I have tested the issue on the live 20.04.5 ISO usb, and the issue occurs in the Live config.
If I choose the Safe Graphics config - the issue does NOT happen. My view of what is happening in the Safe Graphics mode that is notably different is that my "main monitor" never fully powers off when Blanking kicks in. This means there is always a display for the OS/driver to refer to. On my normal/default mode, the main monitor actually turns off (both monitors turn off) and I am immediately unable to wake them. I suspect there is some major issue when the count of displays present/connected becomes zero. That's my best guess. -- 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/1999189 Title: Displayport monitors hang on blanking and must REISUB my 20.04.5 system Status in linux package in Ubuntu: Confirmed Bug description: I've been getting issues with my 2 DP monitors (and system) not recovering from blanking (possibly 100% of the time). If I disable blanking, the issue never occurs. Otherwise, I am forced to REISUB the system to regain access. As I'm using amdgpu from the HWE kernel, my best guess is thats where the issue lies. When the issue occurs I am completely unable to access the system due to a softlock and CPU getting maxed by Xorg. SSH barely works and the system doesn't respond to request to perform dumps like Alt- PrintScreen-1. The only relevant output I have seen (as a user) is in syslog, and possibly dmesg. In addition, when I try to submit an apport-bug it fails (multiple times). Here is the Error ID: OOPS-108b77945d65b4a0f23eba000f0d8a8e while trying to wait for the launchpad page to process my data. Finally, as I'm more of a user, I can only likely manage to test anything with some decent instructions. This issue has been going on for a few weeks, and due to a recent hardware change I cannot confirm if there was a time when my current system did not have the issue. OS: Description: Ubuntu 20.04.5 LTS Release: 20.04 System: Asus PN51-E1 (minipc), 32 GB RAM, AMD Ryzen 7 5700U with Radeon Graphics 2 DP monitors DP to DP cable USB-C to DP cable (tested without this connected and it makes no difference) --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.24 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: test 20733 F.... pulseaudio /dev/snd/controlC0: test 20733 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2022-02-17 (294 days ago) InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819) MachineType: ASUSTeK COMPUTER INC. MINIPC PN51-E1 Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-56-generic root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 5.15.0-56.62~20.04.1-generic 5.15.64 RelatedPackageVersions: linux-restricted-modules-5.15.0-56-generic N/A linux-backports-modules-5.15.0-56-generic N/A linux-firmware 1.187.35 Tags: focal Uname: Linux 5.15.0-56-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: N/A WifiSyslog: _MarkForUpload: True dmi.bios.date: 06/21/2021 dmi.bios.release: 5.3 dmi.bios.vendor: ASUSTeK COMPUTER INC. dmi.bios.version: 0503 dmi.board.asset.tag: Default string dmi.board.name: PN51-E1 dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: To be filled by O.E.M. dmi.chassis.asset.tag: Default string dmi.chassis.type: 35 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnASUSTeKCOMPUTERINC.:bvr0503:bd06/21/2021:br5.3:svnASUSTeKCOMPUTERINC.:pnMINIPCPN51-E1:pvr0503:rvnASUSTeKCOMPUTERINC.:rnPN51-E1:rvrTobefilledbyO.E.M.:cvnDefaultstring:ct35:cvrDefaultstring:sku: dmi.product.family: Vivo PC dmi.product.name: MINIPC PN51-E1 dmi.product.version: 0503 dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1999189/+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
