Screen scrambled upon login

[Alex Moldovan]

I'm running Precise with proposed enabled, using nouveau with a NVIDIA Corporation G84 [GeForce 8600M GT] [10de:0407]. When logging-in to Ubuntu (3D) the screen looks scrambled, sometimes like a mosaic. This takes a few seconds before showing the wallpaper and then loading the desktop (login3d and 2d png screenshot). When logging into Ubuntu 2D it the same thing plus a completely gray screen that takes other few seconds before loading the desktop (login2d png screenshot). This is reproducible every time I login after a restart. It also happens if I login using a different user. It doesn't happen once I log back in to my user's session, only at the first login after a restart.

Using nvidia-current 295.20-0ubuntu1 the screen shows another scrambled image, the same image every time (nvidia_driver.png).

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2
ProcVersionSignature: Ubuntu 3.2.0-17.26-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 1.92-0ubuntu1
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,gnomecompat,grid,place,compiztoolbox,imgpng,move,snap,session,resize,regex,vpswitch,mousepoll,animation,wall,workarounds,fade,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Mon Feb 20 13:47:49 2012
DistUpgraded: Log time: 2012-02-10 08:57:42.345309
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
 NVIDIA Corporation G84 [GeForce 8600M GT] [10de:0407] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:01f1]
MachineType: Dell Inc. Inspiron 1520
ProcEnviron:
 LANGUAGE=en_CA:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-17-generic root=UUID=657c3b34-86b4-40b6-b4e0-e8e5b0a3d220 ro quiet
SourcePackage: xserver-xorg-video-nouveau
UpgradeStatus: Upgraded to precise on 2012-02-14 (6 days ago)
dmi.bios.date: 07/11/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 0WP044
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA09:bd07/11/2008:svnDellInc.:pnInspiron1520:pvr:rvnDellInc.:rn0WP044:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Inspiron 1520
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu4
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0~rc2-0ubuntu5
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0~rc2-0ubuntu5
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.99.901+git20120126-0ubuntu2
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

[Omer Akram (om26er)]

its maybe something that was hidden previously with LightDM having a wallpaper behind the login screen. I am using nvidia-binary so the issue is definitely not related to nouveau.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.