[yocto] Warning: unable to open an initial console

[Gerard van den Bosch]

Hello Ayoub,

The kernel is quite old 2.6.20 and this variable is not available in the
config.
On the internet I saw this is only introduced with kernel version 2.6.32.

Cheers,
Gerard

On Fri, May 26, 2017 at 10:20 PM, Ayoub Zaki <ayoub.zaki at embexus.com> wrote:

> Hi Gerard,
>
> did you try to set CONFIG_DEVTMPFS=y in your Kernel config ?
>
> Cheers
>
> On 26.05.2017 15:52, Gerard van den Bosch wrote:
>
> Hello Andrea,
>
> I have tried to add the line to my machine config:
> IMAGE_DEVICE_TABLES = "files/device_table-minimal.txt"
>
> But this didn't help, then I looked a bit further and also tried to set
> the following:
>
> USE_DEVFS="0"
> VIRTUAL_RUNTIME_dev_manager = "mdev"
>
> Unfortunately this doesn't seem to change anything.
>
> Cheers,
> Gerard
>
> On Fri, May 26, 2017 at 7:27 PM, Andrea Adami <andrea.adami at gmail.com>
> wrote:
>
>> On Fri, May 26, 2017 at 1:05 PM, Gerard van den Bosch
>> <gvandenbosch at gmail.com> wrote:
>> > Hello,
>> >
>> > I have build my vendor custom kernel 2.6.20 with yocto daisy.
>> > Daisy is used because seems to be last release supporting this old
>> kernel.
>> >
>> > I tried building core-image-minimal and core-image-base.
>> >
>> > The kernel boots and the rootfs is mounted but then I get:
>> >
>> > "Warning: unable to open an initial console."
>> >
>> >
>> > I found on the internet this is because "/dev/console" doesn't exists.
>> > The dev folder in my generated rootfs is empty.
>> >
>> > On internet found can do the following commands:
>> > "mknod -m 600 /dev/console c 5 1 "
>> > "mknod -m 666 /dev/null c 1 3"
>> >
>> > But if this is the problem how do I add this to my recipe?
>> > Or is there a proper way to populate this devices?
>> >
>> > Cheers,
>> > Gerard
>> >
>> > --
>> > _______________________________________________
>> > yocto mailing list
>> > yocto at yoctoproject.org
>> > https://lists.yoctoproject.org/listinfo/yocto
>> >
>>
>> Hello Gerard,
>>
>> if your old kernel lacks devtmpfs you need a "device table".
>> You need to set at least
>> IMAGE_DEVICE_TABLES = "files/device_table-minimal.txt"
>>
>> This is a default set in image.bbclass before and after daisy...dunno
>> what's happened with this release.
>>
>> Cheers
>> Andrea
>>
>
>
>
>
> --
>
> Ayoub Zaki
> ayoub.zaki at embexus.com
> Mobile: +49(0)176-62901545 <+49%20176%2062901545>https://embexus.com
>
>
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