https://bugs.freedesktop.org/show_bug.cgi?id=91801
--- Comment #2 from Sylvain BERTRAND sylvain.bertrand@gmail.com --- bisected: commit 8cb9764fc88b41db11f251e8b2a0d006578b7eb4 Not a driver bug, linux core scheduler code seems screwed for my full dyntick systems :(((((