Thanks for the bug report. When the monitor is plugged into HDMI, please run:
sudo apt install drm-info drm_info > drminfo.txt grep . /sys/class/drm/*/status > connections.txt and attach the resulting text files here. It might also be worth testing this in /etc/environment: MUTTER_DEBUG_ENABLE_ATOMIC_KMS=0 and rebooting. Finally, the attached 'CurrentDmesg.txt' shows the Intel graphics kernel driver is crashing. So trying a newer kernel may help: https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=M;O=D ** Summary changed: - no signal to external monitor from HDMI port + [ASUS EXPERTBOOK B9400CBA] No signal to external monitor from HDMI port ** Changed in: mutter (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/2027631 Title: [ASUS EXPERTBOOK B9400CBA] No signal to external monitor from HDMI port Status in mutter package in Ubuntu: Incomplete Bug description: On fresh installation of Ubuntu 22.04.2 LTS with and without latest updates there's no HDMI signal to external monitor. No display , no picture, no detection at all. The hardware is functional under Windows the HDMI port is working. What I've managed to research is some problems with Intel 12th gen CPU GPUs drivers where other user have similar problem. Some sources mention Wayland protocol as part of the problem but cannot clarify how reliable that is. Tried changing display protocols on login but it didn't help. CPU i7-1255U , notebook: ASUS Expertbook B9400 CBA ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: xorg 1:7.7+23ubuntu2 ProcVersionSignature: Ubuntu 5.19.0-46.47~22.04.1-generic 5.19.17 Uname: Linux 5.19.0-46-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.5 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: pass CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Thu Jul 13 00:53:19 2023 DistUpgraded: Fresh install DistroCodename: jammy DistroVariant: ubuntu GraphicsCard: Intel Corporation Device [8086:46a8] (rev 0c) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device [1043:1f02] InstallationDate: Installed on 2023-07-12 (0 days ago) InstallationMedia: Ubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223) Lsusb: Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 003 Device 002: ID 8087:0033 Intel Corp. Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: ASUSTeK COMPUTER INC. ASUS EXPERTBOOK B9400CBA_B9400CBA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.19.0-46-generic root=UUID=28808a14-059c-4b86-a687-ebd6d7ad1b12 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/26/2022 dmi.bios.release: 5.26 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: B9400CBA.214 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: B9400CBA dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrB9400CBA.214:bd09/26/2022:br5.26:svnASUSTeKCOMPUTERINC.:pnASUSEXPERTBOOKB9400CBA_B9400CBA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnB9400CBA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:sku: dmi.product.family: ASUS EXPERTBOOK dmi.product.name: ASUS EXPERTBOOK B9400CBA_B9400CBA dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.113-2~ubuntu0.22.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 22.2.5-0ubuntu0.1~22.04.3 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:21.1.4-2ubuntu1.7~22.04.1 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/mutter/+bug/2027631/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
