sidebar doesn't appear anymore when Window in split screen mode

[sevku]

When I dock a window to the side to split the screen, the Sidebar doesn't appear anymore when I move the cursor to the side of the screen. I have to undock the window first.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.19.1-0ubuntu4
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: Wed Nov 4 08:37:15 2015
DistUpgraded: 2015-10-28 00:03:04,139 ERROR got error from PostInstallScript ./xorg_fix_proprietary.py (g-exec-error-quark: Kindprozess »./xorg_fix_proprietary.py« konnte nicht ausgeführt werden (Datei oder Verzeichnis nicht gefunden) (8))
DistroCodename: wily
DistroVariant: ubuntu
DpkgLog:

ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display [8086:0f31] (rev 0e) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:3986]
InstallationDate: Installed on 2015-08-13 (82 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 013: ID 0cf3:3004 Atheros Communications, Inc. AR3012 Bluetooth 4.0
 Bus 001 Device 003: ID 5986:055d Acer, Inc
 Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 80ES
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic.efi.signed root=UUID=4842d481-f5d0-41c1-a614-769115c50b50 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UdevLog: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden: '/var/log/udev'
UpgradeStatus: Upgraded to wily on 2015-10-27 (7 days ago)
dmi.bios.date: 06/06/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: 9CCN26WW(V2.04)
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Lenovo B50-30
dmi.board.vendor: LENOVO
dmi.board.version: SDK0F82993WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo B50-30
dmi.modalias: dmi:bvnLENOVO:bvr9CCN26WW(V2.04):bd06/06/2014:svnLENOVO:pn80ES:pvrLenovoB50-30:rvnLENOVO:rnLenovoB50-30:rvrSDK0F82993WIN:cvnLENOVO:ct10:cvrLenovoB50-30:
dmi.product.name: 80ES
dmi.product.version: Lenovo B50-30
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.64-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
xserver.bootTime: Tue Nov 3 19:24:35 2015
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 5565
 vendor CMN
xserver.version: 2:1.17.2-1ubuntu9

[sevku (severin-kunz)]

the bug shows up mainly when i dock the windows to left side of the screen where I also have the sidebar. However, sometimes on the other side too. Couldn't figure out in which cases.

[penalvch (penalvch)]

sevku, thank you for reporting this and helping make Ubuntu better.

As per http://support.lenovo.com/us/en/products/laptops-and-netbooks/lenovo-b-series-laptops/lenovo-b50-30-notebook an update to your computer's buggy and outdated BIOS is available (2.11). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it change anything?

If it doesn't, could you please both specify what happened, and provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date

For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette .

Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. As well, you don't have to create a new bug report.

Once the BIOS is updated, if the problem is still reproducible, and the information above is provided, then please mark this report Status New. Otherwise, please mark this as Invalid.

Thank you for your understanding.

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]