Ignore:
Timestamp:
06/16/2020 12:20:30 AM (18 months ago)
Author:
Ken Moffat <ken@…>
Branches:
10.0, 10.1, 11.0, ken/refactor-virt, lazarus, qt5new, trunk, xry111/git-date, xry111/git-date-for-trunk, xry111/git-date-test
Children:
4e1b891
Parents:
cb704b48
Message:

Microcode - add a Caution for certain Intel machines.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@23286 af4574ff-66df-0310-9fd7-8a98e5e911e0

File:
1 edited

Legend:

Unmodified
Added
Removed
  • postlfs/config/firmware.xml

    rcb704b48 rfe2553a  
    381381<screen><userinput>cp -v /lib/firmware/intel-ucode/&lt;XX-YY-ZZ&gt; kernel/x86/microcode/GenuineIntel.bin</userinput></screen>
    382382
     383      <caution>
     384        <para>
     385          On some Skylake machines with hex Model Number '4e' (78 decimal) the upgrade to
     386          microcode version '0xdc' is reported to cause the machine to hang in early boot,
     387          and the fix is to revert to version 0xd6 which was shipped in the 20191115
     388          microcode release.
     389        </para>
     390
     391        <para>
     392          Doing that, while making the machine usable, will mean that the SRBDS
     393          mitigations are not present.
     394        </para>
     395
     396        <para>
     397          The Skylake machines with hex Model Number '5e' (94 decimal) use similar
     398          firmware versions, but boot correctly with the mitigation applied.
     399        </para>
     400      </caution>
     401
    383402      <para>
    384403        Now prepare the initrd:
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