Operating system: Linux-4.15.0-48-lowlatency-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GT 645M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 418.56
Broken: version: 2.80 (sub 60), branch: blender2.7, commit date: 2019-04-30 22:49, hash: rB480a09a92f7f
Short description of error
Ctrl, Shift, Alt keys not working or stuck at pressed state.
Exact steps for others to reproduce the error
For example, for the Shift key:
Select defaul cube, press Shift+D. Expected - object is dublicated; Result - nothing happens;
To get Shift stuck - Press D+Shift (in this particular order), release keys. Shift get stuck in pressed state as a result, now objects can be dublicated just by pressing D, view can be panned by holding only mouse middle button, any "Shift+[key]" shortcut executed just by pressing [key], etc..
To unstuck: Switch to any another program window and back to Blender.
Same for Ctrl and Alt keys.
Same for 2.79b.
Based on the default startup.
Shorcuts are working fine in any other program.