Sudden hard power-off (CF9 reset 0xE) on ASUS laptop - firmware

Allen Eveland · 2026-02-09 15:42:52

System Overview
----------------
Laptop platform running Arch Linux (x86_64), GNOME desktop.
Kernel: Linux 6.18.8-arch2-1 (PREMPT_DYNAMIC)
Boot mode: UEFI
Model name: AMD Ryzen 5 7535HS with Radeon Graphics
GPU: GeForce RTX 2050 - AMD Radeon 680M
ASUS TUF Gaming A15 FA506NF_FA506NF

The system was operating normally under light workload (writing code and web browsing)
when a sudden power-off–like reset occurs.

Observed Behavior
-----------------
- The system suddenly powered off instantly, equivalent to a hard power cut.
- No freeze, no graphical artifacts, no kernel panic, no thermal or power warnings
prior to the event.
- Battery level was ~37% and remained consistent after reboot.
- Hardware appears healthy (CPU, RAM, disk, GPU, Battery all function normally).

On the first power-on after the incident:
- The system behaves as if entering early firmware/UEFI phase.
- After ~20 seconds, it resets again before reaching the bootloader (GRUB).

On the second power-on:
- The system booted successfully into Linux.

Kernel Log Evidence
-------------------
During the successful boot after the incident, the kernel reports the previous reset
reason:

[ 0.610777] x86/amd: Previous system reset reason [0x00300800]:
ACPI power state transition occurred

This reset reason is provided by platform firmware / CPU reset status registers.
There is no kernel panic, watchdog, or triple fault.

ACPI / Firmware Indicators
--------------------------
The kernel log shows multiple ACPI BIOS errors and warnings during early boot.

Relevant dmesg excerpt:

❯ sudo dmesg | grep -iE "acpi|error|critical|exception"
[    0.249419] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.GPP2.WWAN], AE_NOT_FOUND
[    0.250073] ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.GPP6.WLAN._S0W], AE_ALREADY_EXISTS
[    0.253544] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[    0.512382] ACPI BIOS Error (bug): Could not resolve symbol [\_TZ.THRM._SCP.CTYP], AE_NOT_FOUND
[    0.610777] x86/amd: Previous system reset reason [0x00300800]: ACPI power state transition occurred

Full dmesg is available if needed.

Notes
-----
- This is not a kernel panic or userspace crash.
- The reset is firmware-reported as ACPI power state transition.
- The double-reboot behavior suggests firmware/EC/SMM state instability.
- Other users are reporting similar behavior on comparable AMD + ASUS platforms.

Let me know what additional raw data you want me to provide.

Last edited by Allen Eveland (2026-02-09 15:59:49)

seth · 2026-02-09 15:52:35

Please use [code][/code] tags, not "quote" tags. Edit your post in this regard.
Also please don't paraphrase, https://bbs.archlinux.org/viewtopic.php?id=57855 nor post your chat with some GPT, nobody want's to read that.
Also don't grep unless you know what you're grepping for and the only thing you can see in the current dmesg *after* a reboot are MCE errors

Hard reboots happen because of
* underpowered
* overheated
* bad cpu
* broken RAM
And as special case:
* windows, see the 3rd link below. Mandatory.
Disable it (it's NOT the BIOS setting!) and reboot windows and linux twice for voodo reasons.

Otherwise a more common problem is https://wiki.archlinux.org/title/Ryzen#Random_reboots (but with different symptoms)

Allen Eveland · 2026-02-09 16:04:30

I apologize for the inconvenience. Actually, I've never used forums like this before, and this was my first time, so I didn't know what to say.

Thank you very much for your feedback. I meant that the computer was perfectly normal at the time; it had only been turned on for less than 15 minutes, so there were no signs of overheating, and I was only using Linux, not dual boot.

I'd like to find more documentation related to this; if you have any, please let me know.

seth · 2026-02-09 16:12:59

Is this a ryzen CPU and did you visit https://wiki.archlinux.org/title/Ryzen#Random_reboots ?
https://docs.kernel.org/arch/x86/amd-debugging.html

"ACPI power state transition occurred" might be a red herring unless you tried to suspend or hibernate the system

Edit: no need to apologize, no harm was caused - we just nudge everyone into shape

Last edited by seth (2026-02-09 16:14:20)

Allen Eveland · 2026-02-09 16:26:42

Thank you very much, it seems I have also found complete documentation about this error and external information. Thanks a lot.

Last edited by Allen Eveland (2026-02-09 16:28:17)

Arch Linux

#1 2026-02-09 15:42:52

Sudden hard power-off (CF9 reset 0xE) on ASUS laptop - firmware

#2 2026-02-09 15:52:35

Re: Sudden hard power-off (CF9 reset 0xE) on ASUS laptop - firmware

#3 2026-02-09 16:04:30

Re: Sudden hard power-off (CF9 reset 0xE) on ASUS laptop - firmware

#4 2026-02-09 16:12:59

Re: Sudden hard power-off (CF9 reset 0xE) on ASUS laptop - firmware

#5 2026-02-09 16:26:42

Re: Sudden hard power-off (CF9 reset 0xE) on ASUS laptop - firmware

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