When using the volume buttons (+, -, mute) they are reacting weirdly. When I press the key for increasing the volume a bit, it'll go to the maximum automatically and when I decrease the volume, it'll automatically go to 0.
Volume control with the mouse works fine.
The buttons are working and get recognized:
Checked with keyboard system settings tool: they get recognized by the tool both from the laptop directly as well as from my USB keyboard.
Who can help?