I wonder if the Belkin docking station has enough bandwidth to drive multiple monitors simultaneously. Have you tried unplugging everything from the dock and just plugging in a monitor to the DisplayPort alone?
Also next time the bug occurs, please run: journalctl -b0 > journal.txt and attach the resulting text file here. ** Package changed: xorg (Ubuntu) => linux-hwe-6.5 (Ubuntu) ** Changed in: linux-hwe-6.5 (Ubuntu) Status: New => Incomplete ** Tags added: multimonitor -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-hwe-6.5 in Ubuntu. https://bugs.launchpad.net/bugs/2054181 Title: Monitor Not Detected when Connected to Belkin Docking Station via DisplayPort on Ubuntu Status in linux-hwe-6.5 package in Ubuntu: Incomplete Bug description: Dear Ubuntu Bug Tracking Team, I hope this message finds you well. I am writing to report an issue I have encountered while using Ubuntu. Issue Description: When connecting my BenQ monitor to a Belkin docking station via DisplayPort, Ubuntu fails to detect the monitor. Other monitor connected to same docking station via hdmi is working Thank you for your attention to this matter. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: xorg 1:7.7+23ubuntu2 ProcVersionSignature: Ubuntu 6.5.0-17.17~22.04.1-generic 6.5.8 Uname: Linux 6.5.0-17-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.5 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: unknown CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Sat Feb 17 12:33:13 2024 DistUpgraded: 2022-09-23 16:50:19,545 DEBUG Running PostInstallScript: '/usr/lib/ubuntu-advantage/upgrade_lts_contract.py' DistroCodename: jammy DistroVariant: ubuntu DkmsStatus: nct6687d/20240204-100005, 6.5.0-17-generic, x86_64: installed ExtraDebuggingInterest: I just need to know a workaround GraphicsCard: Intel Corporation CometLake-U GT2 [UHD Graphics] [8086:9b41] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Lenovo CometLake-U GT2 [UHD Graphics] [17aa:22ac] InstallationDate: Installed on 2020-06-01 (1355 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) MachineType: LENOVO 20SDCTO1WW ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.5.0-17-generic root=UUID=b6e3b307-fcfb-4b70-ba21-5b72784f279c ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: Upgraded to jammy on 2022-09-23 (511 days ago) dmi.bios.date: 07/17/2023 dmi.bios.release: 1.25 dmi.bios.vendor: LENOVO dmi.bios.version: N2SET31W (1.25 ) dmi.board.asset.tag: Not Available dmi.board.name: 20SDCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.6 dmi.modalias: dmi:bvnLENOVO:bvrN2SET31W(1.25):bd07/17/2023:br1.25:efr1.6:svnLENOVO:pn20SDCTO1WW:pvrThinkPadX390:rvnLENOVO:rn20SDCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20SD_BU_Think_FM_ThinkPadX390: dmi.product.family: ThinkPad X390 dmi.product.name: 20SDCTO1WW dmi.product.sku: LENOVO_MT_20SD_BU_Think_FM_ThinkPad X390 dmi.product.version: ThinkPad X390 dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.113-2~ubuntu0.22.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 23.2.1-1ubuntu3.1~22.04.2 version.libgl1-mesa-glx: libgl1-mesa-glx 23.0.4-0ubuntu1~22.04.1 version.xserver-xorg-core: xserver-xorg-core 2:21.1.4-2ubuntu1.7~22.04.8 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.5/+bug/2054181/+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