Public bug reported:
I have two Dell U2715H monitors, one running in MST 2.0 mode, one
running in MST 1.0 mode (the terminator).
My laptop is plugged via mini display port into the MST 2.0 enabled
monitor. The MST 1.0 monitor is daisychained from displayport out on the
MST 2.0 monitor, to the displayport in on the MST 1.0 monitor.
I'm using the default cabling provided with the monitors.
I am running Ubuntu 16.04
The laptop is a Dell XPS 13 9333 - it is plugged into the mains.
Cables are not loose.
The setup works almost without issue, but:
Actual Result:
1. The monitors take it in turns to blink once - off, then back on, for 4
seconds at a time, seemingly randomly.
2. Any given monitor often blinks off, 4 seconds, then on when pressing play on
a youtube video
3. Any given monitor usually blinks off, 4 seconds, then on when dragging a
window from the other monitor, onto it.
Expected result:
Monitors should be constantly on, at all times.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: GNOME
Date: Thu Aug 11 13:55:59 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
bcmwl, 6.30.223.248+bdcom, 4.4.0-31-generic, x86_64: installed
bcmwl, 6.30.223.248+bdcom, 4.4.0-34-generic, x86_64: installed
virtualbox, 5.0.24, 4.4.0-34-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09)
(prog-if 00 [VGA controller])
Subsystem: Dell Broadwell-U Integrated Graphics [1028:0665]
InstallationDate: Installed on 2016-05-17 (85 days ago)
InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Release amd64
(20160421)
MachineType: Dell Inc. XPS 13 9343
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-34-generic.efi.signed
root=/dev/mapper/ubuntu--gnome--vg-root ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/11/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 0310JH
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA07:bd11/11/2015:svnDellInc.:pnXPS139343:pvr:rvnDellInc.:rn0310JH:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: XPS 13 9343
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.1
version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2.3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20160325-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug 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/1612241
Title:
Display blinking on MST Dual Monitors
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1612241/+subscriptions
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