Could you go to this x86 support thread, open an issue, and post the requested information from the very first post? The log would be very interesting, as it probably shows what firmware is missing for the newer Sony.
I’m currently preparing/ testing a new kernel with corresponding firmware, so it is the right time to get this solved.
Edit
This is missing: iwlwifi-6000g2b-ucode-18.168.6.1.tgz (but probably in a newer version), no idea yet where to get it.
Still need a log though…