Gnome Screensaver Issue

[mathieg2]

I have reported this before, but it appears to have been merged with another bug. Will attach a video to establish whether these are the same bug. Only happens on my nvidia computer. ati seems ok. This first happened when I installed Precise. Did not affect
previous releases of ubuntu.

As a workaround, I have disabled screen blanking on this computer. i.e. powersave for screen is never activated.

When I lock the screen, I am unable to unlock it again.

The wallpaper appears for a second when I move the mouse, but disappears again.

The video below illustrates the problem - I started the video from bootup to show that it happens every time. The problem is shown in the last 10-20 seconds of the clip.

http://youtu.be/1CtzPkep73M

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-21.34-generic-pae 3.2.13
Uname: Linux 3.2.0-21-generic-pae i686
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
ApportVersion: 2.0-0ubuntu1
Architecture: i386
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]
Date: Sat Mar 31 08:17:44 2012
DistUpgraded: 2012-02-26 22:01:25,311 DEBUG enabling apt cron job
DistroCodename: precise
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard: NVIDIA Corporation G96 [GeForce 9400 GT] [10de:0641] (rev a1) (prog-if 00 [VGA controller])
MachineType: System manufacturer System Product Name
ProcEnviron:
 TERM=screen-bce
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-21-generic-pae root=UUID=4a45f643-9353-4adc-b0a8-298b00ef039d ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to precise on 2012-02-26 (33 days ago)
dmi.bios.date: 11/16/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1101
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M4A87TD EVO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1101:bd11/16/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A87TDEVO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.7.2-0ubuntu4
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.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu8
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

[mathieg2 (graeme-salsaholics)]

When I lock the screen, I am unable to unlock it again.

The wallpaper appears for a second when I move the mouse, but disappears again.

The video below illustrates the problem - I started the video from bootup to show that it happens every time. The problem is shown in the last 10-20 seconds of the clip.

http://youtu.be/1CtzPkep73M

[mathieg2 (graeme-salsaholics)]

I ran nohup gnome-screensaver --debug to get an idea of what might be going wrong...

[mathieg2 (graeme-salsaholics)]

Fixed my computer:

I ran:

sudo dpkg-reconfigure libpam-runtime
and reset all the settings to default.

Computer now works again!

[Timo Aaltonen (tjaalton)]

thanks, closing