Public bug reported: configuration: - PC with Intel HD Graphics 630 (i5-7600) - DELL U2415 monitor connected to displayport port on PC (/sys/class/drm/card0/card0-DP-5) - DELL U2412M connected to DELL U2415 (/sys/class/drm/card0/card0-DP-6)
After a suspend/wake up cycle, the first monitor wakes up but the slave (U2412M) does not. When I query /sys/class/drm/card0/card0-DP-5 and /sys/class/drm/card0/card0-DP-6 when DELLU2412M has failed to wake up, they both have enabled:enabled and status:connected i am not sure if this is an xserver issue or a kernel driver issue. On the one hand i have similar issues using Wayland instead of xserver. On the other hand, this workaround for a similar issue on nvida works: "xset dpms force off" which I found here: https://askubuntu.com/questions/854754/monitor-stays-in-sleep-when-daisy-chained-via-displayport If this works, it seems to be something under control of the xserver? Issuing "xset dpms force off" works, produces no logging in /var/log ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1 ProcVersionSignature: Ubuntu 4.13.0-37.42-generic 4.13.13 Uname: Linux 4.13.0-37-generic x86_64 .tmp.unity_support_test.0: ApportVersion: 2.20.7-0ubuntu3.7 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Wed Mar 28 15:28:24 2018 DistUpgraded: 2017-10-25 03:10:03,447 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py' DistroCodename: artful DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation HD Graphics 630 [8086:5912] (rev 04) (prog-if 00 [VGA controller]) Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer HD Graphics 630 [1297:4038] InstallationDate: Installed on 2017-02-26 (395 days ago) InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2) MachineType: Shuttle Inc. DH170 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-37-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 SourcePackage: xserver-xorg-video-intel UpgradeStatus: Upgraded to artful on 2017-10-25 (154 days ago) dmi.bios.date: 01/24/2017 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 2.06 dmi.board.asset.tag: Default string dmi.board.name: FH170 dmi.board.vendor: Shuttle Inc. dmi.board.version: 1.0 dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2.06:bd01/24/2017:svnShuttleInc.:pnDH170:pvr1.0:rvnShuttleInc.:rnFH170:rvr1.0:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.family: D dmi.product.name: DH170 dmi.product.version: 1.0 dmi.sys.vendor: Shuttle Inc. version.compiz: compiz 1:0.9.13.1+17.10.20170901-0ubuntu1 version.libdrm2: libdrm2 2.4.83-1 version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.8-0ubuntu0~17.10.1 version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.8-0ubuntu0~17.10.1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.5-0ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.10.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 ** Affects: xserver-xorg-video-intel (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug artful ubuntu -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1759584 Title: displayport MST on intel graphics: slave monitor does not wake up from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1759584/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp