Bug#930622: xserver-xorg-video-intel: sddm doesn't start. (EE) Failed to open authorization file

[jacoby]

Dear Maintainer,

I experience the same problem on my laptop after dist-upgrade to buster.

I found out that starting the 4.9 kernel, X is working. With the 4.19 
kernel, the problem is seen.

Disabling apparmor with 4.19 kernel does not help.