https://bugs.freedesktop.org/show_bug.cgi?id=100443
--- Comment #22 from Andy Furniss adf.lists@gmail.com --- I've always seen
[powerplay] Can't find requested voltage id in vdd_dep_on_sclk table!
on R9 285 Tonga, but powerplay works OK and there are no other errors - so I assumed it's harmless when seen alone.