Hello All,

We are using BBB for some years now for our product . Some month ago due to 
the new revision of BBB we had to switch the base image from debian 7.9 to 
debian 8.6 IoT (from beagleboard.org) . so far everything ok with any type 
of rev C BBB .. We tried to update an older BBB which is of revision B and 
then got some issues with i2c , i2c-1 and i2c-2 do not work anymore .

Our way of working with emmc is to burn an entire image onto it.

I checked dmesg on both revision and besides the timeout I get when trying 
to access i2c-1 and i2c-2 , I got the same initialisation messages 
concerning i2c.

When I do i2cdetect -r -y 1 , it is slow and do not show any device adress 
(plus some timeout messages in dmesg) .

So question is , what is the difference between rev C and B in terms of i2c 
configuration ? (beside the fact that the name of the device has been 
switched but this should not be an issue here)

Any advice , idea welcome.



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