Microcode revisions 0x2000065 and higher for Intel Skylake-X/W (family 6,

model 85, stepping 4; CPUID 0x50654) are disabled as they may cause system

hangs on reboot and the previous revision 0x2000064 is used instead.

Please refer to /usr/share/doc/microcode_ctl/caveats/06-55-04_readme

and /usr/share/doc/microcode_ctl/README.caveats for details.