A black screen usually means there's a poor HDMI connection so getting a higher quality cable is advisable. It's all about the bandwidth. DisplayLink also makes the problem worse because you're limited to the bandwidth of a USB port which is usually MUCH lower than that of a native HDMI port. DisplayLink does some compression but that only goes so far.
This is almost certainly a hardware problem and you shouldn't try to run high refresh rate or high resolution monitors over DisplayLink. Such bugs can come and go as the quality of the connection changes over time, or as driver updates change how display bandwidth is detected. But if you want a reliable permanent solution then: 1. High refresh rate or high resolution monitors must not go through DisplayLink; and 2. Make sure you have high grade cabling - over spec for what you think you need. Looking at the machine specs (https://psref.lenovo.com/Product/IdeaPad/IdeaPad_Slim_5_14IAH8), I think the best option here is to use the: > 2x USB-C® 3.2 Gen 1 (support data transfer, Power Delivery 3.0 and DisplayPort™ 1.4) because those ports support high bandwidth DisplayPort. So all you need is some USB-C-to-DisplayPort or USB-C-to-HDMI cables (that are not DisplayLink adapters). ** Package changed: xorg (Ubuntu) => ubuntu ** Changed in: ubuntu Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/2102171 Title: Screen goes black (external monitor via displaylink) when set on 100hz Status in Ubuntu: Invalid Bug description: When I connect my display link usb-c to hdmi, it is capable of 50hz, but wont show image when set on 100hz. It used to work some days ago with other adapters. Stopped working out of the no-where. ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: xorg 1:7.7+23ubuntu3 ProcVersionSignature: Ubuntu 6.11.0-19.19~24.04.1-generic 6.11.11 Uname: Linux 6.11.0-19-generic x86_64 ApportVersion: 2.28.1-0ubuntu3.3 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: pass CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Wed Mar 12 22:39:01 2025 DistUpgraded: Fresh install DistroCodename: noble DistroVariant: ubuntu DkmsStatus: evdi/1.14.8, 6.11.0-19-generic, x86_64: installed ExtraDebuggingInterest: I just need to know a workaround GraphicsCard: Intel Corporation Alder Lake-P GT1 [UHD Graphics] [8086:46a3] (rev 0c) (prog-if 00 [VGA controller]) Subsystem: Lenovo Alder Lake-P GT1 [UHD Graphics] [17aa:3c45] InstallationDate: Installed on 2025-01-23 (48 days ago) InstallationMedia: Ubuntu 24.04.1 LTS "Noble Numbat" - Release amd64 (20240827.1) MachineType: LENOVO 83BF ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.11.0-19-generic root=UUID=abc9007c-57cd-4363-8bba-849b2c646af5 ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/13/2024 dmi.bios.release: 1.38 dmi.bios.vendor: LENOVO dmi.bios.version: LACN38WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: SDK0T76463 WIN dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: IdeaPad Slim 5 14IAH8 dmi.ec.firmware.release: 1.38 dmi.modalias: dmi:bvnLENOVO:bvrLACN38WW:bd12/13/2024:br1.38:efr1.38:svnLENOVO:pn83BF:pvrIdeaPadSlim514IAH8:rvnLENOVO:rnLNVNB161216:rvrSDK0T76463WIN:cvnLENOVO:ct10:cvrIdeaPadSlim514IAH8:skuLENOVO_MT_83BF_BU_idea_FM_IdeaPadSlim514IAH8: dmi.product.family: IdeaPad Slim 5 14IAH8 dmi.product.name: 83BF dmi.product.sku: LENOVO_MT_83BF_BU_idea_FM_IdeaPad Slim 5 14IAH8 dmi.product.version: IdeaPad Slim 5 14IAH8 dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.122-1~ubuntu0.24.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 24.2.8-1ubuntu1~24.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1.2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1build1 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/+bug/2102171/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
