This problem appears to be getting worse. The displays are blinking a lot more regularly now, and sometimes both at the same time.
Furthermore, the secondary monitor (MST 1.0) which is configured as my secondary screen, will, once per day, blink off, and when it comes back on, the lower 3/4 of the screen is interlaced - i.e. missing every other line. The top 1/4 displays fine, but the picture is offset somewhat, so it's displaying the incorrect part of the screen there. I have to turn the display off in settings, then turn it back on, and then rearrange my monitor layout (they become swapped when this happens) in order to recover it. -- You received this bug notification because you are a member of Ubuntu Touch seeded 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/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
