[Bug 1686788] Re: External displays disabled after login - regression in 4.4.0-72.93 -> 4.4.0-75.96 update

The task "linux (Ubuntu)" has expired because it has had no new comments or updates for more than three years. If this issue is still present in an Ubuntu LTS kernel still under active support, please reopen the bug and provide updated details. If this issue was reported against an Ubuntu kernel no longer under active support but the issue still exists in a currently supported Ubuntu kernel, please open a new bug against that kernel version and provide the updated details, with a reference link to the original bug. This action was performed by an automated process maintained by the Ubuntu Kernel Team. ** Tags added: kernel-autoclosed kernel-autoclosed-expired ** Changed in: linux (Ubuntu) Status: Confirmed => Expired -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/1686788 Title: External displays disabled after login - regression in 4.4.0-72.93 -> 4.4.0-75.96 update Status in linux package in Ubuntu: Expired Bug description: With Dell E7440 with Intel graphics, attached to dock and also two external displays connected to the dock: when I boot the machine, the built-in display and the external displays are enabled in login screen. However, the external displays are disabled when I log in. All displays remain enabled after login with 4.4.0-72.93. I never installed 4.4.0-73.94 or 4.4.0-74.95 but I can see in the changelog that there were i915 changes in 4.4.0-73.94. The external displays are shown and are marked enabled in KDE's System Settings / Display and Monitor / Display Configuration. If I first mark them disabled (and apply the configuration) and then mark them enabled (and apply the configuration), they are actually enabled. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-75-generic 4.4.0-75.96 ProcVersionSignature: Ubuntu 4.4.0-75.96-generic 4.4.59 Uname: Linux 4.4.0-75-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: hannuko 2338 F.... pulseaudio /dev/snd/controlC0: hannuko 2338 F.... pulseaudio CurrentDesktop: KDE Date: Thu Apr 27 19:39:12 2017 HibernationDevice: RESUME=UUID=43dbb372-1944-40d4-b1ea-94193bf0bbb2 InstallationDate: Installed on 2015-12-21 (493 days ago) InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: Dell Inc. Latitude E7440 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-75-generic root=/dev/mapper/kubuntu--vg-root ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-75-generic N/A linux-backports-modules-4.4.0-75-generic N/A linux-firmware 1.157.8 SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-12-30 (117 days ago) dmi.bios.date: 02/02/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A14 dmi.board.name: 07F3F4 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA14:bd02/02/2015:svnDellInc.:pnLatitudeE7440:pvr01:rvnDellInc.:rn07F3F4:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E7440 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1686788/+subscriptions