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Old 08-24-03, 09:07 PM   #1
mac
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Default XVideo ext -> image shearing/corruption

I'm using the 1.0.4496 drivers, and still having an annoying problem: when using XVideo extension for display in most programs that support it, like xine, mplayer, etc, the image is corrupted: it looks like the image is somewhat sheared, or rather every other lines of the image is shifted a small but significant amount, making it unwatchable. I've realized though that this occurs only once the window occupies a certain amount of area (or is it past a certain width?); small windows do not display this problem, but fullscreen views always do. In fact, it is hard to pintpoint EXACTLY at which point this starts happening, as well as what factors cause a greater effect. I've noticed that if I drop down the resolution using Ctrl+Alt+"grey +", and start shifting the viewport, the effect occurrs if the window fills the screen, but disappears once one of the window borders becomes visible. Very odd.

Has anyone seen this and found the cause?

Info:

driver: 1.0.4496
distro: Debian unstable
Model: GeForce4 Ti 4200 with AGP8X
Video BIOS: 04.28.20.05.11
Processor: P4 2.4GHz
mobo: ASUS P4S8X
display: ViewSonic VX900 (LCD, connected using digital port, not VGA, 1280x1024)
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Old 09-06-03, 12:06 PM   #2
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I've exactly the same Problem:
GeForce 4 Mx 440 Digitally connected to a Samsung TFT @ 1280x1024.
Please can somebody fix that!
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Old 09-06-03, 09:34 PM   #3
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It it a bug in 4496 ? I am using 4349. It don't have such a problem. My card is GF2 MX 400.
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Old 09-12-03, 05:05 PM   #4
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Quote:
Originally posted by eliu
It it a bug in 4496 ? I am using 4349. It don't have such a problem. My card is GF2 MX 400.
I tried 3 latest versions of the drivers (so, including 4349), and all give the same result.

Out of curiousity, are you displaying on an LCD screen? I'm wondering if that's part of the problem... I lugged my CRT to the box with the card, but it seems it doesn't put out a signal on the VGA connector, even though I disconnected the DVI. Perhaps it detects this at box powerup time...
frustrating...

Last edited by mac; 09-12-03 at 05:22 PM.
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Old 09-12-03, 05:32 PM   #5
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Quote:
Originally posted by Tirador
I've exactly the same Problem:
GeForce 4 Mx 440 Digitally connected to a Samsung TFT @ 1280x1024.
Please can somebody fix that!
Did you file a bug report? I did, twice, but have heard nothing from nvidia, not even an automated "thanks for your bug report, here's something to check". Wondering if you're having a similar experience. Getting really frustrated with this issue, and nvidia's non-responsiveness.
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Old 09-13-03, 03:42 AM   #6
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My LCD is connected to D-SUB (analog).

Probably it is a DVI only bug.
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Old 09-19-03, 12:10 PM   #7
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I write a new Bug Report to Nvidia.
It's getting on my nerves...
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Old 09-23-03, 10:09 AM   #8
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Ive found out that I had the same problems with the XFree86 nv driver. I made a Bug Report to XFree86, but they already found that bug. Switch to CVS or xfree-4.3.99.12 and everything works fine!
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Old 09-24-03, 01:17 PM   #9
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Quote:
Originally posted by Tirador
Ive found out that I had the same problems with the XFree86 nv driver. I made a Bug Report to XFree86, but they already found that bug. Switch to CVS or xfree-4.3.99.12 and everything works fine!
Woo hoo! Darn, now if only Debian wasn't so slow on the uptake of newer versions of xfree86... (although I can understand why they are, sigh). Ah well, maybe I can patch the 4.2.1 version it uses...

Heh, just had an email exchange with Mark Vojkovich from XFree86, and apparently there is *no* support for digital flat panels in XFree86 versions lower than 4.3, so that could be part of the problem...

Last edited by mac; 09-24-03 at 02:32 PM.
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Old 09-24-03, 04:51 PM   #10
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I have the same problem here when I connect my lcd with a dvi cable. I remember somebody saying that it went away or decreased if you lowered the refresh rate on the monitor. Try 60Hz or somesuch. This is obviously not a fix but it might help.

I can't use the dvi connector because it causes problems with my tv-out and I don't see this problem with a vga cable.

PS.
You have to restart X if you change connectors. Reboot the machine to get the console back if you use startx.
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Old 10-11-03, 08:00 PM   #11
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Hmmm i' ve got the same problem here with my tnt2 m64 pci. I'am using
Xfree86 4.3.0-r2
Nvidia driver 1.0.4496
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Old 10-12-03, 11:08 AM   #12
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Quote:
Originally posted by nimbus
Hmmm i' ve got the same problem here with my tnt2 m64 pci. I'am using
Xfree86 4.3.0-r2
Nvidia driver 1.0.4496
Well, the key thing is that you are probably using a digital flat panel, right? As mentioned above, problem should be fixed in CVS version or 4.3.99.12 or higher...
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