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[Steven Usdansky <usdanskys@xxxxxxxxxxxxxx>]

Public bug reported:

Ubuntu-Mate 15.10 development version updated as of 4-Jun 2300 UTC .
Video driver is nouveau

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


~$ sudo inxi -F
System:    Host: Pyrope Kernel: 3.19.0-20-generic x86_64 (64 bit) Desktop: MATE 1.8.2  Distro: Ubuntu 15.10 wily
Machine:   System: HP-Pavilion product: FQ578AAR-ABA s3707c serial: MXW9050KY9
           Mobo: PEGATRON model: NutMeg v: 1.02 serial: MS1C91R52904711
           Bios: American Megatrends v: 5.12 date: 02/17/2009
CPU:       Dual core AMD Athlon 64 X2 5400+ (-MCP-) cache: 1024 KB 
           clock speeds: max: 2800 MHz 1: 1000 MHz 2: 1000 MHz
Graphics:  Card: NVIDIA C78 [GeForce 9100]
           Display Server: X.org 1.17.1 driver: nouveau tty size: 234x65 Advanced Data: N/A for root
Audio:     Card NVIDIA MCP72XE/MCP72P/MCP78U/MCP78S High Definition Audio driver: snd_hda_intel
           Sound: Advanced Linux Sound Architecture v: k3.19.0-20-generic
Network:   Card-1: NVIDIA MCP77 Ethernet driver: forcedeth
           IF: eth0 state: down mac: 00:24:8c:13:79:5b
           Card-2: NetGear WNA1100 Wireless-N 150 [Atheros AR9271] driver: ath9k_htc
           IF: wlan0 state: N/A mac: N/A
Drives:    HDD Total Size: 500.1GB (41.7% used) ID-1: /dev/sda model: ST3500413AS size: 500.1GB
Partition: ID-1: / size: 19G used: 3.6G (21%) fs: ext4 dev: /dev/sda10
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   None detected - is lm-sensors installed and configured?
Info:      Processes: 180 Uptime: 1:00 Memory: 816.8/3700.3MB Client: Shell (sudo) inxi: 2.2.16

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-20.20-generic 3.19.8
Uname: Linux 3.19.0-20-generic x86_64
ApportVersion: 2.17.3-0ubuntu3
Architecture: amd64
CurrentDesktop: MATE
Date: Thu Jun  4 18:07:43 2015
InstallationDate: Installed on 2015-05-28 (7 days ago)
InstallationMedia: Ubuntu-MATE 15.10 "Wily Werewolf" - Alpha amd64 (20150528)
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug corruption wily

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

Title:
  Random text characters partially or completely missing

Status in xorg package in Ubuntu:
  New

Bug description:
  Ubuntu-Mate 15.10 development version updated as of 4-Jun 2300 UTC .
  Video driver is nouveau

  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

  
  ~$ sudo inxi -F
  System:    Host: Pyrope Kernel: 3.19.0-20-generic x86_64 (64 bit) Desktop: MATE 1.8.2  Distro: Ubuntu 15.10 wily
  Machine:   System: HP-Pavilion product: FQ578AAR-ABA s3707c serial: MXW9050KY9
             Mobo: PEGATRON model: NutMeg v: 1.02 serial: MS1C91R52904711
             Bios: American Megatrends v: 5.12 date: 02/17/2009
  CPU:       Dual core AMD Athlon 64 X2 5400+ (-MCP-) cache: 1024 KB 
             clock speeds: max: 2800 MHz 1: 1000 MHz 2: 1000 MHz
  Graphics:  Card: NVIDIA C78 [GeForce 9100]
             Display Server: X.org 1.17.1 driver: nouveau tty size: 234x65 Advanced Data: N/A for root
  Audio:     Card NVIDIA MCP72XE/MCP72P/MCP78U/MCP78S High Definition Audio driver: snd_hda_intel
             Sound: Advanced Linux Sound Architecture v: k3.19.0-20-generic
  Network:   Card-1: NVIDIA MCP77 Ethernet driver: forcedeth
             IF: eth0 state: down mac: 00:24:8c:13:79:5b
             Card-2: NetGear WNA1100 Wireless-N 150 [Atheros AR9271] driver: ath9k_htc
             IF: wlan0 state: N/A mac: N/A
  Drives:    HDD Total Size: 500.1GB (41.7% used) ID-1: /dev/sda model: ST3500413AS size: 500.1GB
  Partition: ID-1: / size: 19G used: 3.6G (21%) fs: ext4 dev: /dev/sda10
  RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
  Sensors:   None detected - is lm-sensors installed and configured?
  Info:      Processes: 180 Uptime: 1:00 Memory: 816.8/3700.3MB Client: Shell (sudo) inxi: 2.2.16

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: xorg 1:7.7+7ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-20.20-generic 3.19.8
  Uname: Linux 3.19.0-20-generic x86_64
  ApportVersion: 2.17.3-0ubuntu3
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Thu Jun  4 18:07:43 2015
  InstallationDate: Installed on 2015-05-28 (7 days ago)
  InstallationMedia: Ubuntu-MATE 15.10 "Wily Werewolf" - Alpha amd64 (20150528)
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)

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