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[Martin Pool <martinpool@xxxxxxxxx>]

Public bug reported:

Binary package hint: xorg

I have a Thinkpad X201 connected through it's docking station/ultrabase
to a Dell 2709W monitor.  This was working fine under Maverick; normally
with the internal monitor off but also with them mirrored or side-by-
side.

I just upgraded this machine to natty.  It booted up and showed grub on
the external monitor ok, the loading screen, and then the gdm login
screen.  After I log in, I get a black screen on both the internal and
external monitors, with just a white mouse pointer visible.  The mouse
pointer moves when I move the mouse.  Nothing else appears; there's no
disk light.  I switched to vt1, which worked.  Nothing was using
substantial cpu.  I kill-9ed gnome-session, which took me back to the
gdm login screen.  I tried the other session options including Ubuntu
classic (no effects) with no more success.

When I undocked the laptop it worked ok, including running Unity.

(I hit bug 749809 while filing this so the apport data might be
incomplete.)

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
Architecture: amd64
Date: Mon Apr  4 10:13:46 2011
DistroCodename: natty
DistroVariant: ubuntu
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, user)
 LANG=en_AU.UTF-8
 SHELL=/bin/zsh
SourcePackage: xorg
UpgradeStatus: Upgraded to natty on 2011-04-03 (0 days ago)
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu1

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug natty regression running-unity ubuntu

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https://bugs.launchpad.net/bugs/749817

Title:
  natty regression: screen goes black when external monitor is connected