Every minute or so I get the "Your session has ended" popup in the admin. Entering my password just pops the message back up. If I reload the page I'm still logged in.
I'm running Craft in vagrant so maybe it's a permissions problem?
It could be related to this question since I had that exact problem but setting the permissions in vagrant fixed that particular problem.
I've tried the requireUserAgentAndIpForSession, overridePHPSessionLocation, and userSessionDuration config settings, but none of them seem to solve the popup.