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

[nick]

Simon,
Your right is this probably an issue with your boot partition  config.
Regards Nick 

On 2015-01-09 04:20 AM, Simon Bolek wrote:
> Hi Nick, attached is my kernel .bbappend and .cfg files of linux kernel
> recipe of my own layer. In original meta layer nothing was changed.
> 
> However, I spent last night trying to resolve the problem and found out
> that standard core-sato-image was missing
> meta/recipes-core/initrdscripts
> I added that to the local.conf file and also added grub to it.
> I wonder how 'install' was possible without those scripts, well, never mind.
> After building .hddimg again i was able to boot and install the image from
> USB device to atom-pc. Installation seemed to work without problems BUT
> after removing the usb device, boot FAILED: *not bootable device* - I was
> crying out loud, belive me!, gave up and went directly to bed...
> 
> The same(built and generated at the same bitbake run) iso image is working
> in virtual box like a charm.
> There must be a difference/bug somewhere.
> Vbox is creating partitions on hda, atom-pc has sda. Should not be a
> problem, but still a difference.
> Could you help me on that? There are 3 Partitions on /dev/sda:
> /dev/sda1 - boot partition (no asterix in partition table visible, but no
> asterix on Vbox partition table as well)
> /dev/sda2 - rootfs
> /dev/sda3 - swap
> 
> However, I will open another thread for this.
> 
> thank you and best regards
> simon:-)
> 
> On Fri, Jan 9, 2015 at 3:17 AM, nick <xerofoify at gmail.com> wrote:
> 
>> 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
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>