Rubymine hangs in Ubuntu 15.10

i upgraded from Ubuntu 15.04 to 15.10. after the upgradation rubymine hangs when i opened file popup (ctrl+shift+N) and enter a key to search for a file. I tried with dowgrading Rubymine version from 8.0.1 to RubyMine-7.0.4 also, the issue was not solved.

Please help me in solving this issue.

rubymine hanging.png

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