Re: [next] Failing Odroid XU3 boot due to missing MMC device

Markus Reichl
2016-04-14T08:55:09Z

Am 14.04.2016 um 10:45 schrieb Russell King - ARM Linux:
> On Thu, Apr 14, 2016 at 10:31:12AM +0200, Markus Reichl wrote:
>> Hi Krzysztof,
>>
>> yes, observed this with linux-next from yesterday 13.
>>
>> I boot from eMMC.
>> Device numbering of eMMC and SD are exchanged now.
>>
>> I solved the boot problem by changing the rootdev in U-Boot env
>> from /dev/mmcblk0p2 to /dev/mmcblk1p2.
>>
>> Changed /etc/fdisk, too, to mount /dev/mmcblk1p1 to /boot.
>
> You really should mount by partition uuid - supplying something like:
>
> root=PARTUUID=f3ae567e-02
>
> on the kernel command line. This makes the mounting of rootfs
> independent of which device carries the filesystem.
>
> If you're not using an initramfs, the kernel prints the partuuid
> values if it doesn't find the rootfs. I don't know how to get the
> partuuids without going through that process, sorry.

lsblk --output PARTUUID

>