Dear Walid,
Am 23.05.2018 um 17:08 schrieb Walid MOGHRABI <w.moghrabi@servicemagic.eu>:
This is a known bug in mate and pretty hard to debug/fix apparently.
There is a workaround anyway, you can create a small script that starts xautolock at user session start like this :
[…]
Works great! Thanks a lot!
Jens