[Bug 1895794] Re: [i915] Plugging an external monitor on USB-C port does not show up. Need to reboot each time

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/1895794 Title: [i915] Plugging an external monitor on USB-C port does not show up. Need to reboot each time Status in linux package in Ubuntu: Expired Bug description: Whenever I plug an external monitor (Dell P2720DC) on my ThinkPad X1 (8th gen.) with Ubuntu 20.04, it is not directly recognized. I need to reboot the system so that it can find the monitor. Here is an extract of dmesg: [87389.923632] usb 1-5: new high-speed USB device number 33 using xhci_hcd [87390.072891] usb 1-5: New USB device found, idVendor=413c, idProduct=8442, bcdDevice= 1.00 [87390.072897] usb 1-5: New USB device strings: Mfr=0, Product=0, SerialNumber=1 [87390.072901] usb 1-5: SerialNumber: E9021071FBE1 [87390.073934] hub 1-5:1.0: USB hub found [87390.074047] hub 1-5:1.0: 6 ports detected [87390.367780] usb 1-5.5: new high-speed USB device number 34 using xhci_hcd [87390.472473] usb 1-5.5: New USB device found, idVendor=0451, idProduct=82ff, bcdDevice= 2.00 [87390.472479] usb 1-5.5: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [87390.475022] hid-generic 0003:0451:82FF.0014: hiddev0,hidraw1: USB HID v1.11 Device [HID 0451:82ff] on usb-0000:00:14.0-5.5/input0 ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-47.51-generic 5.4.55 Uname: Linux 5.4.0-47-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.8 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: skip CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None CurrentDesktop: Unity Date: Wed Sep 16 09:40:10 2020 DistUpgraded: Fresh install DistroCodename: focal DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation UHD Graphics [8086:9b41] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Lenovo UHD Graphics [17aa:22be] InstallationDate: Installed on 2020-08-24 (22 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) MachineType: LENOVO 20U9004PFR ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-47-generic root=UUID=4a93b148-f388-4849-9a18-9e0e4d32c97a ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/01/2020 dmi.bios.vendor: LENOVO dmi.bios.version: N2WET19W (1.09 ) dmi.board.asset.tag: Not Available dmi.board.name: 20U9004PFR dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN2WET19W(1.09):bd07/01/2020:svnLENOVO:pn20U9004PFR:pvrThinkPadX1CarbonGen8:rvnLENOVO:rn20U9004PFR:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Carbon Gen 8 dmi.product.name: 20U9004PFR dmi.product.sku: LENOVO_MT_20U9_BU_Think_FM_ThinkPad X1 Carbon Gen 8 dmi.product.version: ThinkPad X1 Carbon Gen 8 dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.101-2 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~20.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.8-0ubuntu1~20.04.1 version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.4 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+git20200226-1 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/ubuntu/+source/linux/+bug/1895794/+subscriptions