Hello developers, I am experiencing a persistent shutdown issue after upgrading to the latest kernel branches. When triggering a normal power-off from KDE Plasma or the terminal (sudo poweroff / shutdown now), the operating system shuts down successfully and the screen goes black, but the hardware remains fully powered. Motherboard lights, CPU/chassis fans, and the GPU remain running indefinitely.
This issue is present in the latest Kernel 7.1 / 7.2 release candidate branches in CachyOS, suggesting a regression or compatibility issue with the ACPI power state transitions (specifically entering the S5 state) on this specific hardware combination.
Hardware Specifications:
Motherboard: Gigabyte B550 Eagle WiFi 6 (rev. 1.0)
CPU: AMD Ryzen 5 5500
GPU: AMD Radeon RX 5500 XT
PSU: Corsair RM750x
Storage: NVMe SSD (XFS Filesystem)
Desktop Environment: KDE Plasma
Bootloader: GRUB
Troubleshooting & Behavior Observed:
Standard Shutdown: OS halts, display turns off, but the PSU stays active, keeping fans and LEDs powered.
Systemd Tweaks: Changing DefaultTimeoutStopSec=4s in systemd.conf had no effect (no rogue services hanging the process).
Kernel Parameters: Adding acpi=force or nowatchdog to the GRUB command line did not resolve the issue.
SysRq: The Magic SysRq combo (Alt + PrintScreen + O) successfully shuts down the system immediately.
Forced Poweroff: The machine only powers off completely when bypassing standard kernel ACPI interaction via terminal using:
sudo poweroff -f
Workaround currently used:
I had to write a custom bash script that triggers a clean KDE session logout (qdbus), syncs/unmounts the drives, and then forces the hardware cutoff using poweroff -f to avoid pulling the plug physically.
Please let me know if you need any specific ACPI dumps (acpidump), journalctl logs from the failed halt sequence, or further tests on this B550/Ryzen platform. Thank you for your amazing work on CachyOS!
I’m running into the same issue, which I believe it started on Saturday. I update every day and shut down the computer at the end of the day. Since Sunday morning ,when I turned on the computer for the first time that day, it was still powered on, but everything was blank. Fans running, but nothing responsive. I have to hit the physical reset button or hold down the power button to start it back up again. It can happen on a reboot or shutdown, and not every time. I haven’t been able to recreating it yet booting into the the LTS kernel and never had anything like this happen before.
journalctl -b -1 shows nothing interesting.
Jun 25 19:36:05 cachyos systemd[1]: systemd-tmpfiles-setup-dev.service: Deactivated successfully.
Jun 25 19:36:05 cachyos systemd[1]: Stopped Create Static Device Nodes in /dev.
Jun 25 19:36:05 cachyos systemd[1]: systemd-sysusers.service: Deactivated successfully.
Jun 25 19:36:05 cachyos systemd[1]: Stopped Create System Users.
Jun 25 19:36:05 cachyos systemd[1]: systemd-remount-fs.service: Deactivated successfully.
Jun 25 19:36:05 cachyos systemd[1]: Stopped Remount Root and Kernel File Systems.
Jun 25 19:36:05 cachyos systemd[1]: systemd-tmpfiles-setup-dev-early.service: Deactivated successfully.
Jun 25 19:36:05 cachyos systemd[1]: Stopped Create Static Device Nodes in /dev gracefully.
Jun 25 19:36:05 cachyos systemd[1]: systemd-zram-setup@zram0.service: Deactivated successfully.
Jun 25 19:36:05 cachyos systemd[1]: Stopped Create swap on /dev/zram0.
Jun 25 19:36:05 cachyos systemd[1]: Removed slice Slice /system/systemd-zram-setup.
Jun 25 19:36:05 cachyos systemd[1]: lvm2-monitor.service: Deactivated successfully.
Jun 25 19:36:05 cachyos systemd[1]: Stopped Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progress polling.
Jun 25 19:36:05 cachyos systemd[1]: Reached target System Shutdown.
Jun 25 19:36:05 cachyos systemd[1]: Reached target Late Shutdown Services.
Jun 25 19:36:05 cachyos systemd[1]: systemd-reboot.service: Deactivated successfully.
Jun 25 19:36:05 cachyos systemd[1]: Finished System Reboot.
Jun 25 19:36:05 cachyos systemd[1]: Reached target System Reboot.
Jun 25 19:36:05 cachyos systemd[1]: Shutting down.
Jun 25 19:36:05 cachyos systemd-shutdown[1]: Syncing filesystems and block devices.
Jun 25 19:36:05 cachyos systemd-shutdown[1]: Sending SIGTERM to remaining processes…
Jun 25 19:36:05 cachyos systemd-journald[464]: Received SIGTERM from PID 1 (systemd-shutdow).
Jun 25 19:36:05 cachyos systemd-journald[464]: Journal stopped
I have this issue since 7.1 rc. It’s all related to new amd_dynamic epp features introduced in 7.1.
It seems to work if you logout from desktop session first and poweroff afterwards.
On my second partition I installed Manjaro and installed latest Kernel 7.2 rc0.
It’s all working there.
I have had the same problem since I updated my system on Wednesday. When I trigger shutdown via niri, the computer cannot really power off. The monitor turns black but the power light stays on, and the fan keeps running. Once time I forgot to check my laptop status after shutdowned, so this situation kept going for 4 hours. When I realized something was wrong, I found my laptop was very hot.
kernel: Linux 7.1.1-2-cachyos, Desktop: niri, DankMaterialShell
Im complete nob in linux ( 3days testing and learning im born with windows in my a… ) hope im not put in spam but i use and AI to teach me where im stuck so this is my spec file for devs 4e0d1ca and i manage to fix the problem with stable kernel on CachyOS LXQT envirement fast steps in my case :
1 - CachyOS Kernel Manager
2 - Im with the newest ( not working cachyos-v3/linux-cachyos 7.1.1-2 stable ) i chose the lower one cachyos-v3/linux-cachyos-lts 6.18.36-1 longterm and install + restart
3 - Bios Enable :
Above 4G memory,Power Led-Dual Color,Erp Ready-Enable,Bios Uefi/csm mode-Uefi,Secure Boot-disable and last in Boot Options :
1st- Limine
2econd - Uefi os Sata1…
i must emphasize it if you use legacy not uefi to install your OS the second step will brake your OS ( you must install your OS in UEFI mode )
4 - after restart in before log in section need to select the latest installed core in my case its ( lts ) after that everything working perfectly and the OS even remember last choise ( not need to search in list and choose )
Im not completly shure are everything have meaningfull efect but with the AI this steps make my CachyOS perfectly working I wish you all success
Postcript :
I’m not sure for you people but this operating system is still far faaaar away from the word gaming ( so much problems , so much dependency , redactions not to mention the bios settings ) but yes if we count the gaming package in wellcome screen and the several minor fps improvments in games ( there is no left time to play the actual game ! ) yes somebody may be can see somthing fun/intresting in it .
I might have figured it out, at least me for me. Anyone here have the issue with an AMD GPU and multiple displays? Does the issue not happen if only one display is connected? Second screens can’t just be disabled, but physically disconnected/unplugged.
Interesting. I will check tomorrow when I’m back home.
In fact I have a laptop with external hdmi monitor. I’m only working with the big external screen…
) i chose the lower one cachyos-v3/linux-cachyos-lts 6.18.36-1 longterm and install + restart
but yes if we count the gaming package in wellcome screen and the several minor fps improvments in games ( there is no left time to play the actual game ! ) yes somebody may be can see somthing fun/intresting in it .