Re: load kernel module at startup

[Gerard van den Bosch <gerard@de-haardt.com>]

On 04/22/2011 12:02 AM, Darren Hart wrote:
>
> On 04/21/2011 02:23 AM, Gerard van den Bosch wrote:
>> On 04/21/2011 08:27 AM, Martin Jansa wrote:
>>> On Wed, Apr 20, 2011 at 08:49:35AM -0700, Darren Hart wrote:
>>>> On 04/20/2011 08:31 AM, Martin Jansa wrote:
>>>>> On Wed, Apr 20, 2011 at 08:25:38AM -0700, Darren Hart wrote:
>>>>>> On 04/11/2011 02:38 AM, Gerard van den Bosch wrote:
>>>>>>> Hello,
>>>>>>>
>>>>>>> I would like to modprobe my wireless driver kernel module
>>>>>>> at startup automatically.
>>>>>>>
>>>>>>> This works when I generate a rootfs and then boot up the
>>>>>>> first time so the modules file gets generated and then I
>>>>>>> can manually add the kernel module in that file and then
>>>>>>> reboot.
>>>>>>>
>>>>>>> When I look in the manpage of update-modules it states that
>>>>>>> a config file should be added in /etc/modutils but that
>>>>>>> directory is not in my rootfs.
>>>>>>>
>>>>>>> So I was wondering what I have to do to get /etc/modutils
>>>>>>> directory or an other way to get the kernel module loaded
>>>>>>> at startup.
>>>>>>>
>>>>>>> I am using the Poky 4.0 Laverne release.
>>>>>> I believe you can just add the name of the module to:
>>>>>>
>>>>>> /etc/modules
>>>>>>
>>>>>> Can you try that?
>>>>> module_autoload_module_name to do that, is not supported in
>>>>> Poky?
>>>> I am not familiar with this technique.
>>> I've checked Poky 5.0 and according to git log it was there from
>>> the beginning, so also in Poky 4.0. And also it's inherited by
>>> linux-yocto(-stable).
>>>
>>> if you read classes/kernel.bbclass you'll notice ie:
>>> module_autoload_ipv6 = "ipv6"
>>>
>>> which adds postinst to kernel-module-ipv6 package to "modprobe
>>> ipv6" and also creates /etc/modutils/ipv6 file with "ipv6" in it to
>>> autoload ipv6 module after reboot.
>>>
>> Added the following line to class/kernel.bbclass:
>> module_autoload_libertas-sdio = "libertas-sdio" After that I
>> rebuilded the kernel and generated the image but didn't get the
>> modutils file and it didn't autoload either.
> I was hoping to get to this today and got derailed on something else.
> Would you please open a bug that we can use to track this. I'll get to
> it as soon as I can.
>
> http://bugzilla.yoctoproject.org/
>
> Thanks,
>
> Darren
>
Ok, I have opened the bug, it can be found here: http://bugzilla.pokylinux.org/show_bug.cgi?id=1002

Regards,
Gerard

>> Also tried adding the line inside my kernel recipe after "inherit
>> kernel" but that also didn't work.
>>
>>> similar module_conf_bluez = "alias net-pf-31 bluez" creates
>>> /etc/modprobe.d/bluez.conf (or /etc/modutils/bluez.conf for 2.4
>>> kernel) with "alias net-pf-31 bluez"
>>>
>>> and those files are added to kernel-module-something FILES, so
>>> removing module removes autoload and config with it properly.
>>>
>>> Regards,
>> This part I don't understand, how can I figure out what to alias?
>> With some googling I came across some list where it's major number
>> related, but there is no difference between /proc/devices when I have
>> the module loaded or not.
>>
>> Regards, Gerard
>>
>>