Screen contamination

[gene heskett]

On Saturday, April 23, 2011 10:35:19 AM dark_mail at gmx.net did opine:

> Am 23.04.2011 02:42, schrieb gene heskett:
> > On Friday, April 22, 2011 08:40:50 PM dark_mail at gmx.net did opine:
> >> Am 22.04.2011 23:00, schrieb gene heskett:
> >>> Greetings folks;
> >>> 
> >>> I have a problem.  Anytime I spend some time watching a news video
> >>> on say fox or cnn's sites, I wind up with screen background
> >>> contamination in my console windows of other workspaces.  Bit and
> >>> pieces show up on the bottom half of such a terminal window, remain
> >>> stationary on the screen as the terminal window is moved about, but
> >>> are constrained by the border when the terminal is moved, but comes
> >>> right back as soon as the terminal windows border encompasses that
> >>> area of the screen again.
> >>> 
> >>> Using FF4.0 and a pclos repo supplied kernel version 2.6.38.2, on
> >>> pclos, on a quad core phenom, 4Gb of dram, and the latest .44
> >>> version of the dkms installed nvidia-current driver on a 9400
> >>> series nvidia card.
> >>> 
> >>> FWIW, I recall seeing that also when I switched to the vesa driver,
> >>> so while it could be related, I am dubious.
> >>> 
> >>> What can I do to facilitate narrowing this down?
> >>> 
> >>> Thanks.
> >> 
> >> I'm by no means an expert, but could you try and disable page
> >> flipping in the xorg.conf or check if it's turned on in the first
> >> place?
> >> 
> >> I ran into a similar looking issue with the switch to kernel 2.6.38,
> >> which introduced KMS page flipping to my graphics card (radeon).
> >> 
> >> Checking for page flipping:
> >> "cat /var/log/Xorg.0.log | grep -i Pageflip"
> >> 
> >> If it's reported as enabled, read on. :-)
> > 
> > It is a null return.
> 
> If you are using Ubuntu, it's logfile probably is /var/log/xorg.0.log
> (notice the lower case 'x')
> 
> >> In your xorg.conf, put the following line in the "Device" section,
> >> reboot and check if the issue appears.
> >> 
> >> 
> >> Section "Device"
> >> 
> >>         Option  "EnablePageFlip"        "off"
> >> 
> >> EndSection
> >> 
> >> If turning it off helps, maybe you're also being hit by bug
> >> https://bugs.freedesktop.org/show_bug.cgi?id=35452
> >> 
> >> This one is about the ati driver, though. So maybe it's unrelated. I
> >> hope I'm being helpful.
> > 
> > I wonder if there is a different name for it when using the nvidia
> > driver?
> > 
> > Thanks.
> 
> I did some digging in the xorg.conf options list and found this:
> 
> Option "NoFlip" "boolean"
> 
I don't have the docs/manpages (pclos, 32 bit, permanent 'rawhide', about 
half of the kde 4.6.2 install just got updated this morning, so I just 
rebooted.)

I just put this line in the Device section of xorg.conf, and will reboot to 
level 3 so I can play with startx.

> The description matches what EnablePageFlip does, except it's reverted,
> which means setting "boolean" to "true" should turn off page flipping.
> See if that makes a difference.

That I will, and report.  Thanks.
> _______________________________________________
> xorg at lists.freedesktop.org: X.Org support
> Archives: http://lists.freedesktop.org/archives/xorg
> Info: http://lists.freedesktop.org/mailman/listinfo/xorg
> Your subscription address: gheskett at wdtv.com


-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
<http://tinyurl.com/ddg5bz>
<http://www.cantrip.org/gatto.html>
Computers are useless.  They can only give you answers.
		-- Pablo Picasso