Public bug reported:
**Title**
[Noble HWE 7.0][amdgpu][RX 6650 XT] Intermittent poweroff hang;
6.14.0-37 works, 7.0.0-28 and 7.0.0-29 fail
**Description**
I am experiencing an intermittent shutdown/poweroff hang after moving
from the Ubuntu Noble HWE 6.14 kernel to HWE 7.0.
The issue is reproducible with both:
* linux-image-7.0.0-28-generic 7.0.0-28.28~24.04.1
* linux-image-7.0.0-29-generic 7.0.0-29.29~24.04.2
The same machine shuts down reliably with:
* linux-image-6.14.0-37-generic 6.14.0-37.37~24.04.1
**Hardware**
Motherboard: Gigabyte B550M DS3H rev. 1.4
BIOS: FF, 2025-10-28
GPU: AMD Radeon RX 6650 XT (Navi 23), amdgpu driver
**Observed behaviour**
When the problem occurs, shutdown starts normally and the displays turn
off, but the computer does not complete the physical power-off.
Reboot does not exhibit the issue. I have never reproduced the problem
when rebooting the machine.
The issue can also occur with:
`sudo poweroff -f`
This suggests that the problem is not simply caused by a userspace
service failing to stop.
**Kernel comparison**
6.14.0-37-generic:
Poweroff works reliably.
7.0.0-28-generic:
Intermittent poweroff hang.
7.0.0-29-generic:
Intermittent poweroff hang.
Reboot with the 7.0 kernels:
Always works.
This therefore appears to be a regression introduced between the Ubuntu
HWE 6.14 and HWE 7.0 kernel series.
**Shutdown logs**
During a failed shutdown, userspace shutdown proceeds normally.
Docker completes its shutdown successfully and NetworkManager exits
successfully.
The journal reaches the final `systemd-shutdown` stage:
`systemd-shutdown[1]: Syncing filesystems and block devices.`
`systemd-shutdown[1]: Sending SIGTERM to remaining processes...`
The journal then stops as expected when systemd-journald is terminated.
Shortly before this final shutdown phase, the kernel repeatedly reports
messages similar to:
`workqueue: drm_fb_helper_damage_work hogged CPU for >10000us, consider
switching to WQ_UNBOUND`
I do not know whether this DRM warning is causal, but I am mentioning it
because it occurs immediately around the shutdown sequence on the
affected kernels.
**Related AMD shutdown fix**
Ubuntu kernel 6.14.0-37 includes the fixes for LP #2115860 (“Poweroff
not working consistently”), including several drm/amd shutdown/S5 fixes.
However, the relevant shutdown/S5 behaviour appears to already exist in
upstream Linux 7.0, so this does not appear to be simply a missing
backport of LP #2115860.
It may instead be a new regression in the 7.0 kernel series or an
interaction exposed by later DRM/AMDGPU changes.
**Steps to reproduce**
1. Boot kernel 7.0.0-28-generic or 7.0.0-29-generic.
2. Use the system normally.
3. Request a normal shutdown.
4. Intermittently, the displays turn off but the machine does not complete
power-off.
The same test has not reproduced the issue under 6.14.0-37-generic.
**Expected result**
The machine should completely power off.
**Actual result**
The shutdown sequence reaches its final stage, but the machine intermittently
remains powered instead of completing power-off.
---
ProblemType: Bug
ApportVersion: 2.28.3-0ubuntu0.1
Architecture: amd64
CRDA: N/A
CasperMD5CheckMismatches: ./boot/grub/efi.img
CasperMD5CheckResult: fail
CurrentDesktop: X-Cinnamon
DistroRelease: Linux Mint 22.3
InstallationDate: Installed on 2026-07-22 (27 days ago)
InstallationMedia: Linux Mint 22.3 "Zena" - Release amd64 20260108
IwConfig:
lo no wireless extensions.
enp6s0 no wireless extensions.
docker0 no wireless extensions.
MachineType: Gigabyte Technology Co., Ltd. B550M DS3H
Package: linux (not installed)
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-29-generic
root=UUID=94102f42-dca2-4dbb-a722-190ea16c6d05 ro amdgpu.runpm=0
systemd.log_level=debug systemd.log_target=kmsg printk.devkmsg=on
ignore_loglevel
ProcVersionSignature: Ubuntu 7.0.0-29.29~24.04.2-generic 7.0.12
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-7.0.0-29-generic N/A
linux-backports-modules-7.0.0-29-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.29
RfKill:
Tags: zena
Uname: Linux 7.0.0-29-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dialout dip docker i2c lpadmin ollama plugdev render
sambashare sudo users video
_MarkForUpload: True
dmi.bios.date: 10/28/2025
dmi.bios.release: 5.17
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: FF
dmi.board.asset.tag: Default string
dmi.board.name: B550M DS3H
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.:bvrFF:bd10/28/2025:br5.17:svnGigabyteTechnologyCo.,Ltd.:pnB550MDS3H:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnB550MDS3H:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:pfaB550MB:
dmi.product.family: B550 MB
dmi.product.name: B550M DS3H
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: apport-collected zena
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https://bugs.launchpad.net/bugs/2163945
Title:
[Noble HWE 7.0][amdgpu][RX 6650 XT] Intermittent poweroff hang;
6.14.0-37 works, 7.0.0-28 and 7.0.0-29 fail
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