vo=vdpau works with hwdec=yes, but there is now stutter in 60fps videos. It can be fixed by turning compositor off (it does not seem to matter which compositor is used, tested with xfwm4 and compton glx).
vo=vdpau 60fps stutter can also be fixed (mostly) with these additional mpv options:
" Given the recent work on glxvnd in Xorg, can we assume a native solution for Optimus is in the pipeline? With the dynamic power switching problem being already solved natively in the kernel for newer Optimus hardware, if glxvnd/glvnd can solve the bringing problem then we won't need bumblebee and primus anymore with new hardware and a recent software stack. We can keep them for the legacy driver series.
Seems there is an issue with new version of network-manager-applet 1.8.22-1.
Passwords for VPN connections don't seem to be stored when "Store the password only for this user" is selected. When entering the password in the configuration and pressing save, next time you open settings again, the password field is empty. Also it'll ask you for the password on connecting...
downgrading to 1.8.21dev+3+gb4c365b1 fixes the problem.
btw. when working in a single user environment one can choose "Store the password for all users". That still works.