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[Harald Rudell <738458@xxxxxxxxxxxxxxxxxx>]

Every month or so it occurs (a system, that is never shut down) What I
do is that I ssh in from another box and kill the high-load process. If
I can't find out which one it is (happened once), I restart X.

I think it is related to that I have an nVidia Quadro NVS 450 with three
displays and Ubuntu 11.04 effectively stopped supporting more than one
display. X or GPU gets confused and draws in the wrong rectangle. A
window might update on display 1 but is all black on display 2. This was
all good on 10.10

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https://bugs.launchpad.net/bugs/738458

Title:
  Gnome won't show screen saver unlock, clock-applet high cpu

Status in “gnome-screensaver” package in Ubuntu:
  New

Bug description:
  Binary package hint: gnome-panel

  On return to my computer, the screen saver unlock is not displayed
  instead, the screen is black with only a mouse cursor that can be moved
  ssh in to the machine and top shows:
  PID USR PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
  1305 root 20 0 686m 312m 21m R 98 9.0 110:05 Xorg
  2395 foxyboy 20 0 351m 10m 5768 S 60 0.3 21.33.10 clock-applet
  ...

  kill the clock-applet process 2395, and the screen saver login appears
  Gnome shows: "Clock" has quit unexpectedly

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: xorg 1:7.5+6ubuntu3
  ProcVersionSignature: Ubuntu 2.6.35-28.49-generic 2.6.35.11
  Uname: Linux 2.6.35-28-generic x86_64
  NonfreeKernelModules: nvidia
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  260.19.06  Mon Sep 13 04:29:19 PDT 2010
   GCC version:  gcc version 4.4.5 (Ubuntu/Linaro 4.4.4-14ubuntu5)
  Architecture: amd64
  Date: Sat Mar 19 15:24:37 2011
  DkmsStatus:
   nvidia-current, 260.19.06, 2.6.32-26-generic, x86_64: built 
   nvidia-current, 260.19.06, 2.6.35-24-generic, x86_64: installed 
   nvidia-current, 260.19.06, 2.6.35-27-generic, x86_64: installed 
   nvidia-current, 260.19.06, 2.6.35-28-generic, x86_64: installed 
   nvidia-current, 260.19.06, 2.6.35-23-generic, x86_64: installed
  MachineType: System manufacturer System Product Name
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-28-generic root=UUID=6e418107-84af-4790-b047-0df1e3d0f0bf ro quiet splash
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.utf8
   SHELL=/bin/bash
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  Xrandr:
   Error: command ['xrandr', '--verbose'] failed with exit code 1: Xlib:  extension "RANDR" missing on display ":0.0".
   RandR extension missing
  dmi.bios.date: 05/25/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1208
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P5Q-EM DO
  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.:bvr1208:bd05/25/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5Q-EMDO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer
  system:
   distro:             Ubuntu
   codename:           maverick
   architecture:       x86_64
   kernel:             2.6.35-28-generic

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