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CPU Fan starts to go on maximum after ending suspend to RAM
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I installed PureOS 10 byzantium (from USB-Install-Drive made with pureos-10~devel-gnome-live-20220102_amd64.iso via Etcher) on my Librem 15v3.

After the installation was finished and first update & upgrade runs were done, I noticed that the CPU Fan starts to run on maximum level after the Librem had been on "suspend to RAM", when a USB-Drive is plugged in. No difference if the Laptop was send to suspend with "Fn + Esc" or by closing the lid or after energy saving activated suspend.

I also tried different drives (HDD, SDD, USB-Sticks). The issue could be reproduced with all of them and disappeard after unplugging the drive.

Event Timeline

Flo created this task.Fri, Jan 14, 06:43
phi3nix added a subscriber: phi3nix.Mon, Jan 24, 17:30

Did you update coreboot and EC firmware? I am having this issue but just putting PureOS to sleep once again helps.

Flo added a comment.Tue, Jan 25, 06:44

I noticed the issue directly after upgrading from amber to byzantium. I did not update coreboot at that moment. I'm not sure about EC firmware. I think I can not install/update this on my Librem 15v3.

I can confirm, that putting PureOS to sleep once again helps. Sometimes I had to do it several times.

I now updated coreboot to 4.15-2 (waiting for -3) and because I had another issue with very slow boot I ran 'sudo update-initramfs -u -k all' and I edited the file '/etc/default/grub' file so that the string 'noresume' is now included in the GRUB_CMDLINE_LINUX_DEFAULT line.

Now my boot is fast again and I could not reproduce the fan issue anymore.
I'll observe it for some days and I will report.