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

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

[Simon Bolek]

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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@arcom-ivi.de
http://www.arcom-ivi.de/
XING: https://www.xing.com/profile/SimonP_Bolek

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Re: Booting .hddimg from USB failed -> ramdisk not found /dev/ram0 - HELP!

[Simon Bolek]

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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@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@arcom-ivi.de
> > http://www.arcom-ivi.de/
> > XING: https://www.xing.com/profile/SimonP_Bolek
> >
> >
> >
>

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Re: Booting .hddimg from USB failed -> ramdisk not found /dev/ram0 - HELP!

[nick]

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@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@arcom-ivi.de
>>> http://www.arcom-ivi.de/
>>> XING: https://www.xing.com/profile/SimonP_Bolek
>>>
>>>
>>>
>>
> 

Re: Booting .hddimg from USB failed -> ramdisk not found /dev/ram0 - HELP!

[Simon Bolek]

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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@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@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@arcom-ivi.de
> >>> http://www.arcom-ivi.de/
> >>> XING: https://www.xing.com/profile/SimonP_Bolek
> >>>
> >>>
> >>>
> >>
> >
>

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Re: 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@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@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@arcom-ivi.de
>>>>> http://www.arcom-ivi.de/
>>>>> XING: https://www.xing.com/profile/SimonP_Bolek
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
> 

Re: Booting .hddimg from USB failed -> ramdisk not found /dev/ram0 - HELP!

[Simon Bolek]

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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@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@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@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@arcom-ivi.de
> >>>>> http://www.arcom-ivi.de/
> >>>>> XING: https://www.xing.com/profile/SimonP_Bolek
> >>>>>
> >>>>>
> >>>>>
> >>>>
> >>>
> >>
> >
>

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# Example use of configuration fragments for busybox, which uses the same
# mechanism as the linux-yocto kernel recipe.
#
# The entries here will override any entries in the base busybox recipe
#
# More details can be found in the Kernel Dev Manual
# http://www.yoctoproject.org/docs/current/kernel-dev/kernel-dev.html#changing-the-configuration

FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
SRC_URI += "file://ramdisk.cfg"

[-- Attachment #3: ramdisk.cfg --]
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CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=4096

Re: 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@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@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@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@arcom-ivi.de
>>>>>>> http://www.arcom-ivi.de/
>>>>>>> XING: https://www.xing.com/profile/SimonP_Bolek
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
> 

Re: Booting .hddimg from USB failed -> ramdisk not found /dev/ram0 - HELP!

[ChenQi]

[-- Attachment #1: Type: text/plain, Size: 1906 bytes --]

How about adding in local.conf the following line? Does it work for you?
USE_DEVFS = "0"

Regards,
Chen Qi

On 01/08/2015 05:59 AM, 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@arcom-ivi.de <mailto:simon.bolek@arcom-ivi.de>
> http://www.arcom-ivi.de/
> XING: https://www.xing.com/profile/SimonP_Bolek
>
>


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