I understand the frustration with how random the issue is, I've been there before. I can only recommend:
* Avoid docks if you need to drive high bandwidth displays. * Have other brands of cables on hand to try. Including a direct USB-C to DisplayPort cable. * Try fewer monitors. You should be able to test things slowly: 1. Laptop works perfectly by itself with nothing connected. 2. Laptop works perfectly with one monitor directly connected. 3. And so on. Stop when things stop working reliably and go back to retest the previous setup. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-hwe-6.11 in Ubuntu. https://bugs.launchpad.net/bugs/2106371 Title: 32:9 resolution missing Status in linux-hwe-6.11 package in Ubuntu: Opinion Bug description: From time to time, my screen monitor resolution disappears and I end up with a very bugy display (flicking) or forced to use a completely flatten 16:9 one on my ultra wide monitor (samsung odyssey G9) ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: xorg 1:7.7+23ubuntu3 ProcVersionSignature: Ubuntu 6.11.0-21.21~24.04.1-generic 6.11.11 Uname: Linux 6.11.0-21-generic x86_64 ApportVersion: 2.28.1-0ubuntu3.5 Architecture: amd64 BootLog: Error: [Errno 13] Permission non accordée: '/var/log/boot.log' CasperMD5CheckResult: pass CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Mon Apr 7 10:14:03 2025 DistUpgraded: Fresh install DistroCodename: noble DistroVariant: ubuntu ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation Alder Lake-UP3 GT2 [Iris Xe Graphics] [8086:46a8] (rev 0c) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Alder Lake-UP3 GT2 [Iris Xe Graphics] [103c:8aa1] InstallationDate: Installed on 2024-09-26 (193 days ago) InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424) MachineType: HP HP ProBook 450 15.6 inch G9 Notebook PC ProcEnviron: LANG=fr_FR.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.11.0-21-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/10/2024 dmi.bios.release: 11.4 dmi.bios.vendor: HP dmi.bios.version: U85 Ver. 01.11.04 dmi.board.name: 8AA1 dmi.board.vendor: HP dmi.board.version: KBC Version 21.6B.00 dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.ec.firmware.release: 33.107 dmi.modalias: dmi:bvnHP:bvrU85Ver.01.11.04:bd05/10/2024:br11.4:efr33.107:svnHP:pnHPProBook45015.6inchG9NotebookPC:pvrSBKPF:rvnHP:rn8AA1:rvrKBCVersion21.6B.00:cvnHP:ct10:cvr:sku6A284EA#ABF: dmi.product.family: 103C_5336AN HP ProBook dmi.product.name: HP ProBook 450 15.6 inch G9 Notebook PC dmi.product.sku: 6A284EA#ABF dmi.product.version: SBKPF dmi.sys.vendor: HP 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 2:21.1.12-1ubuntu1.3 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/+source/linux-hwe-6.11/+bug/2106371/+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
