[slurm-users] X11 forwarding and VNC?

[Loris Bennett]

Hi Nathan,

Thanks, this indeed works and I've certainly seen hackier workarounds 😅

However, I assume there is also some other way, as the VNC users didn't
have the problem on our old system, where we used the external X11
plugin, although Luca points to there being an unresolved bug, so maybe
not (thanks, Luca).

Cheers,

Loris

Nathan Harper <nathan.harper at cfms.org.uk> writes:
> The hacky workaround is to 'ssh -X' back into the node before running the srun, so you appear as if you are remote even if you aren't.
>
> eg
> ssh -X loginnode01
> then:
> ssh -X loginnode01
> then:
> srun --x11=first bash
>
> On Fri, 22 Mar 2019 at 13:48, Loris Bennett <loris.bennett at fu-berlin.de> wrote:
>
>  Hi,
>
>  I'm using 18.08.6-2 and have got X11 forwarding working using the
>  in-built mechanism. This works fine for users who log in with 'ssh -X'
>  and then do 'srun --x11 --pty bash'.
>
>  However, I have users who start a VNC session on the login node and when
>  they run the srun command above from an xterm within the VNC session,
>  they get
>
>  srun: error: Cannot forward to local display. Can only use X11 forwarding with network displays.
>
>  Does anyone have any ideas whether this can be made to work and, if so,
>  how?
>
>  Cheers,
>
>  Loris
>
>  -- 
>  Dr. Loris Bennett (Mr.)
>  ZEDAT, Freie Universität Berlin Email loris.bennett at fu-berlin.de
-- 
Dr. Loris Bennett (Mr.)
ZEDAT, Freie Universität Berlin         Email loris.bennett at fu-berlin.de