Re: [gentoo-user] NVidia-drivers: Sync problem ???

Dale <rdalek1967@×××××.com> [10-12-18 09:52]:
> meino.cramer@×××.de wrote:
> >Hi,
> >
> >For my MSI GT430 (nvidia) graphics card I am using
> >the x11-drivers/nvidia-drivers-260.19.29.
> >
> >But there seems to be something wrong:
> >When playing videos with faster movements
> >I see heavy distortions around these parts
> >of the screen.
> >
> >Previously I fixed this for another nvidia
> >card by enabling different sync options
> >in the nvidia-setting dialog and was happy
> >that these distortion dont come back, when
> >I switched to this newer card.
> >
> >Now: There're back despite my hopes...
> >
> >I started glxgears and got this output
> >on the console:
> >
> >     Running synchronized to the vertical refresh.  The framerate
> >should be
> >     approximately the same as the monitor refresh rate.
> >     74062 frames in 5.0 seconds = 14812.268 FPS
> >     77502 frames in 5.0 seconds = 15500.350 FPS
> >     XIO:  fatal IO error 11 (Resource temporarily unavailable) on X
> >server ":0.0"
> >         after 57 requests (57 known processed) with 0 events
> >remaining.
> >
> >
> >The second sentence say, that there is a syncing active and will get
> >the refresh rate of the monitor (a LCD screen) back. This wouild be
> >around 60Hz as far as I know.
> >
> >And then, the measurements show 15500.350 FPS...
> >
> >Which slightl above 60 Hz....
> >
> >To sync or not to sync, that seems to be the question...
> >
> >By the way: Distortion can be watched as when using mplayer
> >as with vlc. I recompiled both just to get sure, but it does
> >not help. The machine is definetly fast enough to play videos
> >(AMD Phenom II X6 1090T)....
> >
> >How can I get back the undistorted screen?
> >
> >Thank you very much in advance for any help !
> >Best regards,
> >mcc
> >
> >
>
> I would check the log files and see if they shed some light on this.  I
> would check dmesg, messages and Xorg.0.log as well.  The last one may
> show the best clues.  If nothing there points to anything good, I would
> post the xorg.conf and Xorg.0.log as attachments.
>
> I have a CPU like yours except 4 core and a little GT-220 card, wimpy
> compared to yours.  What you see about the refresh rates is displayed
> on my machine too.  The last part appears because you hit the close
> window X instead of doing a ctrl c to stop glxgears.  If you start
> glxgears and do a ctrl c to stop it, the last part won't be there.   I
> mention this because that *may* have nothing to do with the problem you
> are having.  This is what happens when I run glxgears:
>
> fireball ~ # glxgears
> Running synchronized to the vertical refresh.  The framerate should be
> approximately the same as the monitor refresh rate.
> 27770 frames in 5.0 seconds = 5553.918 FPS
> 9783 frames in 5.0 seconds = 1955.847 FPS
> 3084 frames in 5.0 seconds = 616.716 FPS
> 3085 frames in 5.0 seconds = 616.942 FPS
> 3105 frames in 5.0 seconds = 620.981 FPS
> XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server
> ":0.0"
>       after 42 requests (42 known processed) with 0 events remaining.
> fireball ~ # glxgears
> Running synchronized to the vertical refresh.  The framerate should be
> approximately the same as the monitor refresh rate.
> 14932 frames in 5.0 seconds = 2985.639 FPS
> 3011 frames in 5.0 seconds = 602.125 FPS
> ^C
> fireball ~ #
>
> The last one was stopped with a ctrl c as you can see.  The first was
> closed by hitting the close window button.
>
> If this doesn't help, at least you know to post the files so we can
> look them over.  Maybe someone will notice something out of place.
>
> Dale
>
> :-)  :-)
>

Hi Dale,

thank you for your in deep explanations ! :)

The distortions I saw on my screen look identical to
those I recognizeed with my old nvidia card before using
the sync settings...so i /thought/ (read: "dont know for sure" ;) )
it would by a syncing problem again.

But it wan't.

For reasons I dont know in the nvidia-settings there was "GPU scaling"
activate. May be someone sitting in front of my computer the same time
I use to has fiddled with this setting without informing me... ;)

The trick is: When watching a video in its native resolution, the
problem does not occur.

When watching the video full screen, the GPU was instructed to scale
it up (instead of mplayer or vlc doing this job in software).
Problem with this is (I thinkt), that there is one-pixel-border around
the full-screen window of mplayer/vlc so the GPU is instructed to
scale it to 1918x1199 pixel. Then this is thrown into my LCD monitor
and .... rubish...

First I deatcivated "GPU scaling" and then spoke some serious words
to this guy, who uses my computer always the same I do and ... I am
happy again to have a clean video playing.

Thanks a lot for your explanations! (will store them for later use...
who knows what things I will encounter next....;)

Have a nice weekend!
Best regards
mcc