HD4550 DRI issues

Richard Kolkovich sarumont at sigil.org
Sat Sep 26 00:13:02 UTC 2009

On Fri, Sep 25, 2009 at 04:55:23PM -0500, Robert Noland wrote:
> So, things are all correct at this point... and not much happens between
> here and the userland print that show corrupted values.  Basically all
> that happens is an mmap to userspace and print the values from the
> userspace perspective...  You're not the first report that I have had of
> this. (It doesn't appear to be r600 related at all, IIRC prior reports
> were on like 9200's)  I think it is restricted to PCI/PCI-E radeons,
> though given where it appears to be happening I don't see any reason
> that it couldn't effect other cards as well.  I'm really not certain how
> to move forward debugging really, without being able to reproduce it and
> break out into gdb to try and inspect memory.  There is something
> "special" about your setup, since this seems to be a relatively rare
> issue.  The only other thing that I can think of to do, is to start
> adding a bunch of debugging into the mmap routines, but that is going to
> get really noisy.
> robert.

Awesome.  :-\

If you want to hook up gdb, I can create a shell account for you to do so.  

Aside from that, I'm not sure how to proceed.  If it's happened on cards as old as 9200s, I 
probably won't have much luck with any other radeon card with my current setup.  


Richard Kolkovich
sarumont at sigil.org
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