Public bug reported: **Title:** Poweroff hangs at the final stage (PSU stays on, fans ramp up) on 7.0.0-31-generic, AM5 B850 + Radeon RX 9060 XT; mainline 7.2.6 is fine
**Summary** After upgrading from Ubuntu 24.04 to 26.04.1, `poweroff` no longer completes on my desktop. Userspace shuts down cleanly, then the monitors and USB keyboard/mouse lose power, the fans ramp up, but the machine never actually powers off (ACPI S5 is not reached). I have to hold the power button. With the same hardware and BIOS settings, Windows 11 (dual boot) shuts down correctly, and so does mainline kernel 7.2.6 from kernel.ubuntu.com/mainline. It never happened on 24.04. **Environment** - Ubuntu 26.04.1 LTS, kernel 7.0.0-31-generic (also 7.0.0-30 installed; not tested separately) - Mainline 7.2.6-070206-generic (unsigned, from kernel.ubuntu.com/mainline): all shutdowns since then completed cleanly ([N] in a row) - UEFI boot, Secure Boot disabled - linux-firmware 20260319.git217ca6e4 (linux-firmware-amd-graphics 20260319.git217ca6e4-0ubuntu3.1) - Board: Gigabyte B850 AORUS ELITE WIFI7 ICE, BIOS F12c (AGESA ComboAm5PI 1.3.0.1c), up to date - CPU: AMD Ryzen 9 7950X; RAM: 2x32 GB DDR5 (EXPO off) - GPU: ASUS Radeon RX 9060 XT (Navi 44, 1002:7590), amdgpu; the CPU's integrated GPU (Raphael, 1002:164e) is currently disabled in BIOS (was enabled at first, no difference) - Other devices: Intel X550-T2 (ixgbe), Realtek RTL8922AE Wi-Fi (rtw89_8922ae) + Realtek USB Bluetooth (btusb), Realtek RTL8125 (r8169), 2x WD NVMe **Symptoms** - The journal of the affected boot (`journalctl -b -1`) is complete and clean up to `systemd-shutdown: Sending SIGTERM to remaining processes...` followed by `Journal stopped`. All filesystems are unmounted properly, swap is deactivated, poweroff.target is reached. Nothing after that is logged. - Then: displays go dark, keyboard/mouse lose power, fans spin faster, the PSU/board stays powered. - It is intermittent and state-dependent: one shutdown shortly after a fresh boot worked, while shutdowns after about 10 minutes of normal use (browser, writing an ISO to a USB stick) hung. The list of loaded modules (`lsmod`) is identical right after boot and right before the hanging shutdown. - No amdgpu warnings/errors in `journalctl -k` for that boot. **What I tried (no effect on 7.0.0-31)** - Removing `acpi=force` from the kernel command line - BIOS: Fast Boot off, ErP on, integrated graphics disabled - BIOS is on the latest release (F12c) **What did help** - Booting 7.0.0-31 with `nomodeset` (amdgpu not loaded) seemed to shut down more reliably, which points at amdgpu/DRM shutdown handling. This is not conclusive yet. - Mainline 7.2.6: no hang so far. **Possibly related** A similar report (poweroff stops after "Sending SIGTERM to remaining processes...", fans and LEDs stay on) exists for an RX 6800 on CachyOS, where a responder said it appeared to be fixed by 7.2-rc1: https://ratatoskr.run/amd-gfx/2026/07/17202822/t **Request** Could you check which upstream changes between 7.0 and 7.2 (amdgpu / PM / ACPI) fix this and backport them to the 26.04 kernel? I am happy to test PPA kernels or bisect if you tell me how. `ubuntu-bug` attachments (lspci -nnk, dmesg, journal) are included below. **Steps to reproduce** 1. Boot 7.0.0-31-generic, log in to GNOME. 2. Use the system for roughly 10 minutes (browser, disk activity, USB stick write). 3. Choose Shut Down (or `sudo systemctl poweroff`). 4. Machine does not power off; fans ramp up; hard power-off required. 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 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: lauritz 7196 F.... wireplumber /dev/snd/controlC0: lauritz 7196 F.... wireplumber /dev/snd/seq: lauritz 7176 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sun Sep 27 17:12:45 2026 InstallationDate: Installed on 2025-11-15 (316 days ago) InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64 (20250805.1) MachineType: Gigabyte Technology Co., Ltd. B850 AORUS ELITE WIFI7 ICE ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-31-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M 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 2026-06-14 (105 days ago) dmi.bios.date: 07/21/2026 dmi.bios.release: 5.41 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: F12c dmi.board.asset.tag: Default string dmi.board.name: B850 AORUS ELITE WIFI7 ICE 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.:bvrF12c:bd07/21/2026:br5.41:svnGigabyteTechnologyCo.,Ltd.:pnB850AORUSELITEWIFI7ICE:pvrDefaultstring-WCP-ADO:rvnGigabyteTechnologyCo.,Ltd.:rnB850AORUSELITEWIFI7ICE:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:pfaB850MB: dmi.product.family: B850 MB dmi.product.name: B850 AORUS ELITE WIFI7 ICE dmi.product.sku: Default string dmi.product.version: Default string-WCP-ADO dmi.sys.vendor: Gigabyte Technology Co., Ltd. ** 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/2168673 Title: Poweroff hangs at the final stage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2168673/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
