Comment 52 for bug 1649292

I finally have something new for you to test. This is for upstream, so I have a 4.10-rc6 build. Once it's fixed upstream we can backport the fix to xenial.

Please let me know whether or not this kernel fixes the permissions problem for you. Thanks!

http://people.canonical.com/~sforshee/lp1649292/linux-4.10-rc6/linux-image-4.10.0-rc6+_4.10.0-rc6+-7_amd64.deb