From: torvalds@klaava.Helsinki.FI (Linus Torvalds) Subject: Re: Freeze up on X Date: 22 Jan 1993 12:52:47 GMT
In article <1993Jan21.181502.23485@miles.com> dennisf@miles.com (Dennis Flaherty) writes:
>
>Here's another clue. Try this: when your system freezes, running X, try
>MOVING THE MOUSE. It's weird!! But moving the mouse actually makes the
>system run! Stop moving the mouse, and the system freezes again. And
>this only happens with 0.99.3, not 0.99.2.
Get pl4, and it should be gone. There was a bug in the handling of
uninitialized interrupts in pl3, where they could result in either the
wrong interrupt mask being loaded leading to interrupt lock-out or (in
some cases) bit corruption at the user level. The symptoms are exactly
as you describe: a good interrupt that didn't happen to be locked out
will correct the interrupt mask, and the system goes on (it can be
moving the mouse, but it might also be a keyboard event etc).
Linus