A further bit of information. We use these two monitors with a Macbook Pro (Dual Headed, not MST) and they work without issue, so that rules out hardware issues.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1612241 Title: Display blinking on MST Dual Monitors Status in xorg package in Ubuntu: New Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1612241/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
