Comment # 15 on bug 104597 from Michel Dänzer

(In reply to Luke A. Guest from comment #14)
> It's been pointed out it's not Obs as TyMiles2012 moved back from the Oibaf
> PPA on Ubuntu 17.10.1 back to standard drivers and it no longer affects him.

That doesn't mean it's a Mesa bug, just that the OBS issue was triggered by a
change in Mesa's behaviour (it now exposes 10-bit-per-component colour
configs).