Comment # 14 on bug 1200983 from Michael Hirmke

(In reply to Takashi Iwai from comment #13)
> (In reply to Michael Hirmke from comment #12)
> > (In reply to Stefan Dirsch from comment #10)
> > > Thanks for testing. Indeed this makes it a kernel issue. You could also test
> > > the mouse on the Linux console via 'evtest /dev/input/eventXX', but this is
> > > a bit complicated to figure out the right device. So I only wanted to
> > > mention keyboard here.
> > 
> > Keyboard and mouse both have problems one the console, too.
> > The keyboard vanishes after a few seconds and returns, as soon as a key is
> > pressed, but the first keypress is not shown. The mouse never works on the
> > console - no events are shown.
> 
> What do you mean "vanishes" here? It means that the /dev/input/event* device
> is gone?

no, there is no mouse pointer and the keyboard light is off.

> 
> The point to check here is whether the device file persists and can
> read/write from a user-space (no matter whether it's processed or not).  Or
> is the (USB?) audio device itself disappears and reappears automatically.

Because the keyboard also has problems, this isn't easy to debug.
What exactly would you like me to test?