Hi everybody, I've just bought a thinkpad T420s and I love it. The only issue I have at the moment is with the fan control and the thermal management. In particular I have no /proc/acpi/imb/thermal, what I see is only [root@alessandro-thinky alessandro]# ls /proc/acpi/ibm/ beep bluetooth cmos driver fan hotkey led light video volume Other info from dmesg is: [root@alessandro-thinky alessandro]# dmesg | grep think thinkpad_acpi: ThinkPad BIOS 8CET28WW (1.05 ), EC unknown thinkpad_acpi: Lenovo ThinkPad T420s, model 417032U thinkpad_acpi: detected a 8-level brightness capable ThinkPad thinkpad_acpi: radio switch found; radios are enabled thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked Registered led device: tpacpi::thinklight Registered led device: tpacpi::thinkvantage thinkpad_acpi: Standard ACPI backlight interface available, not loading native one. thinkpad_acpi: Console audio control enabled, mode: monitor (read only) input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input11 I am also seeing rather high fan speeds. If the laptop is left idle the fan spins continuously (at low speed, but it still spins, even if the laptop is really cool). The fan starts spinning faster upon intensive tasks, as expected, however when the task finishes (e.g. compiling kernel finishes), it takes ages before the fan returs to spin slower. From /proc/acpi/ibm/fan the average spinning speed is around 3000 RPM, moving to 4000 RPM with intensive tasks. Nothing changes if I enable fan_control=1. Furthermore, I have noticed that only level 0 (off), level 4 and level 7 change the spinning speed of the fan. Level 2 and 3, for example, seem to be the same. If it helps I'm on archlinux, with stock 2.6.38.2. Is this expected? Should I provide more information and if yes how? Thanks very much, Alessandro ------------------------------------------------------------------------------ Fulfilling the Lean Software Promise Lean software platforms are now widely adopted and the benefits have been demonstrated beyond question. Learn why your peers are replacing JEE containers with lightweight application servers - and what you can gain from the move. http://p.sf.net/sfu/vmware-sfemails _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
