You have been subscribed to a public bug: I have an LG 34WK95U monitor which appears to be tiled using two diplay port interfaces connect over thunderbolt. I'm unable to get ubuntu to drive the monitor at it's full 5120x2160@60 resolution.
Manually I can force it to 5120x2160@30, but by default Ubuntu gives me 3440x1440@60. I've been researching what the problem might be, my findings so far are collected in these two questions on askubuntu https://askubuntu.com/questions/1233284/tiled-monitor-support-lg-34wk95u https://askubuntu.com/questions/1230124/high-res-monitor-support-5120x2160-lg-34wk95 I've tried switching my laptop gpu from NVidia to the built-in Intel, but the problem persists. The monitor worked in Windows before I wiped the laptop to install Ubuntu. So I'm stuck with the conclusion that there is a bug somewhere at a lower layer preventing this from working since none of the things I've tested have worked. Ideally this should of course have worked out of the box as on Windows. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30 Uname: Linux 5.4.0-28-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia .proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:01:00.0' .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.suspend: suspend hibernate resume .proc.driver.nvidia.suspend_depth: default modeset uvm .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 440.64 Fri Feb 21 01:17:26 UTC 2020 GCC version: gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2) ApportVersion: 2.20.11-0ubuntu27 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: ubuntu:GNOME Date: Mon May 4 12:33:55 2020 DistUpgraded: Fresh install DistroCodename: focal DistroVariant: ubuntu DkmsStatus: nvidia, 440.64, 5.4.0-28-generic, x86_64: installed ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation UHD Graphics 630 (Mobile) [8086:3e9b] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Dell UHD Graphics 630 (Mobile) [1028:0906] Subsystem: Dell TU117GLM [Quadro T2000 Mobile / Max-Q] [1028:0906] InstallationDate: Installed on 2020-04-24 (10 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) MachineType: Dell Inc. Precision 5540 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-28-generic root=/dev/mapper/vgubuntu-root ro quiet splash SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/25/2019 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.5.0 dmi.board.name: 0FMYX6 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.5.0:bd12/25/2019:svnDellInc.:pnPrecision5540:pvr:rvnDellInc.:rn0FMYX6:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: Precision dmi.product.name: Precision 5540 dmi.product.sku: 0906 dmi.sys.vendor: Dell Inc. version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.101-2 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2 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+git20200226-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: amd64 apport-bug focal ubuntu -- TILEd monitor not getting full res https://bugs.launchpad.net/bugs/1876706 You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. -- 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
