Question SYS-2028TP-HC0R BIOS 2.0 X2 Xeon E5-2660 v4 VMWare ESXi 5.5 (update 3) Type: Failed to ack TLB invalidate Example Error: PCPU 1 locked up. Failed to ack TLB invalidate Answer BIOS needs to be updated to 2.0a or newer as the newer microcode from Intel has a fix for this issue Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) F F Y 7 FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 23729 N/A 08/18/16     Print Answer