ubuntu-x-swat team mailing list archive

[Nicolas Avrutin <879092@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

When three (or presumably more) users (local or LDAP) are logged in,
locking the screen and pressing the "Switch User" button on the unlock
screen dialog causes the screen to flash several times (similar to what
occurs when changing monitor resolution), then going blank. Moving the
mouse or pressing keys causes the switch user dialog to come up again
for the same user, making it impossible to switch users. This is
consistently reproducible. Sometimes, instead of dropping back to the
switch user dialog, it drops to a blank screen with a blinking cursor,
or a blank screen with the message "mountall: Disconnnected from
Plymouth".

We tried updating one workstation to Oneiric. The issue was still
present, except it would always drop down to the blank screen, instead
of giving you the same switch user dialog. This would suggest that it
tries to switch to the next tty to start a new X session but is unable
to start the new X session.

We have 12 workstations with ATI cards (model is in the lspci output)
and 6 with Nvidia cards using the same image. This issue only occurs on
(all) the workstations with the ATI cards, not the ones with Nvidia
cards.

Downloading the driver from ATI's website and installing it manually
made no difference.

fglrxinfo output is below. Other logs should be attached automatically.

fglrxinfo output:
display: :0.0  screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI Radeon HD 3450
OpenGL version string: 3.3.10665 Compatibility Profile Context

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu3.1
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
Date: Thu Oct 20 16:29:45 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 fglrx, 8.840, 2.6.38-11-generic, x86_64: installed 
 blcr, 0.8.2: added 
 virtualbox, 4.0.10, 2.6.38-11-generic, x86_64: installed
GraphicsCard:
 ATI Technologies Inc RV620 LE [Radeon HD 3450] [1002:95c5] (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:9018]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
JockeyStatus: xorg:fglrx - ATI/AMD proprietary FGLRX graphics driver (Proprietary, Enabled, In use)
MachineType: Dell Inc. Vostro 220 Series
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic root=UUID=48026894-7a91-441c-a0be-179295760266 ro quiet splash vt.handoff=7
Renderer: Unknown
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/17/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.1.4
dmi.board.name: 0P301D
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.1.4:bd04/17/2009:svnDellInc.:pnVostro220Series:pvr:rvnDellInc.:rn0P301D:rvrA01:cvnDellInc.:ct3:cvr:
dmi.product.name: Vostro 220 Series
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty2
version.fglrx-installer: fglrx-installer N/A
version.ia32-libs: ia32-libs 20090808ubuntu13
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

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


** Tags: amd64 apport-bug natty ubuntu

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https://bugs.launchpad.net/bugs/879092

Title:
  cannot switch users if 3 or more users are logged in

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