Ubuntu 16.04 and Brocade 1010/1020/1007/1741 CNA: task bfad_worker:952 blocked (incompatible firmware)

After upgrading Ubuntu LTS 14.04 to 16.04 system stopped booting and proposed entering maintenance shell to solve a problem. There are two problem indicators in logs: [  721.242651] INFO: task bfad_worker:952 blocked for more than 120 seconds. [  721.272889]       Not tainted 4.4.0-31-generic #50-Ubuntu [  721.302231] “echo 0 > /proc/sys/kernel/hung_task_timeout_secs” disables this message. [  721.332218] bfad_worker … Read moreUbuntu 16.04 and Brocade 1010/1020/1007/1741 CNA: task bfad_worker:952 blocked (incompatible firmware)