On 11/18/25 2:04 AM, Mike Larkin wrote:
IIRC when I looked at it it just read an EC register and did some biasing, so,
no, nothing special.
FWIW Linux also struggles with that broken ACPI:
[ 6.927809] ACPI: \_TZ_.TZ10: _PSL evaluation failure
[ 6.928103] thermal LNXTHERM:00: registered as thermal_zone0
[ 6.928105] ACPI: thermal: Thermal Zone [TZ10] (17 C)
[ 6.928204] ACPI: \_TZ_.UAD0: _PSL evaluation failure
[ 6.928283] thermal LNXTHERM:01: registered as thermal_zone1
[ 6.928285] ACPI: thermal: Thermal Zone [UAD0] (17 C)
from sensors:
acpitz-acpi-0
Adapter: ACPI interface
temp1: +16.8°C
temp2: +16.8°C
(and those numbers are below ambient temperature and don't change under
load)
Changing the "smart fan" (note: irony) settings in the BIOS seems to
have no effect.
However, Linux keeps the CPU fan spinning for some reason, and thus
avoids the emergency hardware shutdowns. It also avoids the "machine
does not turn-off" bug that has been introduced with the BIOS update.
Sébastien
