Arch Linux

Ryexa

Member

Registered: 2026-01-19

Posts: 2

Random crashes and hardware error logs on AMD A12 laptop

Hello,

I have been struggling with random crashes on my laptop and I am trying to figure out whether this is a hardware issue or something else. The system sometimes freezes, the screen glitches, or it simply reboots, and in certain cases the Caps Lock LED starts blinking, which I read could indicate a kernel panic. After checking the logs with journalctl -p err -b -1, I occasionally see hardware error messages like the ones below:

ene 14 12:39:14 archlinux kernel: [Hardware Error]: System Fatal error.
ene 14 12:39:14 archlinux kernel: [Hardware Error]: CPU:0 (15:65:1) MC4_STATUS[-|UE|-|-|PCC|-]: 0xb200001000020c0f
ene 14 12:39:14 archlinux kernel: [Hardware Error]: MC4 Error (node 0): Link-defined sync error packets detected on HT link.
ene 14 12:39:14 archlinux kernel: [Hardware Error]: cache level: L3/GEN, mem/io: GEN, mem-tx: GEN, part-proc: OBS (no timeout)
ene 14 12:39:14 archlinux kernel: [Hardware Error]: System Fatal error.
ene 14 12:39:14 archlinux kernel: [Hardware Error]: CPU:2 (15:65:1) MC1_STATUS[-|UE|MiscV|AddrV|PCC|-|-]: 0xbe00000000100153
ene 14 12:39:14 archlinux kernel: [Hardware Error]: Error Addr: 0x0000000000000006
ene 14 12:39:14 archlinux kernel: [Hardware Error]: MC1 Error: Microcode Patch Buffer.
ene 14 12:39:14 archlinux kernel: [Hardware Error]: cache level: L3/GEN, tx: INSN, mem-tx: IRD
ene 14 12:39:14 archlinux kernel: [Hardware Error]: System Fatal error.
ene 14 12:39:14 archlinux kernel: [Hardware Error]: CPU:2 (15:65:1) MC5_STATUS[-|UE|-|-|PCC|-|-]: 0xb200000000080600
ene 14 12:39:14 archlinux kernel: [Hardware Error]: MC5 Error: Hardware Assert.
ene 14 12:39:14 archlinux kernel: [Hardware Error]: internal: HWA

These errors do not always appear, but sometimes after a reboot they show up again. I ran memtest for about nine hours and it did not report any errors, and I also tried stress-ng for short periods of time (2-4min) without triggering any problems. At one point I thought switching to the LTS kernel solved the issue, but later I realized the same behavior occurs not only on Arch but also on other Linux distributions and even on Windows. I have disabled CPU frequency boost and checked the hard drive, but since the crashes also happen in live environments I don’t think the disk is the cause, but right now im not sure of nothing. The touchpad stopped working once, but came back after switching kernels, which initially made me suspect a kernel-related problem, though I am not convinced because the symptoms are present across different operating systems. However, it happened again at another moment and this time neither switching to kernel 6.18.3 nor the LTS version solved it... I eventually got frustrated, shut everything down, and when I powered the laptop back on later the touchpad was working again.

I use an AMD A12-9720P RADEON R7, 12 COMPUTE CORES 4C+8G, currently running kernel 6.12.65-1-lts. According to lscpu, the CPU MHz ranges between 1400 and 2700, with scaling disabled. The crashes are very arbitrary: sometimes the laptop can run for more than fifteen hours without issues (like now), while other times it crashes three or four times within a single hour. When it happens, the system either freezes, reboots, or shows strange screen artifacts, and occasionally the Caps Lock LED blinks as if it were a kernel panic.

Given these symptoms and the hardware error logs, I am wondering if this is definitely a hardware failure, or if there are other tests or solutions I should try before concluding that I need to replace the machine. Any guidance would be greatly appreciated.

Btw, I dont speak English natively, I translated this with ai... sorry for that.

Last edited by Ryexa (2026-01-19 20:24:27)