[yocto] Booting .hddimg from USB failed -> ramdisk not found /dev/ram0 - HELP!

[nick]

Simon,
Please send me your kernel bb recipes as there is probably an issue in
them.
Regards,
Nick

On 2015-01-08 03:58 PM, Simon Bolek wrote:
> NIck, thank you. what do you mean by that? I followed the instructions from
> here:
> http://www.yoctoproject.org/docs/1.7/kernel-dev/kernel-dev.html#changing-the-configuration
> is there something there I might be missing? Where is the part, 'linking
> your kernels to the core-image-sato build'  that you are talking about?
> 
> thank you and best regards
> simon:-)
> 
> On Thu, Jan 8, 2015 at 6:50 PM, nick <xerofoify at gmail.com> wrote:
> 
>> Simon,
>> Why are you not linking your kernels to the core-image-sato build.
>> This seems to be the issue.
>> Regards Nick
>>
>> On 2015-01-08 05:59 AM, Simon Bolek wrote:
>>> Thank you Nick. I will try that, but this is not the point. I am trying
>> to
>>> figure out why
>>> *bitbake core-image-sato *
>>> does not create /dev/ram nodes, although linux-yocto has them defiined in
>>> .config file.
>>>
>>> I also created:
>>> mylayer/recipes-kernel/linux/linux_yocto_3.4.bbapend
>>> mylayer/recipes-kernel/linux/linux_yocto_3.10.bbapend
>>> mylayer/recipes-kernel/linux/linux_yocto_3.14.bbapend
>>>
>>> with the following content:
>>>
>>> FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
>>> SRC_URI += "file://ramdisk.cfg"
>>>
>>> and
>>> mylayer/recipes-kernel/linux/files/ramdisk.cfg
>>>
>>> with content:
>>> CONFIG_BLK_DEV_RAM=y
>>> CONFIG_BLK_DEV_RAM_COUNT=16
>>> CONFIG_BLK_DEV_RAM_SIZE=4096
>>>
>>> and afterwards run the commands:
>>> bitbake linux-yocto -c cleansstate
>>> bitbake linux-yocto
>>> bitbake core-image-sato
>>>
>>> again. Same result, no /dev/ram nodes under rootfs.
>>>
>>> What am i doing wrong?
>>>
>>> thank you
>>> simon:-)
>>>
>>> On Thu, Jan 8, 2015 at 2:03 AM, nick <xerofoify at gmail.com> wrote:
>>>
>>>> Simon,
>>>> Can you boot this on standard computer with qemu.
>>>> Try that first and report back if that works.
>>>> Nick
>>>>
>>>> On 2015-01-07 04:59 PM, Simon Bolek wrote:
>>>>> Hello folks!
>>>>>
>>>>> I have the following problem/question.
>>>>> 1) I built a standard .hddimg core-image-sato genericx86 on ubuntu
>> 14.10
>>>>> 2) Afterwards, this .hddimg was deployed to USB device (USB-ZIP method)
>>>>> 3) Tried to boot Atom PC from the USB Device -> *ERROR: cound not found
>>>>> ramdisk*
>>>>>
>>>>> so initrd is trying to find /dev/ram0 which does not exist in the
>> image.
>>>> I
>>>>> checked rootfs and there is nothing under
>>>>>
>>>>
>> ../poky/build/tmp/work/genericx86-poky-linux/core-image-sato/1.0-r0/rootfs/dev
>>>>>
>>>>> I googled this up and there is a thread telling to check the .config
>> file
>>>>> for *CONFIG_BLK_DEV_RAM *settings*.*
>>>>> I have the following entries in:
>>>>>
>>>>
>> ../poky/build/tmp/work/genericx86-poky-linux/linux-yocto/3.10.35+gitAUTOINC+7df9ef8ee4_2ee37bfe73-r0/linux-genericx86-standard-build/.config
>>>>> ...
>>>>> CONFIG_BLK_DEV_RAM=y
>>>>> CONFIG_BLK_DEV_RAM_COUNT=16
>>>>> CONFIG_BLK_DEV_RAM_SIZE=4096
>>>>> ...
>>>>>
>>>>> I also *bitbake core-image-sato -c cleansstate* twice already.
>>>>> I also* bitbake core-image-sato -c menuconfig *once more and
>>>>> afterwards *bitbake
>>>>> linux-yocto* again.
>>>>> I also tried IRC channels, but no answer so far...
>>>>>
>>>>> Can anyone help me? How can i force bitbake to create /dev/ram0 under
>>>>> rootfs?
>>>>> Or maybe there is another trick to boot the image from USB?
>>>>>
>>>>> best regards
>>>>> simon:-)
>>>>>
>>>>> Viele Grüsse
>>>>> Simon Bolek
>>>>>
>>>>> mit freundlichem Gruss / best regards / pozdrawiam / atentamente
>>>>> Simon P. Bolek
>>>>> ------------------------------------------------------
>>>>> Dipl. Inf. Simon P. Bolek
>>>>> SAP Consultant
>>>>> Business Mobile and IVI Solutions
>>>>> mailto: simon.bolek at arcom-ivi.de
>>>>> http://www.arcom-ivi.de/
>>>>> XING: https://www.xing.com/profile/SimonP_Bolek
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
>