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

[Simon Bolek]

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
> >
> >
> >
>
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