Re: boot slow down

[Antti Palosaari <crope@iki.fi>]

On 08/06/2012 11:37 AM, Andy Walls wrote:
> James <bjlockie@lockie.ca> wrote:
>
>> On 08/04/12 13:42, Andy Walls wrote:
>>> James <bjlockie@lockie.ca> wrote:
>>>
>>>> There's a big pause before the 'unable'
>>>>
>>>> [    2.243856] usb 4-1: Manufacturer: Logitech
>>>> [   62.739097] cx25840 6-0044: unable to open firmware
>>>> v4l-cx23885-avcore-01.fw
>>>>
>>>>
>>>> I have a cx23885
>>>> cx23885[0]: registered device video0 [v4l2]
>>>>
>>>> Is there any way to stop it from trying to load the firmware?
>>>> What is the firmware for, analog tv? Digital works fine and analog
>> is
>>>> useless to me.
>>>> I assume it is timing out there.
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>>>
>>> The firmware is for the analog broadcast audio standard (e.g. BTSC)
>> detection microcontroller.
>>>
>>> The A/V core of the CX23885/7/8 chips is for analog vidoe and audio
>> processing (broadcast, CVBS, SVideo, audio L/R in).
>>>
>>> The A/V core of the CX23885 provides the IR unit and the Video PLL
>> provides the timing for the IR unit.
>>>
>>> The A/V core of the CX23888 provides the Video PLL which is the
>> timing for the IR unit in the CX23888.
>>>
>>> Just grab the firmware and be done with it.  Don't waste time with
>> trying to make the cx23885 working properly but halfway.
>>>
>>> Regards,
>>> Andy
>>
>> I already have the firmware.
>> # ls -l /lib/firmware/v4l-cx23885-avcore-01.fw
>> -rw-r--r-- 1 root root 16382 Oct 15  2011
>> /lib/firmware/v4l-cx23885-avcore-01.fw
>>
>>
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>
>
> Hmm.  The firmware file size and location look right.
>
> The 60 second delay is the default kernel delay waiting for the userspace firmware loader to fetch th file amd provide it to the kernel via sysfs.
>
> That doesn't appear to be happening.  I know udev runs some script to accomplish that.  I'm away from my development system, so I can't investigate further.
>
> Regards,
> Andy

I suspect it could be the firmware download issue with udev. Recent udev 
versions doesn't allow firmware download during module init path as 
module init should not be blocked such long period.

I did quite much work for resolving that issue for the dvb usb by 
deferring device init in probe using work-queue. It is not good looking 
solution and Mauro is still trying to found out more general solution.

regards
Antti

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