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Bug#684569: linux-image-3.5-trunk-686-pae: microcode module loaded on Celeron CPU



On Sat, 2012-08-11 at 12:24 +0200, Paul Menzel wrote:
> Package: src:linux
> Version: 3.5-1~experimental.1
> Severity: normal
> Control: user debian-eeepc-devel@lists.alioth.debian.org
> Control: usertags -1 701
> 
> 
> Dear Debian folks,
> 
> 
> testing Linux kernel 3.5-1~experimental.1 [1] from Debian experimental I
> noticed that the module `microcode` is loaded which has according to
> `/var/log/syslog` not been the case with Linux 3.2.y.
[...]
> So to summarize I think, this module should not be loaded automatically
> for this Celeron processor, which is not need for operation.

This really depends on what operations you want to do, and how buggy the
CPU microcode installed by the BIOS is.  If you care that much about it,
you can blacklist it.

> Commit 78ff123b [1]
> 
>         commit 78ff123b05fb15beb1ad670372eea0d299d0b8af
>         Author: Andi Kleen <ak@linux.intel.com>
>         Date:   Thu Jan 26 00:09:13 2012 +0100
> 
> is likely the one introducing this behavior.
> 
>         $ git describe 78ff123b05fb15beb1ad670372eea0d299d0b8af
>         v3.3-rc1-38-g78ff123

I think that should actually be backported to wheezy, as I meant to
apply all the CPU auto-loading patches.

Ben.

-- 
Ben Hutchings
Unix is many things to many people,
but it's never been everything to anybody.

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