Today I installed Ubuntu 20.04 on my Lenovo L380 Yoga laptop. The install went fine and all of the hardware seems to work until I shutdown or restart the unit. If the power cord is connected during boot, the laptop will not boot and won't even get far enough into booting to show the Lenovo splash screen. It just sits at a dark blank screen. No response to the keyboard. If I disconnect the power cord at this point, the booting will continue as normal and things seem fine.
If I boot the laptop without the power cord attached in the first place, it boots fine. I have also tried this with Fedora 32 and I got the same results. Prior to this day, I've only had the factory installed Windows 10 on this laptop. (I've successfully run Linux on other laptops too)