DisplayPort problems -> HowTo driver update?

[Others call me jean]

Hi

I really need help! I'm despairing )-:

First, with Arch Linux and GNOME my hardware configuration worked well.
Now I can't make runnable the same config with Qubes OS (XFCE and KDE).
It freezes with every change or suspend/resume.

My CPU is a Skylake one and therefore I maybe need newer drivers.

So my question: how can I update the Intel driver? (e.g. to mesa 13)

Thanks!

(See the first mail too:
https://groups.google.com/forum/#!msg/qubes-users/W-KAQN_k0Yw/9sNcgk4DAAAJ;context-place=msg/qubes-users/Sh7ckO2SpBk/A5-gQ3FE6pYJ)