https://bugzilla.kernel.org/show_bug.cgi?id=214205
Marc Nijdam (m...@nijdam.de) changed:
What |Removed |Added
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CC| |m...@nijdam.de
--- Comment #4 from Marc Nijdam (m...@nijdam.de) ---
In the recent Thinkpad Carbon X1 4th firmware update notes (Version 1.52, dated
2022/01/27) it states:
...
[Problem fixes]
- Fixed an issue where fan might rotated with max speed due to not reading CPU
temperature correctly.
...
(Reference: https://download.lenovo.com/pccbbs/mobiles/n1fur45w.txt)
I can confirm that after updating from 1.48 to 1.52 the fan does not rotate a
single time anymore with max speed after resume.
Kernel: 5.13.0-28-generic, (Ubuntu 20.04.1)
To update I used the fwupdmgr command:
Make sure your model matches the exact model (For Thinkpad Carbon X1 4th this
is: 20FB and 20FC)
Download and extract n1ful45w.zip from this page:
https://pcsupport.lenovo.com/ie/en/products/Laptops-and-netbooks/ThinkPad-X-Series-laptops/ThinkPad-X1-Carbon-Type-20FB-20FC/downloads/DS111756
Connect a power cord first. To update I used the method with fwupdmgr and using
cab files from the shell:
fwupdmgr install N1FET78W.cab
reboot
Wait patiently until the bios is updated and your system is ready again. Then:
fwupdmgr install N1FHT36W.cab
reboot
Wait patiently until the ECP (Embedded Controller Program) is updated. You are
done.
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