I have had trouble using Blender 2.81 due to the way Elementary OS keyboard shortcuts interact with the software.
The Set key combo for Selecting multiple edgeloops is Shift + Alt + Click. This works in Windows 10, MacOSX, and other Linux Distros.
I have confirmed on Blender's stack exchange others are having this issue.
Is there a way to modify how the system-wide shortcuts interact with programs?