Public bug reported:
Ubuntu release:
Ubuntu 26.04 LTS (Kubuntu, resolute), amd64
Hardware:
- GPU: PowerColor AMD Radeon RX 9060 XT / Navi 44 [1002:7590], subsystem
[148c:2437]
- Motherboard: Gigabyte B650 GAMING X AX V2 rev. 1.2
- BIOS: F41 dated 2026-05-21
- Secure Boot: enabled
- All monitors are connected to the RX 9060 XT
- The Ryzen integrated GPU has been disabled in BIOS for an additional
isolation test
Current relevant software:
- Failing kernel: Ubuntu 7.0.0-29.29-generic (upstream base 7.0.12)
- AMD graphics firmware: linux-firmware-amd-graphics
20260319.git217ca6e4-0ubuntu3.1
- Kernel driver: amdgpu
Problem:
Poweroff intermittently fails at the final stage. The displays and USB
devices turn off, but the computer remains powered indefinitely: the
case power light remains on and the fans appear to continue running. A
hard reset/power-off is then required.
The failure occurs both when shutting down from KDE and with:
sudo systemctl poweroff
It also occurred after shutting down from SDDM, so it is not dependent
on a logged-in KDE session. Persistent journal logging reaches systemd-
shutdown, filesystem synchronization, and process termination, then
stops without recording the component that prevents final power removal.
Expected result:
The machine should completely power off within several seconds, as it
does with kernel 7.0.0-22 and when amdgpu is bypassed with nomodeset.
Reproduction:
1. Boot Ubuntu normally using kernel 7.0.0-29-generic with amdgpu loaded.
2. Run `sudo systemctl poweroff` or select Shut Down from KDE.
3. Repeat the boot/poweroff cycle because the failure is intermittent.
4. On a failed attempt, the displays and USB devices turn off but the power LED
and fans remain on indefinitely.
Isolation results:
- Kernel 7.0.0-29 with normal amdgpu operation: intermittent poweroff hangs
reproduced multiple times.
- Kernel 7.0.0-27 with normal amdgpu operation: hung on the first shutdown test.
- The problem was already observed with kernel 7.0.0-28 and remains present
with 7.0.0-29.
- Kernel 7.0.0-29 booted with `nomodeset`: 5 out of 5 shutdown tests completed
cleanly and almost immediately.
- Kernel 7.0.0-22 with normal amdgpu operation: 4 out of 4 shutdown tests
completed cleanly and quickly.
- Fedora Workstation 44 live USB with normal graphics: 3 out of 3 shutdown
tests completed cleanly.
- Disabling the unused Ryzen/Raphael integrated GPU in BIOS did not help; the
first normal shutdown with only the RX 9060 XT present hung.
- Updating the motherboard BIOS to F41 did not help.
- `amdgpu.runpm=0` did not resolve the problem.
- Stopping OneDrive before shutdown did not help.
- The failure has occurred after KDE, SDDM, and direct systemctl poweroff
tests, making a KDE session or ordinary userspace service unlikely to be
necessary for the failure.
This appears to be a regression in the Ubuntu kernel's amdgpu shutdown
path between Ubuntu kernels 7.0.0-22 (upstream base 7.0.0) and 7.0.0-27
(upstream base 7.0.6). I can test additional proposed kernels if
requested.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-29-generic 7.0.0-29.29
ProcVersionSignature: Ubuntu 7.0.0-29.29-generic 7.0.12
Uname: Linux 7.0.0-29-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: chrism 2704 F.... wireplumber
/dev/snd/controlC1: chrism 2704 F.... wireplumber
/dev/snd/controlC0: chrism 2704 F.... wireplumber
/dev/snd/seq: chrism 2699 F.... pipewire
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Wed Aug 5 12:08:19 2026
InstallationDate: Installed on 2026-03-24 (135 days ago)
InstallationMedia: Kubuntu 25.10 "Questing Quokka" - Release amd64 (20251007)
IwDevWlp9s0Link: Not connected.
MachineType: Gigabyte Technology Co., Ltd. B650 GAMING X AX V2
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-29-generic
root=UUID=618adf22-c64b-4c7d-8b93-6242ab08ed44 ro
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: linux
UpgradeStatus: Upgraded to resolute on 2026-05-18 (79 days ago)
dmi.bios.date: 05/21/2026
dmi.bios.release: 5.41
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: F41
dmi.board.asset.tag: Default string
dmi.board.name: B650 GAMING X AX V2
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrF41:bd05/21/2026:br5.41:svnGigabyteTechnologyCo.,Ltd.:pnB650GAMINGXAXV2:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnB650GAMINGXAXV2:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:pfaB650MB:
dmi.product.family: B650 MB
dmi.product.name: B650 GAMING X AX V2
dmi.product.sku: Default string
dmi.product.version: Default string
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2162928
Title:
[amdgpu][Navi 44] Intermittent poweroff hang on 7.0.0-27/28/29;
7.0.0-22 and nomodeset shut down reliably
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