FAQ: Remote visualisation

What happens to my data when the reservation ends?

Once a week, Sunday night at 04:00am, all VNC sessions on the remote visualisation servers are killed. Your visualisation application will stop taking any input and it will stop responding. This means that you will lose any un-saved data!!! If you want to continue working, you have to submit a new reservation, re-start your visualisation application and re-load your last saved data.

I forgot my VNC password

Don't worry - you can simply set a new password for VNC. Log on to the remote visualisation server and type


Type a new password and verify it by entering it a second time. You will then be asked

Would you like to enter a view-only password (y/n)?

If you answer yes ("y"), you will be asked for another VNC password. You can give this password to co-workers, so that they can attach their PC to your VNC session, e.g. to discuss new results interactively. Your co-workers will see your desktop, but their inputs will be ignored.

I would like to have an environment for collaborative work - is that possible?

Yes, that's possible in VNC. But as the SuperMUC-NG policy prescribes non-sharing of user accounts, the preferred way would be to us just a local VNC session, and share screen via one of the many available video conferencing systems.

I would really like to use software xyz on the remote visualisation server - is that possible?

All LRZ users can compile and install their own software applications in their respective $HOME directory. If the software is used by many users, the LRZ may provide a module for it. Please send us an incident through the Service Desk.

I would like to use CUDA

This is currently not possible on the LRZ HPC systems. LRZ does also operate visualization systems with GPUs, but use of CUDA on these is rather limited.

I want to use vglconnect

Only VNC connections via the login nodes are supported by the LRZ. If you want to use vglconnect, you have to establish an ssh-tunnel between your desktop and the remote visualisation server via one of the login nodes.

I'm sorry, but non of these questions describe my problem. How can I get help?

If you have questions or problems that are not answered on this page, please submit an Incident Report through the Service Desk.