Heads up, PCSX2 1.6 is now out with a LOT of stuff fixed. Not sure how current the Linux build is, but I've been REALLY happy with the improvements to the Windows version. Many games that had severe rendering issues are now playable.
@edmaul69 I think I was getting some interference with the foil, kept getting slow copy speeds to the flash drive or copy errors, so the foil was removed and the issue was resolved.
I tried it on a 32-bit installation of ubuntu and I must say it runs okay. However I don't know if it is really Dolphin 5.0.
It says "Dolphin f94cd57".