CentOS - Nov 2013 - Problem with X11 application and Nouveau driver

I have finally received and am configuring my new workstations eith the NVS510
graphics cards, and have run into rather a problem.  The X server seems to be
loading the NOUVEAU driver properly (based on the contents of Xorg.0.log), but I
have one X11 application that doesn't work correctly; it runs as though
XSynchronized is always True, even though it's explicitly set to False in
the code. In other words, its redraw behavior is god-awful; worse because it
auto-redraws once per second for little apparent reason.  And some of the
windows draw with artifacts if they're covered and uncovered.

Any ideas, anyone?  I will gladly provide more info on request, but I'm not
an expert X11 programmer (worse, this application uses a third party wrapper
library). This is definitely new behavior on this new computer (the previous
computers, also using the Nouveau driver with GeForce 7600 cards, did not seem
to have this behavior).

-G.
--
Glenn Eychaner (geychaner at lco.cl)
Telescope Systems Programmer, Las Campanas Observatory

Glenn Eychaner wrote:
> I have finally received and am configuring my new workstations eith the
NVS510 graphics cards, and have run into rather a problem.  The X server seems
to be loading the NOUVEAU driver properly (based on the contents of Xorg.0.log),
but I have one X11 application that doesn't work correctly; it runs as
though XSynchronized is always True, even though it's explicitly set to
False in the code. In other words, its redraw behavior is god-awful; worse
because it auto-redraws once per second for little apparent reason.  And some of
the windows draw with artifacts if they're covered and uncovered.
>
> Any ideas, anyone?  I will gladly provide more info on request, but I'm
not an expert X11 programmer (worse, this application uses a third party wrapper
library). This is definitely new behavior on this new computer (the previous
computers, also using the Nouveau driver with GeForce 7600 cards, did not seem
to have this behavior).
If you just want an easy solution you could try the nvidia drivers from 
elrepo. Start with nvidia-detect to find out which version you need, as 
explained here:
http://elrepo.org/tiki/kmod-nvidia

If you actually want to debug nouveau or whatnot, that's another matter.

Nvidia driver fixed the problem.  Thank you El Repo!  Where do I send you $10?
(Seriously. This saved me so much time.)

-G.

Nicolas Thierry-Mieg wrote:
> If you just want an easy solution you could try the nvidia drivers from 
> elrepo. Start with nvidia-detect to find out which version you need, as 
> explained here:
> 
> http://elrepo.org/tiki/kmod-nvidia
On Nov 13, 2013, at 5:38 PM, Glenn Eychaner <geychaner at mac.com> wrote:
> I have finally received and am configuring my new workstations eith the
NVS510 graphics cards, and have run into rather a problem.  The X server seems
to be loading the NOUVEAU driver properly (based on the contents of Xorg.0.log),
but I have one X11 application that doesn't work correctly; it runs as
though XSynchronized is always True, even though it's explicitly set to
False in the code. In other words, its redraw behavior is god-awful; worse
because it auto-redraws once per second for little apparent reason.  And some of
the windows draw with artifacts if they're covered and uncovered.
> 
> Any ideas, anyone?  I will gladly provide more info on request, but I'm
not an expert X11 programmer (worse, this application uses a third party wrapper
library). This is definitely new behavior on this new computer (the previous
computers, also using the Nouveau driver with GeForce 7600 cards, did not seem
to have this behavior).
--
Glenn Eychaner (geychaner at lco.cl)
Telescope Systems Programmer, Las Campanas Observatory