After upgrading from 11.04 to 11.10, the nVidia card 'forgets' that I have TwinView active, and restricts the display to one out of two monitors only.
One way to reproduce:
1) Start NX Client session (I use this to connect to my other machine), set the NX window to one screen
2) Start Picasa 3 on other window.
When Picasa starts up, the screens flicker. Next, all windows are back to 1 screen only, other screen contains a frozen last displayed frame.
nVidia X server settings says:
Driver version: 280.13
X server vendor version 1.10.4 X.Org
NV-CONTROL version 1.27
Graphics card GeForce 8600M GT
---
ApportVersion: 1.23-0ubuntu4
Architecture: i386
DistroCodename: oneiric
DistroRelease: Ubuntu 11.10
DistroVariant: ubuntu
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
NonfreeKernelModules: nvidia
Package: nvidia-graphics-drivers (not installed)
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4
Tags: oneiric ubuntu
Uname: Linux 3.0.0-12-generic-pae i686
UnreportableReason: Please work this issue through technical support channels first.
UpgradeStatus: Upgraded to oneiric on 2011-11-16 (14 days ago)
UserGroups: adm admin backup cdrom dialout lpadmin plugdev root sambashare
---
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86 Kernel Module 280.13 Wed Jul 27 16:55:43 PDT 2011
GCC version: gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)
.tmp.unity.support.test.0:
ApportVersion: 1.23-0ubuntu4
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,gnomecompat,grid,resize,mousepoll,snap,vpswitch,regex,wall,move,imgpng,unitymtgrabhandles,place,animation,fade,workarounds,expo,scale,session,ezoom,unityshell]
CompositorRunning: None
DistUpgraded: Log time: 2011-11-16 00:17:51.184393
DistroCodename: oneiric
DistroRelease: Ubuntu 11.10
DistroVariant: ubuntu
EcryptfsInUse: Yes
GraphicsCard:
nVidia Corporation G84 [GeForce 8600M GT] [10de:0407] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:022e]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
JockeyStatus:
xorg:nvidia_173 - NVIDIA accelerated graphics driver (Proprietary, Disabled, Not in use)
xorg:nvidia_173_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
MachineType: Dell Inc. XPS M1530
NonfreeKernelModules: nvidia
Package: nvidia-graphics-drivers (not installed)
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic-pae root=UUID=312ac7b5-c4de-47d1-b8fd-19938b6b0b38 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4
Tags: oneiric ubuntu regression-update
Uname: Linux 3.0.0-12-generic-pae i686
UpgradeStatus: Upgraded to oneiric on 2011-11-16 (14 days ago)
UserGroups: adm admin backup cdrom dialout lpadmin plugdev root sambashare
XorgConf:
Section "Device"
Identifier "Default Device"
Option "NoLogo" "True"
EndSection
dmi.bios.date: 11/19/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.name: 0R387D
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA12:bd11/19/2008:svnDellInc.:pnXPSM1530:pvr:rvnDellInc.:rn0R387D:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: XPS M1530
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1
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