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[Stefan Thielscher <1222602@xxxxxxxxxxxxxxxxxx>]

Good to hear it's solved for you!

The strange thing is that I just replaced that broken CRT with the new
LCD monitor. Just disconnected the old monitor and connected the new
one. Boom, high CPU usage :-(. I didn't install any new software, etc.

I never had this before in 2,5 years and as I said I still have this
problem under 14.04, even though the CPU usage there seems to be a bit
lower than under 13.10 (I assume due to optimizations in the whole
graphics stack).

The funny thing is that I have high CPU usage even when the external
monitor is in stand-by/powered off, but when I physically disconnect it
(by either removing the VGA cable from the VGA port or unplugging the
KVM switch's USB cable which also provides the power for that thing),
everything is okay. Makes me wonder what's going on there.

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https://bugs.launchpad.net/bugs/1222602

Title:
  [regression] [gen3] Mesa 9.2 makes Unity unusable on Atom class
  hardware and 943/945 graphics controllers

Status in Mesa:
  Confirmed
Status in Release Notes for Ubuntu:
  Invalid
Status in “mesa” package in Ubuntu:
  Fix Released
Status in “nux” package in Ubuntu:
  Fix Released
Status in “unity” package in Ubuntu:
  Invalid

Bug description:
  After the upgrade to Mesa 9.2.0 unity is barely usable.
  Dash, Alt+Tab switcher and Alt+F2 command line shows in more than 1 minute, using 100% cpu.

  A downgrade to mesa 9.1.6-2ubuntu2 restores full performance.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: libgl1-mesa-glx 9.2-1ubuntu1
  ProcVersionSignature: Ubuntu 3.11.0-5.11-generic 3.11.0
  Uname: Linux 3.11.0-5-generic i686
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.12.1-0ubuntu3
  Architecture: i386
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  Date: Mon Sep  9 01:51:45 2013
  DistUpgraded: 2013-09-08 20:36:47,811 DEBUG enabling apt cron job
  DistroCodename: saucy
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Mobile 945GSE Express Integrated Graphics Controller [8086:27ae] (rev 03) (prog-if 00 [VGA controller])
     Subsystem: Micro-Star International Co., Ltd. Device [1462:0110]
     Subsystem: Micro-Star International Co., Ltd. Device [1462:0110]
  InstallationDate: Installed on 2013-09-07 (1 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release i386 (20130424)
  MachineType: MICRO-STAR INTERNATIONAL CO., LTD U90/U100
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-5-generic root=UUID=674329c8-d0a6-4954-89c0-72821cfa0ba8 ro quiet splash vt.handoff=7
  SourcePackage: mesa
  UpgradeStatus: Upgraded to saucy on 2013-09-08 (0 days ago)
  dmi.bios.date: 12/01/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.3
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: U90/U100
  dmi.board.vendor: MICRO-STAR INTERNATIONAL CO., LTD
  dmi.board.version: Ver.001
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 10
  dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO., LTD
  dmi.chassis.version: Ver.001
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.3:bd12/01/2009:svnMICRO-STARINTERNATIONALCO.,LTD:pnU90/U100:pvrVer.001:rvnMICRO-STARINTERNATIONALCO.,LTD:rnU90/U100:rvrVer.001:cvnMICRO-STARINTERNATIONALCO.,LTD:ct10:cvrVer.001:
  dmi.product.name: U90/U100
  dmi.product.version: Ver.001
  dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO., LTD
  version.compiz: compiz 1:0.9.10+13.10.20130828.2-0ubuntu1
  version.libdrm2: libdrm2 2.4.46-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.2-1ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.2-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.14.2.901-2ubuntu4
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu6
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.14-4ubuntu3
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
  xserver.bootTime: Mon Sep  9 01:46:55 2013
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                1001 
   vendor                                     HSD
  xserver.version: 2:1.14.2.901-2ubuntu4

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