Created attachment 17767 [details] 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
Please try a newer X server, e.g. xserver-xorg-core from Debian experimental (though you may need to rebuild the driver against that).
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.
just build nouveau from git for a while? d.
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.
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.
Excellent, thank you for this information. Let's close this bug.
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