Ive got mine working with Wine 1.7.55 on Linux Mint 17.2 Cinnamon
https://www.winehq.org/announce/1.7.55
I originally tried Ubuntu and couldnt troubleshoot the issues with getting p99 to work. I couldnt get it to work with PlayOnLinux either, but I also wasnt too familiar with how to setup the options. A friend told me he plays p99 on Linux Mint, so I switched to Mint, installed wine and EQ loaded right up without any problems. Mine is currently working on Mint without using PlayOnLinux