[Pkg-xfce-devel] Bug#773913: Lightdm switches immediately to a black screen

[Fabien Renaud]

Package: lightdm
Version: 1.10.3-3
Severity: grave
Justification: renders package unusable

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
I think it happened after an important upgrade related to systemd
a few months ago but I'm not fully sure. I'm now using
systemd-logind.

   * What was the outcome of this action?
Notice that I report the bug with a different kernel.
The kernel on which the bug occurs is: Linux 3.16-2-amd64

Lightdm starts and instantly (maybe after 1/10 sec) shows a
black screen.
It is possible to login (I can see that the HDD light working) but
the screen is still black. I'm reporting this for lightdm but I
guess this is more general.
Notice that when I use another kernel (3.14-2-amd64) the situation
is a bit different: the screen is black but if I increase the
luminosity of the screen then it suddenly works.


   * What outcome did you expect instead?
To be able at least to increase the luminosity until it works.
The best would be of course to have immediately a screen with display
on.


-- System Information:
Debian Release: 8.0
  APT prefers testing-updates
  APT policy: (500, 'testing-updates'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.14-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)