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# A good source of information about how to fix the issues still
# standing with kernel 4.6.11 is the following wiki page:
# https://wiki.archlinux.org/index.php/Lenovo_ThinkPad_X1_Carbon_(Gen_6). The
# TrackPoint and TouchPad issues there seem to have been fixed already.
{ config, pkgs, ... }:
{
imports = [
../.
];
# Give TLP service more control over battery
boot = {
extraModulePackages = with config.boot.kernelPackages; [
acpi_call
];
kernelModules = [
"acpi_call"
];
};
# See https://linrunner.de/en/tlp/docs/tlp-faq.html#battery
services.tlp.extraConfig = ''
START_CHARGE_THRESH_BAT0=75
STOP_CHARGE_THRESH_BAT0=80
CPU_SCALING_GOVERNOR_ON_BAT=powersave
ENERGY_PERF_POLICY_ON_BAT=powersave
'';
# Temporary fix for cpu throttling issues visible in the kernel log
# (journalctl -k) by setting the same temperature limits used by
# Window$
# See https://wiki.archlinux.org/index.php/Lenovo_ThinkPad_X1_Carbon_(Gen_6)#Power_management.2FThrottling_issues
systemd.services.cpu-throttling = {
enable = true;
description = "Sets the offset to 3 °C, so the new trip point is 97 °C";
documentation = [
"https://wiki.archlinux.org/index.php/Lenovo_ThinkPad_X1_Carbon_(Gen_6)#Power_management.2FThrottling_issues"
];
path = [ pkgs.msr-tools ];
script = "wrmsr -a 0x1a2 0x3000000";
serviceConfig = {
Type = "oneshot";
};
wantedBy = [
"timers.target"
];
};
systemd.timers.cpu-throttling = {
enable = true;
description = "Set cpu heating limit to 97 °C";
documentation = [
"https://wiki.archlinux.org/index.php/Lenovo_ThinkPad_X1_Carbon_(Gen_6)#Power_management.2FThrottling_issues"
];
timerConfig = {
OnActiveSec = 60;
OnUnitActiveSec = 60;
Unit = "cpu-throttling.service";
};
wantedBy = [
"timers.target"
];
};
# Enable S3 suspend state: you have to manually follow the
# instructions shown here: https://delta-xi.net/#056 in order to
# produce the ACPI patched table. Put the CPIO archive in /boot and
# then enable the following lines
# boot.kernelParams = [
# "mem_sleep_default=deep"
# ];
# boot.initrd.prepend = [
# "/boot/acpi_override"
# ];
}
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