When I put my primary display under secondary using System Settings / Display and press Apply, X crashes and I see the login screen.
Result is the same if I use xrandr directly.
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
NonfreeKernelModules: nvidia wl
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86_64 Kernel Module 352.41 Fri Aug 21 23:09:52 PDT 2015
GCC version: gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu2)
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
Date: Tue Nov 3 14:32:21 2015
DistUpgraded: Fresh install
DistroCodename: wily
DistroVariant: ubuntu
DkmsStatus:
bbswitch, 0.7, 4.2.0-16-generic, x86_64: installed
bcmwl, 6.30.223.248+bdcom, 4.2.0-16-generic, x86_64: installed
nvidia-352-updates, 352.41, 4.2.0-16-generic, x86_64: installed
DpkgLog:
GraphicsCard:
Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. Device [1043:16cd]
Subsystem: ASUSTeK Computer Inc. Device [1043:16cd]
InstallationDate: Installed on 2015-10-27 (6 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: ASUSTeK COMPUTER INC. X555LN
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-16-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg crash
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/14/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: X555LN.309
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X555LN
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX555LN.309:bd08/14/2014:svnASUSTeKCOMPUTERINC.:pnX555LN:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX555LN:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: X555LN
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
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.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
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 N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
xserver.bootTime: Tue Nov 3 14:31:56 2015
xserver.configfile: /etc/X11/xorg.conf
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.17.2-1ubuntu9
Christian, thank you very much for your help. Here is the info you've requested:
$ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
X555LN.311
04/10/2015
I've updated BIOS, and was able to successfully change display position using System Settings / Display (I had to press Detect Displays for that to work).
However, after I logged out from Unity, I was not able to log back --- Unity now crashes back to the login screen.
I will try running xrandr and report results in the next comment.