Description of problem: There are two symptoms - not sure if they're related. The first is that a visual bell in an xterm draws VERY slowly. Using a small font and a full-screen'd xterm, the bell could take a full two seconds (or more) to propagate from the top to the bottom. Running "screen" in that same xterm side-steps the problem. (It's a viable work-around - but it means running screen sessions in all of my terminals.) The second (related?) issue is that certain display methods do not render properly on the bottom half of my screen. I'm running an old video card ("nVidia Corporation NV34GL [Quadro FX 500/600 PCI] (rev a1)") using the nouveau driver in a dual-headed config. I also run fvwm2. (But I confirmed the problem exists in Gnome.) I first noticed that my most of my applications, when iconified, did not show the icon properly. You saw a an outline where the image should be and, otherwise, the background image/texture where the icon should be. And then I noticed, by accident, that if I moved the icon above a particular line in the screen it's like it's being revealed. I was able to produce the same issue by playing a video using mplayer. If the video straddles the line the bottom half is NOT rendered (freezes at a previous frame) while the top half continues to update. This happens with mplayer when using the "xv" and "sdl" drivers, but not using gl or gl2 as the driver. Then it works properly. On a lark, I was playing with the driver options for nouveau, and setting ShadowFB to be true also "fixes" the problem, but then video renders INSANELY slow and xvinfo shows no X-Video Extension available. (That probably makes sense to people who understand displays better than I do, but I wasn't sure if it offered useful information or not.) Version-Release number of selected component (if applicable): xorg-x11-drv-nouveau-0.0.16-27.20110720gitb806e3f.fc16.i686 How reproducible: mplayer -vo sdl video.file then move the window in part or in whole to the lower half of the screen. (Or full-screen the video. Actually, trying *that* just killed my second monitor - that is my desktop now thinks I only have one display screen. :/ )
mplayer -vo xv file will also produce the faulty result.
Confirmed on updated F16 i386, xorg-x11-drv-nouveau-0.0.16-27.20110720gitb806e3f.fc16.i686 01:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 5200] (rev a1) The bottom half of the screen appears to be clipped away in some paint operations. KDE is OK with desktop effects off, but misses bottom-half redraws with effects on. The problem is also evident with kaffeine or mplayer -vo xv, but not with mplayer -vo x11. It looks like some kind of accelerated drawing operations are clipped at one half of the screen. This is happening with a single 1920x1080 screen and no xorg.conf file. I'm available for testing patches.
Still no improvement with xorg-x11-drv-nouveau-0.0.16-28.20120321gitab7291d from koji.
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Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.
Please re-open against F17 - problem still exists.
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Fedora 17 changed to end-of-life (EOL) status on 2013-07-30. Fedora 17 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.
Confirmed - problem of slow redraw for visual bell still exists in Fedora 18. Other problem can't be confirmed as that hardware has been decommissioned. Adam
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Definitely still a problem in Fedora 19.
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Fedora 19 changed to end-of-life (EOL) status on 2015-01-06. Fedora 19 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.