Seems like no one has much experience with this. My only suggestion would be to make sure you are using the latest driver available from nvidia.com. I don't know how closely the Debian package repository tracks the NVIDIA drivers, but the Debian-based Ubuntu ones are not updated very frequently. The downside to using NVIDIA's installer is that you will need to reinstall the NVIDIA driver every time you update the Linux kernel. Good luck, Greg On 07/22/2011 10:30 PM, Francesco Pietra wrote:

With GeForce2 MX200 / Debian GNU-Linux i386 wheezy I have no problems in running movie with "define centroid".

In contrast, with GeForce gtx-470 (two such cards and PhenomII 1075T (six cores)/ Debian amd64 wheezy, on running movie to get the trace of the centroid, the X server hangs and the keyboard is no more sensed. I have to restart the computer from a ssh-linked desktop.

In both cases chimera 1.5.3. Chimera was started as the only application, just after booting the OS (I am saying that because, to run molecular dynamics, I have first to command

# nvidia-smi -L

# nvidia-smi -pm 1

Any experience to this regard?

thanks francesco pietra