Bug#805471: /usr/bin/optirun: optirun fails with "systemd-logind: failed to get session"

[Giacomo Boffi]

Luca Boccassi wrote:

> Could you please try to change to KernelDriver=nvidia and restart?

so I did, but nothing changed...

I forgot to mention that when I use optirun the nvidia
module is loaded and the discrete card is turned on, as testified by
/proc/acpi/bbswitch
and also by the temperature of the exausts of my pc... and this was
true even when i had
KernelDriver=nvidia-current in bumblebee.conf. To switch off the card
I have to rmmod
the nvidia module.

With  respect to the PID that "does not belong to any known session",
it is the same across
different invocation of optirun, even from different shells, and if I
try the command

sudo ps x | grep nnnn

I cannot see such a process on my system.

I even tried to see if the PID remains the same if I log out from my
session and try to
run optirun from a new session, but it seems that gdm locks itself
when it's run a second
time so I cannot confirm this suspicion of mine

Regards,

        gb