[Pkg-xfce-devel] Bug#681512: lightdm: graphic glitches when shutting down

Ralf Jung post at ralfj.de
Fri Jul 13 20:10:47 UTC 2012

Package: lightdm
Version: 1.2.2-3
Severity: normal

Dear Maintainer,

I am experiencing various graphical glitches when shutting down my system.
There are several different behaviours I observe, and so far I found no way to
predict what's happening:
* Sometimes (but very rarely, so maybe fixed by the last update) the lightdm
login screen is shown for the fraction of a second after my desktop disappears
and before the console appears
* Often (more than two of three shutdowns), the spacing and alignment of the
shutdown status messages is totally messed up: The "[....]"/"[ ok ]" markers 
the first messages do not appear properly at the left edge of the screen, but
somewhere in the middle, sometimes they are even so far to the right that
linebreaks occur. The overwriting of the "[....]" with the "[ ok ]" fails or 
done only partially... generally, it looks as if something is printing
whitespaces or some of the output is done in parallel, so that it's all messed
up. The 2nd part of the messages (after "Switching to runlvel... using
makefile-style concurrent boot...") looks as expected.
* Sometimes (I'd approximate between 10 and 25% of the shutdowns), and
independently of the above glitch, the background of the console shown during
shutdown is not just black, but it's filled all over with something looking
similar to a black "element of" sign (in the mathematical sense) on a bright
grey background, blinking on and off. Messages written by the shutdown scripts
overwrite this, i.e. they have a normal black background behind their
characters, but the blinking is all around them. As the shutdown proceeds and
the console scrolls down to show new messages, the background that's used for
the "scrolled-in" lines is normal black, but the lines that were visible from
the beginning are still blinking...

I am using KDE as desktop environment, and I have no clue whether this is a
problem in lightdm or KDE or somewhere else. None of this ever happened when I
used KDM. Some information that may be useful: I do not have plymouth
installed, and I am using the proprietary fglrx drivers. This also happens on
my desktop system where I am using the proprietary NVidia drivers.

Kind regards,

-- System Information:
Debian Release: wheezy/sid
  APT prefers testing
  APT policy: (990, 'testing'), (100, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.2.0-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages lightdm depends on:
ii  adduser                3.113+nmu3
ii  consolekit             0.4.5-3
ii  dbus                   1.6.0-1
ii  debconf [debconf-2.0]  1.5.44
ii  libc6                  2.13-33
ii  libglib2.0-0           2.32.3-1
ii  libpam0g               1.1.3-7.1
ii  libxcb1                1.8.1-1
ii  libxdmcp6              1:1.1.1-1
ii  lightdm-gtk-greeter    1.1.6-2

Versions of packages lightdm recommends:
ii  xserver-xorg  1:7.7+1

Versions of packages lightdm suggests:
pn  accountsservice  <none>

-- debconf information:
  lightdm/daemon_name: /usr/sbin/lightdm
* shared/default-x-display-manager: lightdm

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