Window decorator corruption

[Dave Chiluk]

After switching back from another user or after lock screen I occasionally get corruption. This usually takes a few weeks after a restart to reproduce. Might be related to nvidia drivers or mesa, or compiz, or something else. Experienced this before recent update to mesa 12.0.6, so I don't think this is a mesa regression.

Decorations shown in jpg move with window, but are not selectable.

Opening against unity, as the unity taskbar often shares similar corruption.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: unity 7.4.0+16.04.20160906-0ubuntu1
ProcVersionSignature: Ubuntu 4.8.0-34.36~16.04.1-generic 4.8.11
Uname: Linux 4.8.0-34-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.03.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:03:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 367.57 Mon Oct 3 20:37:01 PDT 2016
 GCC version: gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4)
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Mon Jan 30 10:54:45 2017
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
GraphicsCard:
 NVIDIA Corporation Device [10de:1c03] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: eVga.com. Corp. Device [3842:6163]
InstallationDate: Installed on 2016-01-15 (380 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160115)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-34-generic root=UUID=029afe58-00c3-4872-9556-b3fd990c5cf1 ro quiet splash crashkernel=384M-:128M crashkernel=384M-:128M crashkernel=384M-:128M scsi_mod.use_blk_mq=y dm_mod.use_blk_mq=y crashkernel=384M-:128M
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/06/2013
dmi.bios.vendor: Intel Corp.
dmi.bios.version: SIX7910J.86A.0594.2013.0806.2241
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: DX79SI
dmi.board.vendor: Intel Corporation
dmi.board.version: AAG28808-500
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrSIX7910J.86A.0594.2013.0806.2241:bd08/06/2013:svn:pn:pvr:rvnIntelCorporation:rnDX79SI:rvrAAG28808-500:cvn:ct3:cvr:
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.70-1~ubuntu16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.6-0ubuntu0.16.04.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.6-0ubuntu0.16.04.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Mon Jan 9 00:41:06 2017
xserver.configfile: default
xserver.errors: open /dev/fb0: No such file or directory
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.18.4-0ubuntu0.2

[Dave Chiluk (chiluk)]

Uploading jpg a second time so it's obvious, and not missed in the maas of auto-uploaded logs.