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[Bug 546578] Re: black screen after a few user switches

 

** Branch linked: lp:ubuntu/gnome-screensaver

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https://bugs.launchpad.net/bugs/546578

Title:
  black screen after a few user switches

Status in X.org XServer - ATI gfx chipset driver:
  Confirmed
Status in “gnome-screensaver” package in Ubuntu:
  Fix Released
Status in “linux” package in Ubuntu:
  Confirmed
Status in “xorg-server” package in Ubuntu:
  Fix Released
Status in “gnome-screensaver” source package in Lucid:
  Fix Released
Status in “linux” source package in Lucid:
  Confirmed
Status in “xorg-server” source package in Lucid:
  Fix Released

Bug description:
  [Copycat - A blackscreen can also appear due to a bug in the NVidia
  Graphics Driver. (goto bug #573101)]

  [Problem]
  Up-to-date Lucid with radeon driver. After switching user a few times (usually between 3 and 5 times), the screen goes black with only the mouse cursor visible after entering the user's password. VTs are also completely black. Restarting gdm fixes the issue, and nothing odd appears in XOrg.0.log when the black screen occurs.

  - It also happens with KMS disabled.
  - It also happens with compiz disabled for all users.

  [Workaround] 1
  Uninstall gnome-screensaver (see bug #555870 - something gnome-screensaver does is triggering this X bug)
  [Workaround] 2
  Blindfold: Unlock session by typing password, then press <Alt>-<F2> (call "Run ..." dialog), then type "xgamma -gamma 1.0" and hit <Enter>
  [Workaround] 3
  Update gnome-screensaver to 2.30.0-0ubuntu2 or higher (yet in proposed repo). Those versions are compiled with disabled "fade on lock".

  ProblemType: Bug
  Architecture: i386
  Date: Wed Mar 24 21:43:21 2010
  DistroRelease: Ubuntu 10.04
  DkmsStatus: Error: [Errno 2] No such file or directory
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
  Lsusb:
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Hewlett-Packard HP dx5150 MT(PV753AA)
  Package: xorg 1:7.5+3ubuntu1
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-17-generic root=UUID=2f620498-4095-49f2-8ea6-7355f3d696ec ro
  ProcEnviron:
   LANG=en_US.utf8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.32-17.26-generic 2.6.32.10+drm33.1
  SourcePackage: xorg
  Uname: Linux 2.6.32-17-generic i686
  dmi.bios.date: 03/08/2007
  dmi.bios.vendor: Phoenix Technologies, LTD
  dmi.bios.version: 1.19
  dmi.board.name: 09AC
  dmi.board.vendor: MSI
  dmi.chassis.type: 3
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr1.19:bd03/08/2007:svnHewlett-Packard:pnHPdx5150MT(PV753AA):pvr:rvnMSI:rn09AC:rvr:cvnHewlett-Packard:ct3:cvr:
  dmi.product.name: HP dx5150 MT(PV753AA)
  dmi.sys.vendor: Hewlett-Packard
  system:
   distro:             Ubuntu
   codename:           lucid
   architecture:       i686
   kernel:             2.6.32-17-generic

  [lspci]
  01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS480 [Radeon Xpress 200G Series] [1002:5954]
       Subsystem: Hewlett-Packard Company Device [103c:3009]

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