Messages in this thread | | | Subject | "Core temperature above threshold" on Fujitsu U757 with 2 core Kaby Lake (i7-7600U) | From | Christoph Anton Mitterer <> | Date | Sat, 28 Oct 2017 03:25:45 +0200 |
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Hey.
Perhaps someone can help me with this.
I got a brand new notebook from the university, a Fujitsu U757[0][1], with a 2 core Kaby Lake (i7-7600U) and 32GB RAM. It runs Debian unstable, that is as of now kernel 4.13.4.
Even at pretty simple tasks (just some VM running) and a bit more, the CPUs seem to overheat (>100°C). I brought the thing back to the university's vendor and they claimed that they couldn't reproduce this with the (Windows based) tests and it might be a OS issue (they did replace the heat paste at my request).
The kernel logs quite regularly give: Oct 28 03:15:19 heisenberg kernel: CPU2: Core temperature above threshold, cpu clock throttled (total events = 1207) Oct 28 03:15:19 heisenberg kernel: CPU0: Core temperature above threshold, cpu clock throttled (total events = 1207) Oct 28 03:15:19 heisenberg kernel: CPU1: Package temperature above threshold, cpu clock throttled (total events = 1394) Oct 28 03:15:19 heisenberg kernel: CPU3: Package temperature above threshold, cpu clock throttled (total events = 1394) Oct 28 03:15:19 heisenberg kernel: CPU0: Package temperature above threshold, cpu clock throttled (total events = 1394) Oct 28 03:15:19 heisenberg kernel: CPU2: Package temperature above threshold, cpu clock throttled (total events = 1394) Oct 28 03:15:19 heisenberg kernel: CPU0: Core temperature/speed normal Oct 28 03:15:19 heisenberg kernel: CPU2: Core temperature/speed normal Oct 28 03:15:19 heisenberg kernel: CPU3: Package temperature/speed normal Oct 28 03:15:19 heisenberg kernel: CPU1: Package temperature/speed normal Oct 28 03:15:19 heisenberg kernel: CPU2: Package temperature/speed normal Oct 28 03:15:19 heisenberg kernel: CPU0: Package temperature/speed normal
I guess every time it goes beyond 100° C.
Once so far I had a complete lockup of the machine (it still seemed to write data to the HDD, but I could only hard power cycle to get it usable again. Not sure if this is related to the temperature issue. See the attached kernel log.
At around Oct 15 22:46:39 there seems to be first a crash of the Wifi microcode a bit later, beginning at about Oct 16 01:27:16, there are numerous stack traces with "BUG: soft lockup - CPU".
Could this be some kernel issue? Especially the overheating... I mean obviously not in the sense that it's the kernels fault, but in the sense that is should speed it down earlier or so...?
Interestingly, when I run e.g. stress or stress-ng on all 4 logical CPUs... then sometimes I do get the overheating, sometimes not (in which case temperature stays above 90°C.. but always below 100°C (I assume).
Any help would be welcome, do not hesitate to ask if you need more data (keep me CCed).
Thanks, Chris.
[0] http://www.fujitsu.com/fts/products/computing/pc/notebooks/lifebook-u757/ [1] http://docs.ts.fujitsu.com/dl.aspx?id=addf5093-b73b-407b-ae78-90c5baf6456a[unhandled content-type:application/x-xz] | |