Operating system: Linux Mint with latest up dates
Graphics card: Nvidia GTX 750 Ti
Broken: 2.80-3b4054cb586f-linux-glibc217-x86_64.tar ( Loop Select Not Working )
When using Alt Select on even a basic cube mesh nothing is selected at all but the icons on bottom of screen are changing Ctrl Select is still working fine.
Exact steps for others to reproduce the error
Load default Cube, Enter edit mode, Subdivide cube, press Alt key and try to selecting any loop vertex loop nothing happens.