Applications in Ubuntu, such as Chromium or the GNOME Terminal, are not responsive to mouse wheel scroll events when moving the mouse cursor at the same time. I am running Ubuntu 18.04.6 LTS as guest OS using VirtualBox 6.1 with a Windows 10 host.
I am facing the exact same problem, as described in this question. I have tried to apply its accepted solution but it is not working: When running xev | grep -e "ButtonPress" -e "ButtonRelease", I can see that scrolling events are indeed recorded while moving the mouse cursor.
I am also getting the exact same output with xinput:
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ VirtualBox mouse integration id=9 [slave pointer (2)]
⎜ ↳ VirtualBox USB Tablet id=10 [slave pointer (2)]
⎜ ↳ ImExPS/2 Generic Explorer Mouse id=12 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Sleep Button id=7 [slave keyboard (3)]
↳ Video Bus id=8 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=11 [slave keyboard (3)]
However, while disabling VirtualBox mouse integration with xinput disable 9, as suggested by the accepted solution, does make my applications more responsive to mouse wheel scroll events, it also has the undesirable side effect of disabling mouse pointer movement altogether (clicking still works though).
