> > It is Ubuntu 20.04 derivative - fully updated, and the bios is also > fully updated. Both CPU and GPU are not overloaded in terms - they never > lock at 99% on all cores (my old machine can run on this load for many > hours - no overheating - max goes to about 90 Celsius no power supply > disconnect). But the new machine runs often at more than 100 Celsius (as > a peak temperature). Normally it is within 85-95 under load but peaks > above 100
You should distinguish the two "problems": - the CPU gets too hot: maybe it is not a problem, it is what it is. Notebook's thermal limits are always compromised, even on "gaming machines". You can clean filters, fans, re-apply thermal paste, but in the end the limits are still there. - the BIOS and/or kernel is not throttling the CPU as it should, and this is causing the hardware safety switches to shut down the computer. Some safety measures are not reset until you fully cut the power to the motherboard, so it's not strange that you need to disconnect the power brick to turn it on again. > What are the peak temperatures of your computers when under load? > Mine (Intel 4720HQ) goes up to 97-98°C before aggressively throttling back. You should check on AMD's site which are the warning and maximum temperatures for your particular CPU, and compare them with the data the system has. For example, using the command "sensors" for me shows: Package id 0: +55.0°C (high = +84.0°C, crit = +100.0°C) which is consistent with the thermal throttling in my CPU when the temperature is around 85-95°C. As I said before, unless the throttling safeguards are improperly configured or disabled, your CPU should never get hot enough to shut down under normal operation. My CPU is old and power inefficient by today's standards, and even then it's capable of working on passive cooling alone by automatically lowering the frequency to the minimum (accidentally tested once the fans got stuck). Things to check: - is frequency scaling working at all? - which is the frequency scaling governor? Some info: https://wiki.archlinux.org/index.php/CPU_frequency_scaling Regards, Guillermo ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
