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[Launchpad Bug Tracker <1492170@xxxxxxxxxxxxxxxxxx>]

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After upgrading to Wily, when I change the configuration of screens
attached (specifically: dock the laptop to a docking station with a
vertically larger external screen or open the laptop to activate the
internal screen while correctly running with said external screen) this
causes various display issues, including flickering while the mouse
cursor is moved and or one screen flickering the contents of the other;
incorrect resolution; incorrect offset of displayed screen contents on
screen.  I saw similar (can't say whether or not identical) effects
using the stock 4.1.0-3.3 generic kernel, and mainline generic kernels
4.0.0-040000rc2.201503031836 (working before the first reboot after
upgrading to Wily), 4.1.3-040103.201507220129 and
4.1.6-040106.201508170230.  In addition (probably a separate issue),
when booting 4.1.0-3.3 to external monitor only, the mouse cursor was
not shown.

After my last test I was able to bring things back to "normal" by
killing the X server and logging in again.

$ lsb_release -rd
Description:	Ubuntu Wily Werewolf (development branch)
Release:	15.10

$ apt-cache policy xserver-xorg-video-intel
xserver-xorg-video-intel:
  Installed: 2:2.99.917+git20150808-0ubuntu2
  Candidate: 2:2.99.917+git20150808-0ubuntu2
  Version table:
 *** 2:2.99.917+git20150808-0ubuntu2 0
        500 http://de.archive.ubuntu.com/ubuntu/ wily/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu2
Uname: Linux 4.1.6-040106-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.18-0ubuntu9
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: Fri Sep  4 11:11:59 2015
DistUpgraded: 2015-09-03 15:02:03,761 DEBUG enabling apt cron job
DistroCodename: wily
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:05cb]
InstallationDate: Installed on 2014-08-01 (399 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Dell Inc. Latitude E7440
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.1.6-040106-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to wily on 2015-09-03 (0 days ago)
dmi.bios.date: 06/26/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A10
dmi.board.name: 0RYCC9
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA10:bd06/26/2014:svnDellInc.:pnLatitudeE7440:pvr01:rvnDellInc.:rn0RYCC9:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E7440
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.12.1+15.10.20150805-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.64-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.6.3-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.6.3-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu5
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+git20150808-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
xserver.bootTime: Fri Sep  4 11:10:45 2015
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                4413 
 vendor                                     AUO
xserver.version: 2:1.17.2-1ubuntu5

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: Incomplete


** Tags: amd64 apport-bug compiz-0.9 latest-bios-a15 ubuntu wily
-- 
Screen flicker and resolution problems after hot-plug
https://bugs.launchpad.net/bugs/1492170
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