So the chip is not responding at all on the non-working boards. Perhaps it has not been initialized or released from reset? Does it make a difference if you go into the BIOS (or especially the BIOS hardware monitoring screen) before you boot? Have you asked Intel? Locate the ADM1025 on a working board. Is it also present on the non-working boards? Thomas Lazic wrote: > > Hi, > > thanks a lot for your answer > Now it appears that 2 boards are working and 9 do not. > > All boards have the same bios version but we dont know anything about the > hardware revision. It is always the same type of board (Intel D850MV). > > Please see below the output of sensors on the working board und i2cdump on > both the working and non-working board. > > Regards. > Thomas > > working board > > host:/ # sensors > adm1025-i2c-1-2d > Adapter: SMBus I801 adapter at efa0 > Algorithm: Non-I2C SMBus adapter > +2.5V: +2.47 V (min = +2.22 V, max = +2.72 V) > VCore: +1.44 V (min = +1.38 V, max = +1.69 V) > +3.3V: +3.23 V (min = +2.93 V, max = +3.59 V) > +5V: +4.97 V (min = +4.45 V, max = +5.44 V) > VCC: +3.33 V (min = +2.93 V, max = +3.59 V) > SYS Temp: +36.0C (min = +0C, max = +60C) > CPU Temp: +37.0C (min = +0C, max = +60C) > > eeprom-i2c-0-50 > Adapter: bt848 #0 > Algorithm: Bit-shift algorithm > > eeprom-i2c-1-50 > Adapter: SMBus I801 adapter at efa0 > Algorithm: Non-I2C SMBus adapter > > eeprom-i2c-1-51 > Adapter: SMBus I801 adapter at efa0 > Algorithm: Non-I2C SMBus adapter > > host:/lm_sensors2/prog/dump# ./i2cdump 1 0x2d > Warning: no size specified (using byte-data access) > WARNING! This program can confuse your I2C bus, cause data loss and > worse! > I will probe file /dev/i2c-1, address 0x2d, mode byte > You have five seconds to reconsider and press CTRL-C! > > 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef > 00: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b [[[[[[[[[[[[[[[[ > 10: 5b 5b 5b 5b 5b 00 5b 5b 5b 5b 5b 5b 5b 5b 5b 00 [[[[[.[[[[[[[[[. > 20: be 7c bc bf 00 c2 24 24 5b 5b 5b d1 ab 91 76 d1 ?|??.?$$[[[???v? > 30: ab d1 ab d1 ab d1 ab 3c 00 3c 00 5b 5b 5b 41 29 ???????<.<.[[[A) > 40: 01 00 01 5b 5b 5b 5b 0e 5b 80 5b 5b 5b 5b 5b 5b ?.?[[[[?[?[[[[[[ > 50: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b [[[[[[[[[[[[[[[[ > 60: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b [[[[[[[[[[[[[[[[ > 70: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b [[[[[[[[[[[[[[[[ > 80: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b [[[[[[[[[[[[[[[[ > 90: 5b 5b 5b 5b 5b 00 5b 5b 5b 5b 5b 5b 5b 5b 5b 00 [[[[[.[[[[[[[[[. > a0: be 7a bc bf 00 c2 25 24 5b 5b 5b d1 ab 91 76 d1 ?z??.?%$[[[???v? > b0: ab d1 ab d1 ab d1 ab 3c 00 3c 00 5b 5b 5b 41 29 ???????<.<.[[[A) > c0: 01 00 01 5b 5b 5b 5b 0e 5b 80 5b 5b 5b 5b 5b 5b ?.?[[[[?[?[[[[[[ > d0: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b [[[[[[[[[[[[[[[[ > e0: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b [[[[[[[[[[[[[[[[ > f0: 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b 5b [[[[[[[[[[[[[[[[ > > non-working board > > host:/lm_sensors2/prog/dump# ./i2cdump 1 0x2d > Warning: no size specified (using byte-data access) > WARNING! This program can confuse your I2C bus, cause data loss and > worse! > I will probe file /dev/i2c-1, address 0x2d, mode byte > You have five seconds to reconsider and press CTRL-C! > > 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef > 00: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > 10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > 20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > 30: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > 40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > 50: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > 60: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > 70: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > 80: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > 90: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > a0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > b0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > c0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > d0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > e0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX > f0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
