Thanks Daniel, As I currently have a correct resolution setting at work (see #2) without any hardware replacement, I don't think this is a hardware (cable) problem. I'll test this evening at home again, as well as with a new kernel.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1995749 Title: [i915] Maximum resolution not available after suspend / screen detach Status in linux package in Ubuntu: Confirmed Bug description: I have a fresh install of Ubuntu 22.04.3, using the default Wayland, on my laptop which is used at two locations: - at work I have my primary built-in 4K display and 2 additional 1920x1080 monitor connected to a HP DisplayLink docking station using DP, connected to my laptop using USB-C - at home, I have my primary built-in 4K display and an additional 4x monitor directly connected using the mini-DP After boot, everything works perfect. However, after working at work, putting the laptop into suspend (by closing the lid), attaching to my monitor at home and opening the lid again, I get my external display at a poor resolution which I cannot change to 4K in the settings menu: the 4K resolution is not available. Also in xrandr, the 4K resolution is not available. The resolution is however correctly provided by the monitor at all times: $ sudo get-edid -b 8 | parse-edid 8 This is read-edid version 3.0.2. Prepare for some fun. Attempting to use i2c interface Only trying 8 as per your request. 256-byte EDID successfully retrieved from i2c bus 8 Looks like i2c was successful. Have a good day. Checksum Correct Section "Monitor" Identifier "PHL 328P6V" ModelName "PHL 328P6V" VendorName "PHL" # Monitor Manufactured week 30 of 2020 # EDID version 1.4 # Digital Display DisplaySize 700 400 Gamma 2.20 Option "DPMS" "true" Horizsync 30-160 VertRefresh 23-80 # Maximum pixel clock is 600MHz #Not giving standard mode: 1920x1080, 60Hz #Not giving standard mode: 1280x1024, 60Hz #Not giving standard mode: 1280x960, 60Hz #Not giving standard mode: 1440x900, 75Hz #Not giving standard mode: 1440x900, 60Hz #Not giving standard mode: 1680x1050, 60Hz #Not giving standard mode: 1280x720, 60Hz #Extension block found. Parsing... Modeline "Mode 12" 262.75 3840 3888 3920 4000 2160 2163 2168 2191 +hsync -vsync Modeline "Mode 0" 533.25 3840 3888 3920 4000 2160 2163 2168 2222 +hsync -vsync Modeline "Mode 1" 148.500 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync Modeline "Mode 2" 148.500 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync Modeline "Mode 3" 74.250 1280 1390 1420 1650 720 725 730 750 +hsync +vsync Modeline "Mode 4" 74.250 1280 1720 1760 1980 720 725 730 750 +hsync +vsync Modeline "Mode 5" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync Modeline "Mode 6" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync Modeline "Mode 7" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync Modeline "Mode 8" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync Modeline "Mode 9" 25.200 640 656 752 800 480 490 492 525 -hsync -vsync Modeline "Mode 10" 74.250 1920 2008 2052 2200 1080 1082 1087 1125 +hsync +vsync interlace Modeline "Mode 11" 74.250 1920 2448 2492 2640 1080 1082 1089 1125 +hsync +vsync interlace Modeline "Mode 13" 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync Modeline "Mode 14" 277.25 1920 1968 2000 2080 2160 2163 2173 2222 +hsync -vsync Modeline "Mode 15" 147.17 2048 2096 2128 2208 1080 1083 1093 1111 +hsync -vsync Option "PreferredMode" "Mode 12" EndSection Previously, using Ubuntu 20.04, I've had the same issue using Xorg, which could easily be solved by unplugging the external monitor and plugging in back again, which worked most of the times, sometimes only after a few retries. Now, with Ubuntu 22.04.3 and Wayland, this doesn't work anymore. Logging out in this situation and logging in again in an Xorg session doesn't help either. Only a reboot seems to help. Additional debug information at a situation with wrong resolution can be provided on Monday, as I just rebooted again :-) ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: xorg 1:7.7+23ubuntu2 ProcVersionSignature: Ubuntu 5.15.0-52.58-generic 5.15.60 Uname: Linux 5.15.0-52-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.1 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: pass CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Fri Nov 4 23:29:27 2022 DistUpgraded: Fresh install DistroCodename: jammy DistroVariant: ubuntu DkmsStatus: evdi/1.12.0, 5.15.0-52-generic, x86_64: installed virtualbox/6.1.38, 5.15.0-52-generic, x86_64: installed GraphicsCard: Intel Corporation CometLake-U GT2 [UHD Graphics] [8086:9b41] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Dell CometLake-U GT2 [UHD Graphics] [1028:0962] InstallationDate: Installed on 2022-10-21 (14 days ago) InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1) MachineType: Dell Inc. XPS 13 7390 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-52-generic root=UUID=705d5852-b587-45b3-9684-6ed297c1e3f2 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/09/2022 dmi.bios.release: 1.16 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.16.0 dmi.board.name: 0G2D0W dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.16.0:bd06/09/2022:br1.16:svnDellInc.:pnXPS137390:pvr:rvnDellInc.:rn0G2D0W:rvrA00:cvnDellInc.:ct10:cvr:sku0962: dmi.product.family: XPS dmi.product.name: XPS 13 7390 dmi.product.sku: 0962 dmi.sys.vendor: Dell Inc. version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.110-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 22.0.5-0ubuntu0.1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:21.1.3-2ubuntu2.2 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/+bug/1995749/+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
