Public bug reported:
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
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2166579
Title:
System hangs on shutdown/restart via KDE Start Menu on ASUS ROG
Crosshair VIII Hero (X570)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2166579/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
