Debian 7.9 - kernel upgrade to 4.4 - can't flash eMMC from SD

Grzegorz G

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Dec 16, 2016, 10:53:56 AM12/16/16

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Used debian image:

https://debian.beagleboard.org/images/bone-debian-7.9-lxde-4gb-armhf-2015-11-12-4gb.img.xz

I booted it from SD Card and then i did:

cd /opt/scripts/tools/

git pull

./update_kernel.sh --bone-kernel --lts-4_4

reboot

For now system starts from SD Card fine, but when I try flash eMMC with SD content nothing happend - all leds for a second lights up then no cylon light.

I have uncommented flash cmdline in /boot/uEnv.txt.

If I call flash script manually after system up from SD it starts flashing eMMC but after reboot system wont start from eMMC.

Regards

Grzegorz

Robert Nelson

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Dec 16, 2016, 1:40:23 PM12/16/16

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It looks like the device nodes:

/dev/mmcblk0p1

are not automaticlly being created in 4.4.39-bone14

Regards,

--
Robert Nelson
https://rcn-ee.com/

Robert Nelson

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Dec 16, 2016, 1:50:47 PM12/16/16

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okay, 4.1.x get's passed that:

cd /opt/scripts/tools/
git pull
./update_kernel.sh --bone-kernel --lts-4_1

I'll start comparing 4.1.36-bone24 vs 4.4.39-bone14

Grzegorz G

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Dec 16, 2016, 2:56:40 PM12/16/16

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I did test with TI Kernel:

cd /opt/scripts/tools/

git pull

./update_kernel.sh --ti-channel --lts-4_4

flash eMMC from SD proces started: few cylon led sequence and now all leds are on.

What's main difference betwen bone and TI kernel? I saw in dmesg log that bone kernel not support omap-shim (whatever it is).

Regards

Grzegorz

Robert Nelson

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Dec 16, 2016, 3:10:39 PM12/16/16

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It's a kernel configuration regression in wheezy (which doesn't get
tested anymore).. I've got a version of v4.4.x-bone that works, just
minimizing the config down to the actual breakage..

bone = upstream base + our stuff
ti = upstream base + ti tree + our stuff

Grzegorz G

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Dec 16, 2016, 3:23:57 PM12/16/16

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I gave a second chance to TI kernel to flash eMMC from SD and it was successful - cylon leds then all leds on and auto power off. So now I have working wheezy with 4.4.39-ti-r75 kernel.

I've looked to jessie debian images and I saw that there is TI kernel used - I guess this is the right direction to follow that kernel now and in the future?

Regards

Grzegorz

Robert Nelson

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Dec 16, 2016, 5:10:15 PM12/16/16

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the v4.4.x-ti is the default, but the "bone" is slightly more
optimized for the am335x (being a single core)

v4.4.x-bone is now fixed:

https://github.com/RobertCNelson/bb-kernel/commit/435900739ae38e7761d519cc81c3f5a15b849762

and pushed out as 4.4.39-bone15/4.4.39-bone-rt-r15, it'll be in the
apt repo sometime this weekend..

Grzegorz G

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Dec 16, 2016, 5:29:41 PM12/16/16

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Great!

Thank you very much :)

Regards

Grzegorz

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