Power management seems to be poor on a fresh install of most distros, but all you have to do is install tlp to dramatically improve battery life. On 16.04 all I

Power management seems to be poor on a fresh install of most distros, but all you have to do is install tlp to dramatically improve battery life. On 16.04 all I had to do was install it. I didn't have to configure anything (or even enable the service manually), and got dramatically better battery life than under Windows. When I installed 18.04 on my XPS 15 I had an issue with power consumption being way too high even with tlp installed (13W on idle), but I used powerstat to investigate and found that runtime power management was not being enabled for my discrete GPU. The tlp defaults must have changed at some point between 16.04 and 18.04. So I set RUNTIME_PM_DRIVER_BLACKLIST="" in /etc/default/tlp and now get <4.5W on idle, which gives about 12 hours of battery. I would prefer for it all to work perfectly without any configuration, of course, but then you have to accept ridiculously thin and overpriced hardware from Apple :)