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[Steven Usdansky <usdanskys@xxxxxxxxxxxxxx>]

My system does not seem to like the nvidia driver (I went with
nvidia-340). The display looked like crap, even after working with
nvidia-settings. This has happened before; I think 173 may have been the
last driver that worked well for me. I back to nouveau and the older
versions of xserver-xorg-core and xserver-common. There's something
about my onboard video/monitor combination that often seems to exhibit
problems, even with the nouveau driver (although nouveau seems to be
working properly for me now). FWIW, Fedora Rawhide displays properly for
me with xorg-x11-server-common-1.17.1-14.fc23.x86_64, xorg-x11-server-
Xorg-1.17.1-14.fc23.x86_64, and xorg-x11-drv-
nouveau-1.0.11-3.fc23.x86_64

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https://bugs.launchpad.net/bugs/1462147

Title:
  Random text characters partially or completely missing

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Problem began upon upgrading of
     xserver-xorg-core_1.17.1-0ubuntu3_amd64 and
     xserver-xorg-common_1.17.1-0ubuntu3_amd64xorg
  to
     xserver-xorg-core_1.17.1-0ubuntu4_amd64 and
     xserver-xorg-common_1.17.1-0ubuntu4_amd64xorg

  and was resolved by reverting to the pre-upgrade packages. Apparently random text characters, or parts thereof, would be missing in various applications including the Lightdm greeter, Firefox, Pidgin, Mate-terminal, the Mate panel clock, Unetbootin, and the Mate menu. This occurs both at my monitor's native resolution (1680x1050) and at 1600x1200.
  Other possibly useful info:
  libdrm-nouveau2:amd64         2.4.60-3                                amd64
  xserver-xorg-video-nouveau  1:1.0.11-1ubuntu2build1    amd64

  ---
  ApportVersion: 2.17.3-0ubuntu3
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: MATE
  DistUpgraded: Fresh install
  DistroCodename: wily
  DistroRelease: Ubuntu 15.10
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   NVIDIA Corporation C78 [GeForce 9100] [10de:0847] (rev a2) (prog-if 00 [VGA controller])
     Subsystem: Hewlett-Packard Company Device [103c:2a7a]
  InstallationDate: Installed on 2015-05-28 (7 days ago)
  InstallationMedia: Ubuntu-MATE 15.10 "Wily Werewolf" - Alpha amd64 (20150528)
  MachineType: HP-Pavilion FQ578AAR-ABA s3707c
  Package: xorg 1:7.7+7ubuntu4
  PackageArchitecture: amd64
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-20-generic root=UUID=ac1ad1b8-dff8-45ff-a286-c2337374ccb2 ro persistent
  ProcVersionSignature: Ubuntu 3.19.0-20.20-generic 3.19.8
  Tags:  wily ubuntu single-occurrence reproducible
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 3.19.0-20-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 02/17/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 5.12
  dmi.board.name: NutMeg
  dmi.board.vendor: PEGATRON CORPORATION
  dmi.board.version: 1.02
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.12:bd02/17/2009:svnHP-Pavilion:pnFQ578AAR-ABAs3707c:pvr:rvnPEGATRONCORPORATION:rnNutMeg:rvr1.02:cvnHewlett-Packard:ct3:cvrChassisVersion:
  dmi.product.name: FQ578AAR-ABA s3707c
  dmi.sys.vendor: HP-Pavilion
  version.compiz: compiz N/A
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-3
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.2-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.2-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu4
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
  xserver.bootTime: Fri Jun  5 05:54:00 2015
  xserver.configfile: None
  xserver.errors:
   Failed to load /usr/lib/xorg/modules/drivers/nouveau_drv.so: /usr/lib/xorg/modules/drivers/nouveau_drv.so: undefined symbol: xorgMir
   Failed to load module "nouveau" (loader failed, 7)
   Failed to load module "nvidia" (module does not exist, 0)
   Failed to load /usr/lib/xorg/modules/drivers/nouveau_drv.so: /usr/lib/xorg/modules/drivers/nouveau_drv.so: undefined symbol: xorgMir
   Failed to load module "nouveau" (loader failed, 7)
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs: Output                                   DVI-0           VGA-0
  xserver.version: 2:1.17.1-0ubuntu4
  xserver.video_driver: modeset

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