Public bug reported:
I used to have my display settings so that only one external monitor
would be used when available, and the laptop's builtin monitor would be
disabled. When plugging and unplugging the external monitor (whether in
the VGA or HDMI port), monitors would switch automatically, as is
obviously expected.
After upgrading from 15.04 to 15.10, as per bug #1535436, these settings
were lost, and after reboot, the two monitors were both enabled in
extended desktop mode (or whatever it's called).
So I went to Settings -> Displays (while I had an HDMI monitor
connected), and turned off the builtin display.
That worked, but when unplugging the HDMI monitor, the builtin one
remains turned off despite being the only available monitor. No matter
how many times I plug and unplug the external HDMI monitor, the builtin
one never turns on (the external one does work).
This is a HUGE regression as it may leave you without screen.
By plugging a monitor via the VGA port, it works as expected.
I'm testing with the same monitors and cables (and computer) as I was
using in 15.04 when everything worked fine.
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 4.2.0-23.28-generic 4.2.6
Uname: Linux 4.2.0-23-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86_64 Kernel Module 340.96 Sun Nov 8 22:33:28
PST 2015
GCC version: gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu2)
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Jan 18 22:18:48 2016
DistUpgraded: 2016-01-18 11:11:01,146 DEBUG enabling apt cron job
DistroCodename: wily
DistroVariant: ubuntu
DkmsStatus:
bbswitch, 0.7, 3.19.0-43-generic, x86_64: installed
bbswitch, 0.7, 4.2.0-23-generic, x86_64: installed
nvidia-340, 340.96, 3.19.0-43-generic, x86_64: installed
nvidia-340, 340.96, 4.2.0-23-generic, x86_64: installed
vboxhost, 4.3.14: added
GraphicsCard:
Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev
09) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] Device [1025:0647]
NVIDIA Corporation GF117M [GeForce 610M/710M/810M/820M / GT
620M/625M/630M/720M] [10de:1140] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] GeForce 710M [1025:0691]
InstallationDate: Installed on 2013-10-11 (829 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: Acer Aspire V3-571G
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-23-generic.efi.signed
root=UUID=5830b30e-69e8-4bb4-8a2b-bc2b43c7414a ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to wily on 2016-01-18 (0 days ago)
dmi.bios.date: 10/15/2012
dmi.bios.vendor: Acer
dmi.bios.version: V2.07
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: VA50_HC_CR
dmi.board.vendor: Acer
dmi.board.version: Type2 - Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V2.07
dmi.modalias:
dmi:bvnAcer:bvrV2.07:bd10/15/2012:svnAcer:pnAspireV3-571G:pvrV2.07:rvnAcer:rnVA50_HC_CR:rvrType2-BoardVersion:cvnAcer:ct10:cvrV2.07:
dmi.product.name: Aspire V3-571G
dmi.product.version: V2.07
dmi.sys.vendor: Acer
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 2:1.17.2-1ubuntu9.1
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: Mon Jan 18 17:01:13 2016
xserver.configfile: /etc/X11/xorg.conf
xserver.errors:
NVIDIA(0): Failed to initiate mode change.
NVIDIA(0): Failed to complete mode change
NVIDIA(0): Failed to initiate mode change.
NVIDIA(0): Failed to complete mode change
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.17.2-1ubuntu9.1
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug ubuntu wily
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1535452
Title:
[15.10 REGRESSION] Builtin laptop display doesn't turn back on when
external hdmi monitor is unplugged
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