Public bug reported:
Binary package hint: lxdm
I have Ubuntu 10.04 32-bit installed on my desktop PC and used "sudo
apt-get install lubuntu-desktop" to add LUbuntu as a choice, since it is
an older P4 2.4 MHz PC. I first selected "gdm" as my chosen login
manager instead of "lxdm" in the dpkg configure screen that popped up
during install of meta-package lubuntu-desktop. Later, I thought it
would be nice to use "sudo dpkg-reconfigure lxdm" and select "lxdm" for
a lightweight login manager. However, after rebooting, both lxdm and
gdm start up, and cause various login and LXDE usage problems (once
logged in), and sometimes gdm appears, sometimes lxdm. I saw by using
"ps -aef | grep dm" that lxdm and gdm both were running.
If I use "sudo dpkg-reconfigure gdm" I also get the same choice of gdm
or lxdm. However, setting lxdm in the dpkg setup for gdm causes the
same behavior after rebooting: Both gdm and lxdm are running.
By setting back to gdm and rebooting, everything works normally again
(only one login manager running), although at that point gdm is once
again the chosen and running login manager.
One behavior I see when gdm and lxdm are both running is that after
login to LUbuntu desktop, CPU usage is at 100% and the system is very
unresponsive. Trying to open any window (e.g. lxterm) causes a flashing
window and titlebar, and it's very hard to get it to close (system is
almost unresponsive).
** Affects: lxdm (Ubuntu)
Importance: Undecided
Status: New
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lxdm selected causes gdm and lxdm both to run
https://bugs.launchpad.net/bugs/579538
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