I can confirm that the regression reported in comment #2 that I bisected to d55b4af909bc16f7982c2b8b8656f0898158627b is now fixed as of 80ad99da8bd213e12b925407f1c97a303aa8f87f (which pulled in 5838ae610ff36777b8fce6f353c2417980c1a1fa). Additionally I haven't been able to reproduce the case that this bug was originally opened for yet, (prior to 3.17 I could but it was always a bit finicky). Still, it's probably too early to say that its fixed for sure; I have a slightly different card than Martin's (a 10de:042f, NVIDIA Corporation G86 [Quadro NVS 290] (rev a1)).