[yocto] Not booting on BeagleBoard xM 0x2

[Andrea Galbusera]

Hi Tomas,

On Wed, Apr 4, 2012 at 12:14 PM, Tomas Frydrych
<tf+lists.yocto at r-finger.com> wrote:
> Hi,
>
> I am trying to get Yocto image built from yesterday's master
> (Linux-3.0.23-yocto-standard) to boot on the NAND-less version of
> BeagleBoard xM, but the kernel panics with:
>
> ----------------- console log start ------------
>
> Waiting for root device /dev/mmcblk0p2...
> mmc0: new SDHC card at address 1234
> mmcblk0: mmc0:1234 SA04G 3.67 GiB (ro)
>  mmcblk0: p1 p2
>
> VFS: Cannot open root device "mmcblk0p2" or unknown-block(179,2)
> Please append a correct "root=" boot option; here are the available
> partitions:
>
> b300         3858432 mmcblk0  driver: mmcblk
>  b301          120456 mmcblk0p1 00000000-0000-0000-0000-000000000mmcblk0p1
>  b302         3445942 mmcblk0p2 00000000-0000-0000-0000-000000000mmcblk0p2
>
> VFS: Unable to mount root fs on unknown-block(179,2)
> User configuration error - no valid root filesystem found
> Kernel panic - not syncing: Invalid configuration from end user prevents
> continuing
>
> -------------- console log end ------------------------------------
>
> My guess would be the problem is the card being detected as 'ro' (line
> 3), but I do not know why that is (there is no lock switch on mmc cards).
>
> The card itself is fine, it's the original card that came with the
> board, the original Angstrom demo boots fine from it, and yocto kernel
> 2.6.37 also used to boot.
>
> Tomas

Looks related to the comment I wrote here:
https://bugzilla.yoctoproject.org/show_bug.cgi?id=1892
I have a slightly different failure with yocto 1.2 beta snapshot (same
kernel) but seems related. Needs more investigation.
Anyone else having problem booting on beagleboard xM? Seems something
wrong happened after 1.1 release...

Andrea