Public bug reported:
Since I "upgraded" (I did a clean install, just without erasing /home)
from 10.04 to 12.04 (both 64-bit) I can't reliably connect an external
display.
I tried it with the same screen (Dell S2409W connected via VGA) and experienced
these different situations (I guess behaviour might have changed due to some
upgrades to X.org-related packages):
Previously:
1) Preferences -> Display panel hangs (after rebooting I configured the
external screen using xrandr and it worked)
2) After disconnecting the display system sometimes hung, requiring hard reboot
(Ctrl+Alt+F1 didn't work)
Now:
1) Even if I enable the external screen in Prefenreces -> Display, the virtual
screen is not widened, nothing shows on the external display as well
2) Configuring an external screen using xrandr:
$ xrandr --auto --output VGA1 --mode 1920x1080 --right-of LVDS1
$ xrandr --auto --output LVDS1 --mode 1440x900 --left-of VGA1
makes the virtual screen wider but still nothing shows on an external display.
3) Sometimes experimenting with both xrandr and Preferences -> Display applet
causes the OS to hang
I am currently unable to make this external display work, being forced
to only use the internal laptop one.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-22.35-generic 3.2.14
Uname: Linux 3.2.0-22-generic x86_64
NonfreeKernelModules: wl
.tmp.unity.support.test.0:
ApportVersion: 2.0.1-0ubuntu1
Architecture: amd64
CompizPlugins:
[core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Wed Apr 11 17:11:03 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
bcmwl, 5.100.82.38+bdcom, 3.2.0-21-generic, x86_64: installed
bcmwl, 5.100.82.38+bdcom, 3.2.0-22-generic, x86_64: installed
vboxhost, 4.1.12, 3.2.0-22-generic, x86_64: installed
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GpuHangFrequency: Several times a day
GpuHangReproducibility: Occurs more often under certain circumstances
GpuHangStarted: Since before I upgraded
GraphicsCard:
Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller
[8086:2a42] (rev 07) (prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:024f]
Subsystem: Dell Device [1028:024f]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
MachineType: Dell Inc. Latitude E6500
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-22-generic
root=UUID=b59ade0f-05d4-4a67-8069-6d388bd9db41 ro
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/08/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A13
dmi.board.name: 0NY667
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA13:bd05/08/2009:svnDellInc.:pnLatitudeE6500:pvr:rvnDellInc.:rn0NY667:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude E6500
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.7.4-0ubuntu3
version.ia32-libs: ia32-libs 20090808ubuntu35
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati
1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:0.0.16+git20111201+b5534a1-1build2
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug compiz-0.9 freeze precise ubuntu
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https://bugs.launchpad.net/bugs/979004
Title:
Xorg freezes or an external display is not handled correctly
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