A weird issue: I have Debian Sid running in a multiseat [1] configuration.
Seat 1 is connected to a "normal" LCD monitor. Seat 2 is connected via
HDMI to a television. Last week I replaced the graphic card of seat 1
(Asus Strix geforce gtx950) but now when a user on seat 1 logout of Gnome
the television on seat 2 shutdown.