On Wed, Mar 16, 2011 at 21:49, Jose E. Roman <jroman@dsic.upv.es> wrote:

Yes, I am aware of this. I added a note to the PCPARMS manpage stating that this preconditioner should be used with flexible methods (fgmres, gcr).

Aha, I should have read it. Still seems like a common gotcha so defaulting to linear would be nice.