On installing 12.1-BETA1 from USB memstick booting was stuck at auto loading of module if_bwn.ko each time. I have internal network device 'BCM4312 802.11b/g LP-PHY'. Same for upgraded from 11.3-REALEASE to 12.1-BETA3 system which failed to reboot at same point. Reboot which went fine after renaming of said module.
I have encountered the same issue on a device with a BCM4312 Wireless Adapter. The device was left for around 30 minutes and was still frozen. Multiple reboots results in the same outcome every time.
(In reply to Jacob from comment #2)
To add what I failed to mention - this is on release 12.2.
^Triage: seems to not be specific to 12.1.