[ltp] Re: T420 fan and Ubuntu 25.04

Good day! On Sat, Feb 07, 2026 at 02:08:05AM +0100, gregor herrmann wrote: Yes. % cat /etc/modprobe.d/thinkpad_acpi.conf options thinkpad_acpi fan_control=1 % sudo grep -i thinkpad /var/log/dmesg BIOS vendor: LENOVO; Ver: 83ET76WW (1.46 ); Product Version: ThinkPad T420 [ 5.299925] kernel: thinkpad_acpi: ThinkPad ACPI Extras v0.26 [ 5.300072] kernel: thinkpad_acpi: http://ibm-acpi.sf.net/ [ 5.300122] kernel: thinkpad_acpi: ThinkPad BIOS 83ET76WW (1.46 ), EC unknown [ 5.300169] kernel: thinkpad_acpi: Lenovo ThinkPad T420, model 4180AH9 [ 5.317030] kernel: thinkpad_acpi: radio switch found; radios are enabled [ 5.317139] kernel: thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver [ 5.317201] kernel: thinkpad_acpi: Disabling thinkpad-acpi brightness events by default... [ 5.354172] kernel: thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked [ 5.355133] kernel: thinkpad_acpi: Standard ACPI backlight interface available, not loading native one [ 5.426089] kernel: thinkpad_acpi: battery 1 registered (start 0, stop 100, behaviours: 0x7) [ 5.439070] kernel: ACPI: battery: new hook: ThinkPad Battery Extension [ 5.466048] kernel: input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input6 -- -- http://www.yurichev.com Here I acknowledge that emails I use(d) are indeed: https://yurichev.com/contact.html#list Expecting a reply from me? Maybe your email was marked as spam. Please resend it to dennis.yurichev at gmail.com and/or dennis at yurichev.(com|org|net) My emails are also sometimes stuck in spam folder, so please check it... Internet email is subject to wholesale government surveillance. My PGP keys: http://yurichev.com/pgp.html Current key is B34936C128544E50BBDB88F1BF015EC5556DC725 Created 2021-06-28, expires 2026-06-27 -- -- http://www.yurichev.com Here I acknowledge that emails I use(d) are indeed: https://yurichev.com/contact.html#list Expecting a reply from me? Maybe your email was marked as spam. Please resend it to dennis.yurichev at gmail.com and/or dennis at yurichev.(com|org|net) My emails are also sometimes stuck in spam folder, so please check it... Internet email is subject to wholesale government surveillance. My PGP keys: http://yurichev.com/pgp.html Current key is B34936C128544E50BBDB88F1BF015EC5556DC725 Created 2021-06-28, expires 2026-06-27