Ubuntu 17.04 worked out of the box, but there was one annoyance: battery life. For some reason, the laptop was using 10 watts at idle. Thanks to some forum posts, I managed to tweak various kernel module options and got idle down to 4 watts. This drastically improved battery life. I then put together a script to enable power savings on startup. …

pm.sh

#!/bin/sh

# Disable the NMI watchdog
echo '0' > '/proc/sys/kernel/nmi_watchdog';

# Runtime power management for I2C devices
for i in /sys/bus/i2c/devices/*/device/power/control ; do
  echo auto > ${i}
done

# Runtime power-management for PCI devices
for i in /sys/bus/pci/devices/*/power/control ; do
  echo auto > ${i}
done

# Runtime power-management for USB devices
for i in /sys/bus/usb/devices/*/power/control ; do
  echo auto > ${i}
done

# Low power SATA
for i in /sys/class/scsi_host/*/link_power_management_policy ; do
  echo min_power > ${i}
done

# Disable Wake-on-LAN on ethernet port
ethtool -s wlan0 wol d;
ethtool -s eth0 wol d

#Enable Audio codec power management
echo '1' > '/sys/module/snd_hda_intel/parameters/power_save';

# Low power wireless
iw dev wlan0 set power_save on

Source: https://geoff.greer.fm/2017/07/16/thinkpad-x62/