Not booting on BeagleBoard xM 0x2

Hi Tomas,

On Wed, Apr 4, 2012 at 12:14 PM, Tomas Frydrych

Post by Tomas Frydrych
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
----------------- 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
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

Bruce Ashfield

2012-04-04 12:50:21 UTC

Post by Andrea Galbusera
Hi Tomas,
On Wed, Apr 4, 2012 at 12:14 PM, Tomas Frydrych

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.

Cheers,

Bruce

Post by Andrea Galbusera
Andrea
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Gary Thomas

2012-04-04 14:10:25 UTC

Post by Andrea Galbusera
Hi Tomas,
On Wed, Apr 4, 2012 at 12:14 PM, Tomas Frydrych

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?

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

Andrea Galbusera

2012-04-04 14:58:19 UTC

Hi Gary,

Post by Gary Thomas

Post by Andrea Galbusera
Hi Tomas,
On Wed, Apr 4, 2012 at 12:14 PM, Tomas Frydrych

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

That's exactly the same error I see! Happy to know am not alone...

Post by Gary Thomas
Looks like you might need the attached patch?

I'm going to give it a try as soon as I can. Did you already submit it
somewhere?

Andrea

Gary Thomas

2012-04-04 15:06:57 UTC

Post by Andrea Galbusera
Hi Gary,

Post by Gary Thomas

Post by Andrea Galbusera
Hi Tomas,
On Wed, Apr 4, 2012 at 12:14 PM, Tomas Frydrych

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

That's exactly the same error I see! Happy to know am not alone...

Post by Gary Thomas
Looks like you might need the attached patch?

I'm going to give it a try as soon as I can. Did you already submit it
somewhere?

I haven't had a chance to try it yet. I got it from the meta-ti layer.

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

Robert Berger

2012-04-04 18:49:32 UTC

Garry/Andrea,

I am currently giving a training based on the Beagle-XM an this error
happened at the same time on 5 boards with a 3.1 kernel.

Post by Tomas Frydrych
Waiting for root device /dev/mmcblk0p2...
mmc0: error -110 whilst initialising SD card

The fix was to change the SD cards and use cards from a different
manufacturer, so yes, it seems to be related to some funny SD card timings.

I did not try to patch yet.

Regards,

Robert

..."To assert that the earth revolves around the sun is as erroneous as
to claim that Jesus was not born of a virgin." - Cardinal Bellarmine
1615, during the trial of Galileo

My public pgp key is available at:
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x90320BF1

Chris Tapp

2012-04-04 19:11:08 UTC

Post by Robert Berger
Garry/Andrea,
I am currently giving a training based on the Beagle-XM an this error
happened at the same time on 5 boards with a 3.1 kernel.

Post by Tomas Frydrych
Waiting for root device /dev/mmcblk0p2...
mmc0: error -110 whilst initialising SD card

The fix was to change the SD cards and use cards from a different
manufacturer, so yes, it seems to be related to some funny SD card timings.

Not sure if it help, but the Raspberry Pi team have been having problems with SD cards as well. Some work, some don't - even when they have the same part numbers. Seems as if some silicon / firmware revision along the way has changed something somewhere...

Chris

Tomas Frydrych

2012-04-05 05:31:49 UTC

Post by Gary Thomas

Post by Andrea Galbusera
Hi Tomas,
On Wed, Apr 4, 2012 at 12:14 PM, Tomas Frydrych

Just FYI, it also doesn't boot on my rev-C3 (not xM), albeit with a different
Waiting for root device /dev/mmcblk0p2...
mmc0: error -110 whilst initialising SD card
Looks like you might need the attached patch?

This is a different issue. I get this too with one particular MMC card,
but with 2.6.37 kernel, if I unplug this card and plug it back in the
boot resumes and completes successfully. If I do this with the 3.0.2
kernel, the bug I described with the associated kernel panic then kicks in.

Tomas

Post by Gary Thomas
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Ryan Julian

2012-06-12 23:00:32 UTC

Post by Tomas Frydrych
This is a different issue. I get this too with one particular MMC card,
but with 2.6.37 kernel, if I unplug this card and plug it back in the
boot resumes and completes successfully. If I do this with the 3.0.2
kernel, the bug I described with the associated kernel panic then kicks in.
Tomas

Post by Andrea Galbusera
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Bruce and Tomas,
Did you ever find a solution to this issue?

