Michael Bautin wrote:
The lockups I am experiencing are real hardware lockups, because I
debugged ring head tail position and it does not change. Is it possible
to detect hardware lockup and reset hardware automatically, by the way?
I've read that Longhorn display drivers for existing hardware are
capable of something like that.
Yes, this is possible. Catalyst driver does that since some time. As
you've noted, if the ring doesn't advance the chip has locked up. You
can then reset it, though you will lose pretty much all state (?). This
would actually be a nice thing to have. There once was a similar patch
floating around, though it wasn't actually for that problem, instead
intended to kill apps which never release the lock (and it just happens
that the lock is often held when the chip has locked up and the app is
waiting for buffers).
Roland
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