Public bug reported:
I have a touchscreen laptop with external display connected. Both
support maximum resolution of 4k (3840x2160). The laptop screen is on
the left, external display on the right.
After initial boot from daily xenial live cd 2016-01-17, both screens
are at the maximum resolution. When I touch the laptop screen, the
cursor correctly shows my touch position.
Using unity-control-center, when I set the resolution of the laptop
display to 1920x1080, the screen blanks momentarily and apport reports
that Ubuntu has experienced an internal error. The resolution reverts
to 3820x2160 on both screens. I try again and the screen resolution
changes properly. I submitted the report through apport several minutes
ago, but I don't know how to link it here and I'm not sure it's related.
After the resolution change, the laptop display on the left is 1920x1080
and the monitor display on the right is 3840x2160. Touches on the left
are scaled to the entire width of the desktop, rather than under my
finger.
Reverting the resolution to 3840x2160 on both monitors through unity-
control-center, the touches are still scaled to the whole desktop. In
other words, touches on the right side of the laptop display register on
the touchless monitor.
When I log out, the touches are correct on the login screen. When I log
back in as the ubuntu user with both resolutions at 3820x2160, the touch
positions are correct.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+12ubuntu1
ProcVersionSignature: Ubuntu 4.3.0-5.16-generic 4.3.3
Uname: Linux 4.3.0-5-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.19.3-0ubuntu3
Architecture: amd64
CasperVersion: 1.366
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: Sun Jan 17 20:12:52 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation Device [8086:191b] (rev 06) (prog-if 00 [VGA controller])
Subsystem: Samsung Electronics Co Ltd Device [144d:c12b]
Subsystem: Samsung Electronics Co Ltd Device [144d:c12b]
LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160117)
MachineType: SAMSUNG ELECTRONICS CO., LTD. 940Z5L
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi
file=/cdrom/preseed/username.seed boot=casper quiet splash ---
cdrom-detect/try-usb=true noprompt persistent
SourcePackage: xorg
Symptom: display
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/20/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P04AFC.084.151020.SH
dmi.board.asset.tag: No Asset Tag
dmi.board.name: NP940Z5L-X01US
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: SGL8554A1H-C01-G001-S0001+10.0.10240
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP04AFC.084.151020.SH:bd10/20/2015:svnSAMSUNGELECTRONICSCO.,LTD.:pn940Z5L:pvrP04AFC:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP940Z5L-X01US:rvrSGL8554A1H-C01-G001-S0001+10.0.10240:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
dmi.product.name: 940Z5L
dmi.product.version: P04AFC
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
version.compiz: compiz 1:0.9.12.2+16.04.20151211-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.66-2
version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.8-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.8-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.17.3-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.6.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20151217-1~exp1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
xserver.bootTime: Sun Jan 17 20:10:41 2016
xserver.configfile: default
xserver.errors: systemd-logind: failed to get session: PID 2978 does not belong
to any known session
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
product id 16714
vendor SDC
xserver.version: 2:1.17.3-2ubuntu2
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug compiz-0.9 ubuntu xenial
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1535123
Title:
Touchscreen location incorrect after changing resolution using unity-
control-center with dual-display setup
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1535123/+subscriptions
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