[Bug 2166579] Re: System hangs on shutdown/restart via KDE Start Menu on ASUS ROG Crosshair VIII Hero (X570)

** Tags added: kernel-daily-bug -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2166579 Title: System hangs on shutdown/restart via KDE Start Menu on ASUS ROG Crosshair VIII Hero (X570) Status in linux package in Ubuntu: New Bug description: When attempting to shut down or restart the system using the KDE Plasma Start Menu / Session Manager on an ASUS ROG Crosshair VIII Hero (AMD X570) motherboard, the graphical session exits, but the system hangs indefinitely on a black screen with case fans and LEDs still powered on. Description: Ubuntu 26.04.1 LTS Release: 26.04 linux-image-generic: Installed: 7.0.0-31.31 Candidate: 7.0.0-31.31 Version table: *** 7.0.0-31.31 500 500 http://archive.ubuntu.com/ubuntu resolute-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu resolute-security/main amd64 Packages 100 /var/lib/dpkg/status 7.0.0-14.14 500 500 http://archive.ubuntu.com/ubuntu resolute/main amd64 Packages timothy@littlebullet:~$ Key Observations & Diagnostics: Direct Commands Work: Issuing direct kernel power commands (e.g., via custom desktop shortcuts or systemctl poweroff -i) powers down and restarts the motherboard and PSU cleanly every time, ruling out a physical motherboard ACPI or hardware power failure. Session Tear-Down Deadlock: The hang only occurs during the graphical session cleanup phase when initiated via the KDE Plasma UI, likely caused by an ACPI power-state transition deadlock or a driver failing to unhook during standard systemd user session shutdown. Hardware Context: Motherboard: ASUS ROG Crosshair VIII Hero (AMD X570) OS: Kubuntu (KDE Plasma) System configuration includes newly mounted local ext4 data drives under /mnt. New PSU has been installed Expected Behavior: Selecting "Shut Down" or "Restart" from the KDE Start Menu should cleanly terminate background processes, unmount filesystems, and pass power-off control to the Linux kernel/systemd without hanging. ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-31-generic 7.0.0-31.31 ProcVersionSignature: Ubuntu 7.0.0-31.31-generic 7.0.14 Uname: Linux 7.0.0-31-generic x86_64 ApportVersion: 2.34.1-0ubuntu0.1 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: KDE Date: Sat Sep 5 18:27:36 2026 InstallationDate: Installed on 2026-08-31 (5 days ago) InstallationMedia: Kubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423) MachineType: ASUS System Product Name ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-31-generic root=UUID=a6c2c797-ae1a-43cf-9e4c-b5e66c81bbfd ro quiet splash reboot=pci amdgpu.runpm=0 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/18/2026 dmi.bios.release: 5.17 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 5601 dmi.board.asset.tag: Default string dmi.board.name: ROG CROSSHAIR VIII HERO dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5601:bd08/18/2026:br5.17:svnASUS:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnROGCROSSHAIRVIIIHERO:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:skuSKU:pfaTobefilledbyO.E.M.: dmi.product.family: To be filled by O.E.M. dmi.product.name: System Product Name dmi.product.sku: SKU dmi.product.version: System Version dmi.sys.vendor: ASUS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2166579/+subscriptions