On 17th of June 2005, I posted at 20.22 a problem regarding ACPI, which I didn't obtain battery status and info on Acer TM2301LM notebook (I use Fedora Core 4). I've found out (maybe just me didn't know it! :) ) that Acer Travelmate notebooks have Smart Battery that isn't supported by linux. After a deep researches, I've found a driver for Smart Batteries. Here the solution: http://ubuntuforums.org/archive/index.php/t-5949.html The driver is http://shayol.bartol.udel.edu/~rhdt/download/acpi_sbs-20050120.tar.gz . My steps were: 1) Applying patch acpi-ec-2.6.10.diff located into acpi_sbs-20050120.tar.gz package as well described in README file (I used 2.6.12 vanilla kernel) 2) Compiling kernel WITHOUT BATTERY and AC support; 3) Compiling driver and install modules After reboot with new kernel, I loaded SBS (Smart Battery System) modules with modprobe i2c-acpi-ec and modprobe acpi-sbs Then, under /proc/acpi/battery I can find BAT0 directory, with info and state files. The best feature of this driver is /proc/acpi/sbs/SB0 directory, which contains info and state files with extended information. Here an output: [root@acer-tm2301lm SB0]# cat state present: yes charging state: charging current: 1045 mA average current 1061 mA voltage: 16754 mV temperature: 35.1 C relative charge: 86% absolute charge: 68% remaining capacity: 1503 mAh run time to empty: n/a average time to empty: n/a average time to full: 1h 42m [root@acer-tm2301lm SB0]# [root@acer-tm2301lm SB0]# cat info present: yes design voltage: 14800 mV design capacity: 2200 mAh full charge capacity: 1745 mAh cycle count: 99 charge reporting error: 1% SB specification: v1.1 (without PEC) manufacturer name: SANYO manufacture date: 2004- 9-27 serial number: 32462 device name: 05ZL device chemistry: LION [root@acer-tm2301lm SB0]# And output of traditional /proc/acpi/battery/BT0 files: [root@acer-tm2301lm BAT0]# cat state present: yes capacity state: ok charging state: charged present rate: 0 mA remaining capacity: 1472 mAh present voltage: 16182 mV [root@acer-tm2301lm BAT0]# [root@acer-tm2301lm BAT0]# cat info present: yes design capacity: 2200 mAh last full capacity: 1745 mAh battery technology: rechargeable design voltage: 14800 mV model number: 05ZL serial number: 32462 battery type: LION OEM info: SANYO [root@acer-tm2301lm BAT0]# So... I hope can help many people with Acer notebook, and thanks a lot to Rich Townsend and Bruno Ducrot. Forgive me for my bad english... I'm italian! Piero
