The issue only reproduced on first thunderbolt port which next to escape key. The external monitor doesn't lit up even though xrandr shows it is connected. Switching output modes by hotkey or GUI doesn't help.
xrandr output: ... DP-2-3 connected 1920x1080+0+0 ... ** Attachment added: "dmesg-5.4.0-21-switch-fail.log" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1872034/+attachment/5355434/+files/dmesg-5.4.0-21-switch-fail.log -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1872034 Title: [Focal] No HDMI output through thunderbolt docking station Status in OEM Priority Project: Triaged Status in xorg-server package in Ubuntu: Incomplete Bug description: I can find monitor in display list, but no output from it. Also, I can't switch to extend mode, it failed to apply the setting and switched back to mirror mode. [Steps] 1. Connect a thunderbolt docking station to thunderbolt port. 2. Connect HDMI monitor to HDMI port on the docking station. 3. Switch mode in display setting ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27 Uname: Linux 5.4.0-21-generic x86_64 ApportVersion: 2.20.11-0ubuntu25 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Fri Apr 10 16:44:40 2020 DistUpgraded: Fresh install DistroCodename: focal DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation UHD Graphics 620 (Whiskey Lake) [8086:3ea0] (prog-if 00 [VGA controller]) Subsystem: Dell UHD Graphics 620 (Whiskey Lake) [1028:08af] InstallationDate: Installed on 2020-04-09 (1 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402) MachineType: Dell Inc. XPS 13 9380 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-21-generic root=UUID=98c0c28f-278e-442b-8fc9-6d663bacd68d ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/08/2019 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.1.1 dmi.board.vendor: Dell Inc. dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.1.1:bd01/08/2019:svnDellInc.:pnXPS139380:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct10:cvr: dmi.product.family: XPS dmi.product.name: XPS 13 9380 dmi.product.sku: 08AF dmi.sys.vendor: Dell Inc. version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.100-4 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20190815-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1872034/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
