Repeater keys stuck forever, perhaps requiring host reset

[Raf Schietekat]

On host Ubuntu "Lucid Lynx" 10.04.1 LTS, VirtualBox 3.2.8 r64453, and the same Ubuntu version for a client (considering going full-time virtual Linux on a new system), pressing the physical sound control key until it repeats during full-screen video playback on the client never ends (sound volume control window keeps flickering). With the client displayed full-screen, and the video also full-screen, the mouse pointer was still visible and reactive, but nothing else I tried worked: home-f, positioning the pointer over the controls at the bottom (should shift up, but didn't), waiting overnight (problem persisted for several hours), ... Maybe I could have tried CTRL-ALT-F1 or something to get a text terminal (no access to external login at the time), or CTRL-ALT-BACK, I don't know if that would have worked, but instead I ended up having to reset the physical machine (not pretty). I don't really want to test this for reproducibility or to find the exact circumstances.

A milder form is when scrolling up or down on a web browser page or so: releasing the arrow key doesn't stop the scrolling, but at least this generally seems to end after the end of the page is reached, and then things return to normal.