Same issue here on a Dell Latitude E5470. OS: Ubuntu 16.10 Kernel: 4.8.0-22-generic CPU: Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz GPU: Intel Corporation HD Graphics 520 (rev 07) Xorg (package version): 1:7.7+13ubuntu4
Also it's very intermittent, hard to forcefully reproduce. I was doing a test with Xenial on the same laptop earlier today and it never happened. Also, may be related, may not be: When I first turned off mirror screens so I had the second screen, I ended up with a flickering, messed up background. To get rid of it, I had to full screen something. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1634449 Title: Black flicker when leaving monitor Status in linux package in Ubuntu: Triaged Bug description: Sometimes, when moving cursor from one monitor to the other, the external monitor turns black and gets back on again. The hardware is Dell Latitude E5470 with Docking Station and monitor connected via DisplayPort (checked both ports and happens on both of them). Everything worked correctly on Ubuntu 16.04, but it happens on Ubuntu 16.10. Kernel 4.8.0-25-generic. The bug isn't related to cursor only, if focus changes by alt+tab it sometimes happens as well. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1553503 This is the same bug as this one, but closed. --- ApportVersion: 2.20.3-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: vessel 5602 F...m pulseaudio /dev/snd/controlC0: vessel 5602 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 16.10 HibernationDevice: RESUME=UUID=56fab9c8-7226-47b9-91cb-a2c865f81bc0 InstallationDate: Installed on 2016-08-31 (47 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) MachineType: Dell Inc. Latitude E5470 Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.8.0-25-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.8.0-25.27-generic 4.8.1 RelatedPackageVersions: linux-restricted-modules-4.8.0-25-generic N/A linux-backports-modules-4.8.0-25-generic N/A linux-firmware 1.161 Tags: yakkety Uname: Linux 4.8.0-25-generic x86_64 UpgradeStatus: Upgraded to yakkety on 2016-10-14 (3 days ago) UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 06/15/2016 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.7.3 dmi.board.name: 0P88J9 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.7.3:bd06/15/2016:svnDellInc.:pnLatitudeE5470:pvr:rvnDellInc.:rn0P88J9:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E5470 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1634449/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
