Source: nvidia-graphics-drivers Version: 304.125-1 Severity: serious Tags: jessie sid stretch experimental help Control: affects -1 + gdm3 sddm
Setting the permissions on /dev/nvidia* properly (i.e. root:video 0660) breaks display managers that use acceleration (e.g. gdm3, sddm). A workaround is to put the dm's user into the video group (e.g. adduser Debian-gdm video). For local users logging into X a session-based membership in the video group is handled automatically via some consolekit magic (in nvidia-kernel-common). This bug went unnoticed for a long time due to wrong permissions (root:root 0666) being applied by the udev module autoload (see #801598). Andreas
