Re: coretemp.ko not auto-loaded on 3.11.x

From: Brian Gitonga Marete
Date: Mon Sep 30 2013 - 18:30:17 EST

On Tue, Oct 1, 2013 at 12:25 AM, Brian Gitonga Marete
<marete@xxxxxxxxxxx> wrote:
> Hello all,
> Some time ago, an enhancement was made to the kernel that caused
> coretemp.ko (as well as other cpu-specific drivers) to be auto-loaded.
> This has broken for me in 3.11.x. It works fine on 3.10.x.
> Please see the attached kernel config and let me know if I left out
> something notwithstanding doing a `sillentoldconfig' from my 3.10.x
> config, which does not exhibit the problem.

Some further information which upon some research, may be useful:

Kernel is 3.11.2 (But misbehavior first seen with 3.11.0)

$ cat /sys/devices/system/cpu/modalias

$ modinfo coretemp
filename: /lib/modules/3.11.2/kernel/drivers/hwmon/coretemp.ko
license: GPL
description: Intel Core temperature monitor
author: Rudolf Marek <r.marek@xxxxxxxxxxxx>
srcversion: 31B63A96FD9FD13CDDBDF32
alias: x86cpu:vendor:0000:family:*:model:*:feature:*00E7*
intree: Y
vermagic: 3.11.2 SMP mod_unload modversions
parm: tjmax:TjMax value in degrees Celsius (int)

I have UDEV 175 from Ubuntu 12.04.

The module alias seems to match that in cat
/sys/devices/system/cpu/modalias, so udev should be able to probe for
and load coretemp.ko, but that is not happening, which is strange to

I also note that microcode.ko, which is handled by the same mechanism
for auto-loading based on CPUID, is no longer auto-loaded in kernel

I have added Thomas Renninger and Greg Kroah-Hartman to the thread CC.


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