Re: X windows text not displayed/redrawn

On Sun, Jul 07, 2013 at 08:53:44AM +0100, Nigel Taylor wrote:
> I have a laptop and this is fine running same version, the desktop since upgrading 
> does not display text for some applications, kwrite/xfe/libreoffice. The text is 
> there, xfe for example if window is moved the text appears, but if something moves 
> over and away the text is not redrawn, shift the window again the text comes back.
> 
> This was upgraded from a current build in April, when it was working.
> 
> The laptop which works has a radeon video card.
> 
> The desktop Xorg.0.log is below, has a NVidia card.

Yes, not only XAA acceleration was removed in X server 1.14, but also
the implementation of shadowfb used in the nv driver is broken. 

Currently you have to disable shadowfb via a small /etc/X11/xorg.conf
file to get the nv driver working again on affected chipsets. 

-- Cut --
Section "Device"
	Identifier "nvidia broken acceleration"
	Driver "nv"
	Option "NoAccel" "true"
	Option "ShadowFB" "false"
EndSection
-- Cut --


-- 
Matthieu Herrb