error: "SMBus collision!"/"sending abort" in 2.6.0test2

Mark M. Hoffman mhoffman at
Thu Jul 31 05:04:06 CEST 2003

* Charles Lepple <clepple at> [2003-07-29 21:35:35 -0400]:
> I accidentally started up two copies of a sensord-for-2.6 kludge (just 
> cats a bunch of /sys nodes, and jams the results into rrdtool). A 
> little while after I started the second copy, I started seeing this in 
> my kern.log:
> Jul 29 21:19:45 vole kernel: i2c_adapter i2c-0:  SMBus collision!
> Jul 29 21:19:46 vole kernel: i2c_adapter i2c-0: : Sending abort.
> Jul 29 21:20:17 vole last message repeated 52 times

What I2C bus driver?

What sensors chip driver?

> removing the modules didn't help-- nothing showed up in 
> /sys/bus/i2c/devices afterwards.
> ideas?

I would like to try to reproduce this, but not until this weekend.
Would running 2-3 shell scripts simultaneously which cat the /sys
values to /dev/null be good enough?


Mark M. Hoffman
mhoffman at

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