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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