How can I install Samsung Allshare ( a windows app) on ubuntu 11.04?
I have tried unsuccessfully using Wine.
Alternatively, can you recommend other DNLA server options?
You cannot install AllShare on linux without wine but I would not recommend that at all.
Why dont you try using a better DLNA server like Serviio?
Its free, works great with my SamsungTv, has more file format support then AllShare and does the job on the background not bothering you.
I mentioned Serviio but there are a bunch of free DLNA servers out there. Do a Google search on DLNA servers and choose one. Start with Serviio tough, its recommended.