https://bugzilla.kernel.org/show_bug.cgi?id=38082
--- Comment #8 from Lorenzo M. (lore...@masellis.eu) --- I sincerely object to closing this bug, for several reasons. First, ist' not a matter of fan active control (which I recognise should not be used): the current kernel implementation breaks automatic fan management by EC, which otherwise works with acpi=off. Moreover, it causes fan monitoring not to work at all. Second, Thinkpad ACPI driver is being actively maintained and is receiving patched for very related subjects, a this one from just a couple weeks ago introducing support on a very similar model: https://patchwork.kernel.org/project/platform-driver-x86/patch/20240816141228.134529-1-kont...@matthias-fetzer.de/ By the way this patch introduces support for FANG and FANW methods, which are also implemented in E555 DSDT (see attachment). So methods are recognised and used by the kernel, but the implementation fails on E555 (maybe because of model-specific arguments passed to the methods). If the patch is accepted in the mainline kernel, this would be the subject for a new bug report. The patched module is loaded correctly and the related hierarchies in proc and sysfs are populated, but trying to monitor or control the fan is ineffective or causes errors: # cat /proc/acpi/ibm/fan cat: /proc/acpi/ibm/fan: No such device or address # cat /sys/class/hwmon/hwmon5/name thinkpad # echo 1 > /sys/class/hwmon/hwmon5/pwm1_enable # cat /sys/class/hwmon/hwmon5/pwm1 109 # echo 255 > /sys/class/hwmon/hwmon5/pwm1 # cat /sys/class/hwmon/hwmon5/pwm1 109 # cat /sys/class/hwmon/hwmon5/fan1_input cat: /sys/class/hwmon/hwmon5/fan1_input: No such device or address -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug. You are watching someone on the CC list of the bug. _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
