Bug 722785

Summary: No boot-time microcode update visible after microcode_ctl 1.17-15 update
Product: [Fedora] Fedora Reporter: Stan King <stanley.king>
Component: microcode_ctlAssignee: Anton Arapov <anton>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 15CC: antillon.maurizio, anton, jonathan, nobody
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
See Also: https://bugzilla.redhat.com/show_bug.cgi?id=690930
Fixed In Version: microcode_ctl-1.17-16.fc15 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-07-30 23:52:27 EDT Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Description Stan King 2011-07-17 16:25:22 EDT
Description of problem:

After Fedora 15 Update microcode_ctl-1.17-15.fc15, my Intel systems' boot messages no longer indicate a microcode update.

For example, on this machine, the relevant boot messages were:

microcode: CPU0 sig=0x6fd, pf=0x80, revision=0xa3
microcode: CPU1 sig=0x6fd, pf=0x80, revision=0xa3
microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
microcode: CPU0 updated to revision 0xa4, date = 2010-10-02
microcode: CPU1 updated to revision 0xa4, date = 2010-10-02

After the update to microcode_ctl-1.17-15.fc15, only the first three lines appear.  However, the last two lines will still appear if I run "microcode_ctl -u" as root.

This processor is an Intel Core 2 Duo T5250, but I think I can provide other examples if you'd like.

Version-Release number of selected component (if applicable):


How reproducible:

Perform a normal boot of the system.

Steps to Reproduce:
1. Boot system.
Actual results:

No confirmation of updated CPU microcode.

Expected results:

Boot messages, visible in dmesg output or in /var/log/messages, indicating that CPU microcode was updated.

Additional info:

Upon request, of course.
Comment 1 Fedora Update System 2011-07-21 07:08:55 EDT
microcode_ctl-1.17-16.fc15 has been submitted as an update for Fedora 15.
Comment 2 Anton Arapov 2011-07-21 07:09:45 EDT
See details in bug 690930
Comment 3 Fedora Update System 2011-07-22 22:08:28 EDT
Package microcode_ctl-1.17-16.fc15:
* should fix your issue,
* was pushed to the Fedora 15 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing microcode_ctl-1.17-16.fc15'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).
Comment 4 Stan King 2011-07-25 16:27:36 EDT
This change is working well for me on an Intel Atom N280 and the Core 2 Duo T5250 mentioned above, both of which required a microcode update.  It also works on a Pentium 4 "650", which did not need a microcode update.  Thanks for the good work.

On an AMD Athlon II X4 620, it got the usual "AMD microcode update via /dev/cpu/microcode not supported" message, strangely enough, 7 times for a 4-core processor.  I understand that this is expected behavior.
Comment 5 Fedora Update System 2011-07-30 23:52:22 EDT
microcode_ctl-1.17-16.fc15 has been pushed to the Fedora 15 stable repository.  If problems still persist, please make note of it in this bug report.