I have never had a problem mounting Bluray discs until today. I assume that an update broke something. I am posting in hardware because I felt is was the best choice.
I am still able to mount DVDs and I can mount the Bluray in question without issue while booted into Windows on the same machine. So I feel that the player and disc are not the problem.
If I try to mount using the command line, I get: “failed: Stale file handle”.
If I try to mount via the USB notification icon, I simply get a “mount failed” error.
I run openSUSE 13.1 with updates kept current, both from openSUSE and Packman. The player is an external LG Bluray burner connected via USB.
Seems like it is a bug in the current 3.17 Kernel which will be fixed with Kernel 3.18. In the meantime you could try to downgrade your Kernel to a pre 3.17 release.