Date: Sun, 14 Feb 2021 14:01:14 +0100 From: Leon Dietrich <doralitze@chaotikum.org> To: freebsd-stable@freebsd.org Subject: Microcode update prevents boot Message-ID: <a7a76dc2-dcf6-7d3a-00ac-a8474126a30d@chaotikum.org>
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Hi there, I already worked around the issue myself. I'm just writing this here in case someone else may have the same issue and is seeking an answer. I recently upgraded the intel cpu microcode update package. Since then the boot process hang at the stage where the other cpu cores where enabled (shortly after enabling acpi). In order to resolve the issue one has to boot in safe mode (not single user mode!) and comment (or remove) the lines enabling the cpu microcode update on boot in /boot/loader.conf. One can and should reboot then. After making these changes the system boots again and all cores are started and SMT works as well. One should note that one's not running the newer microcode (including some security-) fixes. Having microcode_update_enable=3D"YES" in /etc/rc.conf doesn't prevent booting and does not cause noticeable instability. For reference: Im running FreeBSD 12.1 on a supermicro embedded board with intel xeon E3-1585L v5 cpus. I hope someone will find this info useful. Leon Dietrich
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