Two days ago I did the upgrade to Xubuntu 15.04 on my neighbors Dell D620. Since the upgrade I am not able to boot the laptop when on the docking station (with 90W power supply). All I get is a white screen with the mouse cursor in the centre which I am able to move. When I boot the system without the docking station everything works fine. I have now changed the default login manager to gdm and everything works fine also, on and off the docking station. This is reproducable always.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ubuntu-release-upgrader-core 1:15.04.14
ProcVersionSignature: Ubuntu 3.19.0-25.26-generic 3.19.8-ckt2
Uname: Linux 3.19.0-25-generic i686
ApportVersion: 2.17.2-0ubuntu1.2
Architecture: i386
CrashDB: ubuntu
Date: Tue Aug 18 18:41:34 2015
InstallationDate: Installed on 2014-11-18 (273 days ago)
InstallationMedia: Xubuntu 14.10 "Utopic Unicorn" - Release i386 (20141022.1)
PackageArchitecture: all
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=de_DE.UTF-8
SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: Upgraded to vivid on 2015-08-16 (2 days ago)
VarLogDistupgradeTermlog:
Some more observations:
Using lightdm again and booting on the dock I can get to the login by left or right mouse button or just by undocking. When I put the laptop back on the dock the system freezes (reproduceable).