I'm encountering the same issue on the BB-xM Rev C. I've tested on two different
boards from different production runs, both with an error identical to Tomas'.
I'd be happy to run tests/provide logs if given instructions.

Thanks!

-Ryan

Bruce Ashfield

2012-06-12 23:10:49 UTC

Post by Andrea Galbusera
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Bruce and Tomas,
Did you ever find a solution to this issue?
I'm encountering the same issue on the BB-xM Rev C. I've tested on two different
boards from different production runs, both with an error identical to Tomas'.
I'd be happy to run tests/provide logs if given instructions.

We did. Denys provided us a fix, the only one that was available at the time:

commit a49b0ec1356bb15a6a8c76b76c464ab3f1f61840
Author: Bruce Ashfield <bruce.ashfield-***@public.gmane.org>
Date: Tue Apr 17 13:45:47 2012 -0400

meta/beagleboard: disable CONFIG_PREEMPT

The boot hangs with the message:
mmc0: error -110 whilst initialising SD card

The MMC driver has issues initializing when PREEMPT is enabled
(either forced
or voluntary). Unplugging and then plugging the card back will reset the
driver and continue booting. Alternatively, disable preemption.

Signed-off-by: Denys Dmytriyenko <denys-***@public.gmane.org>
Signed-off-by: Bruce Ashfield <bruce.ashfield-***@public.gmane.org>

:000000 100644 0000000... 0cbeb5a... A bsp/beagleboard/no-preempt.cfg
:000000 100644 0000000... 1e75e15... A bsp/beagleboard/no-preempt.scc

Cheers,

Bruce

Post by Ryan Julian
Thanks!
-Ryan
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thee at its end"

Bruce Ashfield

2012-06-13 02:34:00 UTC

Hi Bruce,
The build I'm using already includes Denys' patch.
I was referring to Tomas' original problem, in which the MMC card
successfully initialized, but the kernel still panics while trying to mount
mmcblk0p2. These two seem unrelated, unless I'm mistaken.

The two issues that we worked with ended up both being resolved by the preempt
disable patch. Both stemmed from the MMC card not being recognized, and that
was due to in kernel preemption.

So we may be seeing something different yet again here ..

Cheers,

Bruce

Post by Andrea Galbusera
_______________________________________________
yocto mailing list
https://lists.yoctoproject.org/listinfo/yocto

Bruce and Tomas,
Did you ever find a solution to this issue?
I'm encountering the same issue on the BB-xM Rev C. I've tested on two different
boards from different production runs, both with an error identical to Tomas'.
I'd be happy to run tests/provide logs if given instructions.

commit a49b0ec1356bb15a6a8c76b76c464ab3f1f61840
Date: Tue Apr 17 13:45:47 2012 -0400
meta/beagleboard: disable CONFIG_PREEMPT
mmc0: error -110 whilst initialising SD card
The MMC driver has issues initializing when PREEMPT is enabled
(either forced
or voluntary). Unplugging and then plugging the card back will reset
the
driver and continue booting. Alternatively, disable preemption.
:000000 100644 0000000... 0cbeb5a... A bsp/beagleboard/no-preempt.cfg
:000000 100644 0000000... 1e75e15... A bsp/beagleboard/no-preempt.scc
Cheers,
Bruce

Post by Ryan Julian
Thanks!
-Ryan
_______________________________________________
yocto mailing list
https://lists.yoctoproject.org/listinfo/yocto

--
"Thou shalt not follow the NULL pointer, for chaos and madness await
thee at its end"

Tomas Frydrych

2012-06-13 06:46:09 UTC

The two issues that we worked with ended up both being resolved by the preempt
disable patch. Both stemmed from the MMC card not being recognized, and that
was due to in kernel preemption.

IIRC, both of these went away with a kernel update, but I am now using a
kernel from meta-ti, so I can't verify that.

Tomas

Ryan Julian

2012-06-12 23:38:37 UTC

Hi Bruce,

The build I'm using already includes Denys' patch.

I was referring to Tomas' original problem, in which the MMC card
successfully initialized, but the kernel still panics while trying to mount
mmcblk0p2. These two seem unrelated, unless I'm mistaken.

Post by Andrea Galbusera

in.