[yocto] Not booting on BeagleBoard xM 0x2

[Gary Thomas]

On 2012-04-04 06:50, Bruce Ashfield wrote:
> On 12-04-04 08:04 AM, Andrea Galbusera wrote:
>> 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...
>
> We are working on several bugs on our reference beagleboard. The problem
> is that my beagleboard died (a horrible painful death) and the other boards
> that are directly available to are RevC and they are booting. So things
> are slowed down a bit .. but we are trying to get to the bottom of it,
> as fast as possible.

Just FYI, it also doesn't boot on my rev-C3 (not xM), albeit with a different
error pattern.  It hangs at this point:
   Waiting for root device /dev/mmcblk0p2...
   mmc0: error -110 whilst initialising SD card

Looks like you might need the attached patch?

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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