Now start thinkfan, and check your fan levels. Modprobe: FATAL: Module thinkpad_acpi is in use If you encounter the following error, simply reboot your system to solve it.
Hwmon /sys/devices/virtual/thermal/thermal_zone0/hwmon1/temp1_input Hwmon /sys/devices/platform/coretemp.0/hwmon/hwmon4/temp2_input Hwmon /sys/devices/platform/coretemp.0/hwmon/hwmon4/temp1_input Hwmon /sys/devices/platform/coretemp.0/hwmon/hwmon4/temp3_input Hwmon /sys/devices/virtual/thermal/thermal_zone0/temp Now you may edit your configuration file.īelow is an example configuration file, based off of a T420 with NVIDIA Optimius: $ find /sys/devices -type f -name "temp*_input" If you have not modified any settings previously, it should show your level as "auto."įind your sensors' location by running and taking note of the output: Install the package thinkfan AUR, tp_smapi or tp_smapi-dkms AUR, read-edid, and i2c-tools. When using systemd, you may want to blacklist the tp_smapi module if your rvice fails, as new ThinkPads handle everything over acpi.ĬPU frequency scaling is fully supported with all of the available processor models with this laptop.Īs per this Thinkfan install guide for the T420, you can get the fans of your system running optimally. While these values should be permanent, they will be reset any time the battery is removed.ĮxecStart=/usr/bin/perl /usr/bin/tpacpi-bat -v -s SP 0 80ĮxecStart=/usr/bin/perl /usr/bin/tpacpi-bat -v -s ST 0 40Īlso, if you are dual booting with Windows, you can still control the battery charging thresholds with Lenovo's Power Manager which communicates directly to the battery controller. You may also want to write a simple rvice and enable it to set them at startup. The example values 40 and 80 given here represent the percentage of full battery capacity remaining.
usr/bin/perl /usr/bin/tpacpi-bat -v -s ST 0 40 usr/bin/perl /usr/bin/tpacpi-bat -v -s SP 0 80 Insert the acpi_call kernel module by running To control the battery charging thresholds, install the Perl script tpacpi-bat. Some features like setting the starting threshold for charging the battery do not yet work. For example, the hard drive protection mechanism HDAPS now works well. A number of features work since version 0.41.
Unfortunately, tp_smapi is only partially supported on the Thinkpad T420. See Fingerprint-gui for more information.ĪCPI is well supported here. The rest of the installation process can be followed with the Installation guide.Īll hardware works out of the box except the following:įingerprint reader works great with fprint and PAM (installation of fingerprint-gui recommended). There are no issues with installing Arch Linux with the latest Archiso. If you use Legacy Boot (traditional BIOS) or UEFI/Legacy Boot, choose an MBR partition table when partitioning the disk, because those modes are not compatible with GPT partition tables on the T420.
This laptop supports UEFI as well as the traditional BIOS.
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