I had trouble upgrading my linux Ubuntu 13.04 to the newly released 13.10 (the upgrade failed, but I installed OK from DVD).
LotRO runs fine on my chubby ASUS laptop with:
- 64-bit Ubuntu 13.10
- NVIDIA driver 319.60 (installed painlessly from the new additional drivers tool)
- wine 1.6
- NVIDIA GeForce GTX 660M
FWIW, I upgraded the other partition to Win 8.1, and it runs fine there too. I don't spend much time in Windows, though.