FreeBSD:
The joy of unreproducible bugs. I've had a few problem reports about hangs with the DRI, particularly with Radeons, on FreeBSD-stable. I thought I had a patch to fix it, but when I put a radeon in my testbox I couldn't reproduce the problem on -stable. A user on IRC just asked me about the same problem, and when I gave him the patch it fixed it. Now it's off to the release engineers so it can make it in for 4.9-RELEASE, but I'm frustrated I didn't get this fixed a month or so ago when I first got that patch and had these problem reports.