I'm currently having the same problem. I did install the Beryl window manager, but I don't think I have the beta nvidia drivers. Anyway, you might want to check for yourself:
$ dpkg -l nvidia-glx
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==============-==============-============================================
ii nvidia-glx 1.0.9625+2.6.1 NVIDIA binary XFree86 4.x/X.Org driver
I'm currently having the same problem. I did install the Beryl window manager, but I don't think I have the beta nvidia drivers. Anyway, you might want to check for yourself:
$ dpkg -l nvidia-glx Unknown/ Install/ Remove/ Purge/Hold Not/Installed/ Config- files/Unpacked/ Failed- config/ Half-installed /Hold/Reinst- required/ X=both- problems (Status,Err: uppercase=bad) ======= ====-== ======= =====-= ======= ======= ======= ======= ======= ======= =
Desired=
| Status=
|/ Err?=(none)
||/ Name Version Description
+++-===
ii nvidia-glx 1.0.9625+2.6.1 NVIDIA binary XFree86 4.x/X.Org driver