Public bug reported:

At the time when the log-in screen or the desktop would normally appear
a full screen of random bits (when cold booting) or garbled graphics
(when warm booting, sometimes) is shown indefinitely. When switching to
another VT errors such as these appear from time to time:

[   21.993752] nouveau E[   PFIFO][0000:01:00.0] SUBFIFO0: ch 2 [Xorg[989]] 
subc 0 mthd 0x0000 data 0x00000000
[   22.145339] nouveau E[   PFIFO][0000:01:00.0] SUBFIFO0: (unknown bits 
0x00008000)
[   22.145348] nouveau E[   PFIFO][0000:01:00.0] SUBFIFO0: ch 4 
[unity_support_t[1186]] subc 0 mthd 0x0000 data 0x00000000
[   22.145366] nouveau E[   PFIFO][0000:01:00.0] SUBFIFO0: (unknown bits 
0x00008000)
...
[  197.680016] nouveau E[unity_support_t[1186]] failed to idle channel 
0xcccc0000 [unity_support_t[1186]]
[  197.683524] nouveau E[   PFIFO][0000:01:00.0] SUBFIFO0: (unknown bits 
0x00008000)
[  197.687049] nouveau E[   PFIFO][0000:01:00.0] SUBFIFO0: ch 4 
[unity_support_t[1186]] subc 0 mthd 0x0000 data 0x00000000

The graphics card is a Zotac GT430 (NVC1 chipset).

Tried the xorg-edgers PPA with no success. A Fedora 20 alpha 4 live CD
works fine.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic i686
ApportVersion: 2.12.5-0ubuntu2
Architecture: i386
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
Date: Sat Oct 19 15:59:45 2013
DistUpgraded: Fresh install
DistroCodename: saucy
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 NVIDIA Corporation GF108 [GeForce GT 430] [10de:0de1] (rev a1) (prog-if 00 
[VGA controller])
   Subsystem: ZOTAC International (MCO) Ltd. Device [19da:1167]
InstallationDate: Installed on 2013-10-19 (0 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release i386 (20131016.1)
MachineType: BIOSTAR Group R690A-M2T
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic 
root=UUID=eeeca14f-edc0-4022-a9df-e53f2dd06c28 ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-nouveau
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/08/2007
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
dmi.board.name: R690A-M2T
dmi.board.vendor: AMD
dmi.board.version: 1.0
dmi.chassis.type: 3
dmi.chassis.vendor: BIOSTAR Group
dmi.modalias: 
dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd05/08/2007:svnBIOSTARGroup:pnR690A-M2T:pvr1.0:rvnAMD:rnR690A-M2T:rvr1.0:cvnBIOSTARGroup:ct3:cvr:
dmi.product.name: R690A-M2T
dmi.product.version: 1.0
dmi.sys.vendor: BIOSTAR Group
version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1
version.libdrm2: libdrm2 2.4.46-1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.1-1ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.1-1ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.14.3-3ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
xserver.bootTime: Sat Oct 19 15:49:17 2013
xserver.configfile: default
xserver.devices:
 input        Power Button         KEYBOARD, id 6
 input        Power Button         KEYBOARD, id 7
 input        Sleep Button         KEYBOARD, id 8
 input        Logitech USB Receiver KEYBOARD, id 9
 input        Logitech USB Receiver KEYBOARD, id 10
xserver.errors:
 Failed to load module "nvidia" (module does not exist, 0)
 Failed to load module "nvidia" (module does not exist, 0)
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.14.3-3ubuntu2
xserver.video_driver: nouveau

** Affects: xserver-xorg-video-nouveau (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 saucy ubuntu

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https://bugs.launchpad.net/bugs/1242053

Title:
  Boot ends in Xorg/nouveau hanging (nvidia NVC1)

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