DRI_PRIME=1 LIBGL_DEBUG=verbose glxinfo >/dev/null:
libGL: screen 0 does not appear to be DRI3 capable
libGL: pci id for fd 4: 1002:6604, driver radeonsi
libGL: OpenDriver: trying /usr/lib/x86_64-linux-gnu/dri/tls/radeonsi_dri.so
libGL: OpenDriver: trying /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
libGL: Can't open configuration file /home/darek/.drirc: No such file or
directory.
libGL: Can't open configuration file /home/darek/.drirc: No such file or
directory.

LIBGL_DEBUG=verbose glxinfo >/dev/null:
libGL: screen 0 does not appear to be DRI3 capable
libGL: pci id for fd 4: 8086:1616, driver i965
libGL: OpenDriver: trying /usr/lib/x86_64-linux-gnu/dri/tls/i965_dri.so
libGL: OpenDriver: trying /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
libGL: Can't open configuration file /home/darek/.drirc: No such file or
directory.
libGL: Using DRI2 for screen 0
libGL: Can't open configuration file /home/darek/.drirc: No such file or
directory.
libGL: Can't open configuration file /home/darek/.drirc: No such file or
directory.
libGL: Can't open configuration file /home/darek/.drirc: No such file or
directory.

It seems that I'm still using DRI2, how can I change that, am I missing some
libraries?

I am also using git version of mesa drivers, could closing fullscreen freezing
stop after recent updates? I couldn't reproduce freezing (4) and hdmi issues
while pressing fn button to change display (5) for last few days.