sometimes causes it).

My video-card is a GeForce FX 5200 Ultra ("NV34", says Xorg.0.log),
I'm running
Debian Unstable on a PowerMac G5, I'm using Metacity with compositing
disabled;
other system info includes:

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'stable'), (499,
'experimental')
Architecture: powerpc (ppc64)

Kernel: Linux 2.6.25-2-powerpc64 (SMP w/1 CPU core)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages xserver-xorg-video-nouveau depends on:
ii  dr 2.3.1+git+20080706+401f77a-1+2.6.25-7 DRM modules for Linux (kernel 2.6.
ii  li 2.7-12                                GNU C Library: Shared libraries
ii  xs 2:1.4.2-1                             Xorg X server - core server

I've attached a screenshot of the glitch in action; this occurred during
page
load and occasionally while I was resizing the window. It took me a while to
get this screenshot, as defocusing the window was enough to make it redraw and
clean itself up.

[1]:
http://chris-lamb.co.uk/2008/07/16/nouveau-nvidia-drivers-now-available-in-debian-experimental/
[2]: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=482992


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--- Comment #1 from Michel D?nzer <michel at tungstengraphics.com> 
2008-07-20 07:18:38 PST ---
Please try a newer X server, e.g. xserver-xorg-core from Debian experimental
(though you may need to rebuild the driver against that).


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--- Comment #2 from Tim Allen <screwtape at froup.com>  2008-07-21
05:19:45 PST ---
Unfortunately, experimental seems to currently be set up such that I can use
nouveau with the old version of xserver-xorg-core, or nv with the new version
of xserver-xorg-core, but not nouveau with the new xserver-xorg-core.

I guess I'll put up with the glitch until newer packages are available for
testing.


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--- Comment #3 from Danny <obiwan at mailmij.org>  2008-07-22 01:38:19 PST
---
just build nouveau from git for a while?

d.


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--- Comment #4 from Pekka Paalanen <pq at iki.fi>  2009-09-23 05:06:48 PST
---
How is it today?

I'm not sure how old the Dedian packaging is, so testing with all Nouveau
components from git is recommended with either the latest released xorg-server
or git head.


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--- Comment #5 from Tim Allen <screwtape at froup.com>  2009-09-23
19:47:37 PST ---
It's been a while since I owned the computer I was using when I filed this
bug,
so I'm afraid I can't test it anymore.

My recollection is that there was some kind of bug in the X server pixmap
rendering that libcairo was tickling; Mozilla hacked up their internal copy of
libcairo to work around the bug, but the Debian folks built Iceweasel against
the official libcairo release.

A reference to the problem on the Debian Iceweasel maintainer's blog:

    http://glandium.org/blog/?p=209

The Mozilla bug in which they hack up their libcairo source:

    https://bugzilla.mozilla.org/show_bug.cgi?id=413583#c3

So although I don't know the current state of the actual underlying bugs, it
does seem to have workarounds in place, and it doesn't seem to be
nouveau's
fault.


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Pekka Paalanen <pq at iki.fi> changed:

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




--- Comment #6 from Pekka Paalanen <pq at iki.fi>  2009-09-24 09:45:59 PST
---
Excellent, thank you for this information.
Let's close this bug.


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