Operating system: Linux Mint 19
Graphics card: GT 630
2.80 (sub 39), branch: blender2.7, commit date: 2018-12-25 16:36, hash: 60b930af3e73
I can't rotate the bones in pose mode except for using the value sliders in the bone tab. Neither widgets nor keyboard shortcuts ("r", "s") work. Even the deault plane suffers from this behaviour. I searched for 2 days for the reason, but without result.