When we run i2cdetect on bus 1 where there is 4 i2c devices attached weg et
this error messages:

 

 

root@debian:/sys/class/i2c-dev/i2c-1/device/1-0050# i2cdetect 1

WARNING! This program can confuse your I2C bus, cause data loss and worse!

I will probe file /dev/i2c-1.

I will probe address range 0x03-0x77.

Continue? [Y/n] y

     0  1  2  3  4  5  6  7  8  incomplete xfer (0x20)

[  277.671755] incomplete xfer (0x20)

9  a  b  c  d  e  f

00:        incomplete xfer (0x20)

[  277.680026] incomplete xfer (0x20)

  -- incomplete xfer (0x20)

[  277.685949] incomplete xfer (0x20)

-- -- incomplete xfer (0x20)

[  277.691958] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.697712] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.703516] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.709279] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.715061] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.720831] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.726586] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.732457] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.738215] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.743991] incomplete xfer (0x20)

--

10: incomplete xfer (0x20)

[  277.750282] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.756059] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.761834] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.767650] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.773432] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.779186] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.784958] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.790734] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.796489] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.802260] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.808016] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.813792] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.819547] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.825329] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.831116] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.836870] incomplete xfer (0x20)

--

20: incomplete xfer (0x20)

[  277.843171] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.848935] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.854734] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.860489] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.866244] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.872022] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.877776] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.883548] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.889308] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.895098] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.900898] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.906654] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.912435] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.918190] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.923963] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.929723] incomplete xfer (0x20)

--

30: incomplete xfer (0x48)

[  277.936015] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  277.941788] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  277.947543] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  277.953320] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  277.959076] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  277.964847] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  277.970624] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  277.976379] incomplete xfer (0x48)

-- incomplete xfer (0x20)

[  277.982151] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.987906] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.993686] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  277.999440] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.005212] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.010987] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.016742] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.022513] incomplete xfer (0x20)

--

40: incomplete xfer (0x20)

[  278.028788] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.034566] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.040322] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.046093] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.051872] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.057627] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.063399] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.069160] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.074940] incomplete xfer (0x20)

-- UU incomplete xfer (0x20)

[  278.080972] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.086727] incomplete xfer (0x20)

-- UU incomplete xfer (0x20)

[  278.092764] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.098519] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.104384] incomplete xfer (0x20)

--

50: UU incomplete xfer (0x48)

[  278.110925] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.116711] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.122493] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.128249] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.134037] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.139791] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.145563] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.151346] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.157099] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.162870] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.168624] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.174401] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.180156] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.185928] incomplete xfer (0x48)

-- incomplete xfer (0x48)

[  278.191708] incomplete xfer (0x48)

--

60: incomplete xfer (0x20)

[  278.197984] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.203756] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.209516] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.215289] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.221060] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.226814] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.232590] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.238345] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.244176] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.249938] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.255710] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.261482] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.267237] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.273014] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.278769] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.284541] incomplete xfer (0x20)

--

70: incomplete xfer (0x20)

[  278.290821] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.296593] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.302388] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.308146] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.313922] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.319677] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.325449] incomplete xfer (0x20)

-- incomplete xfer (0x20)

[  278.331226] incomplete xfer (0x20)

--

 

 

 

We have also tried on marsboard and get the same error, what is wrong?

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