Re: HEADS UP: graphics driver fixes

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Sat, Feb 28, 2015 at 06:24:58AM +0000, Taylor R Campbell wrote:
> tl;dr: If DRM/KMS has been flaky for you, please try again in HEAD!
> 
> 
> I recently found a bit of spare time to look for bugs I'd left in
> DRM/KMS which have left a lot of systems kinda-sorta working but not
> acceptably.
> 
> In so doing, I found several classes of bugs related to timeouts --
> about two dozen different bugs altogether, in different timed waits,
> including detecting displays, waiting for rendering commands to
> complete, and waiting for vertical blanks.  This affects all DRM
> drivers (at the moment, just Intel and Radeon).
> 
> I've reviewed all these timed waits, and I don't see any more of these
> bugs.  Obviously this code could use more eyeballs!  (Grep for
> `DRM_.*WAIT.*_UNTIL' if you'd like to lend yours.)  But if you've been
> having trouble with blank screens or flaky rendering or frequent hangs
> -- I can't promise anything, but please try again with a kernel from
> HEAD and let me know how it goes.

I'm sorry to say, it doesn't help on i386 with a i965GM. I still see
graphics (mainly font) corruptions with stellarium, and end up with a
dark screen with opencpn.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--