Hi Jason, On Mon, 16 Oct 2006 09:28:14 -0400, Jason Craig wrote: > I seem to be able to run i2cdump for all of these addresses except 0x69, which > from what I gathered from the I2C tools page > (http://netroedge.com/~lm78/i2ctools.html <http://netroedge.com/%7Elm78/i2ctools.html>) seems to be a clock chip. Page which no longer exists, BTW, so I wonder how you read it. > Here is the output I get for this address. > # i2cdump -y 0 0x69 b > 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef > 00: 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f ???????????????? > 10: 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f ???????????????? > 20: 0f 1f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f ???????????????? > 30: 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f 0f ???????????????? > 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 > > Basically, the first 4 lines of output are output as normal with a slight delay > between echos, but then there is a short pause, and the rest of the lines are > output immediately with no delay. Subsequent i2cdump commands generate the > following output immediately (no delay like before for the first 4 lines). > > # i2cdump -y 0 0x69 b > 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 > > I am assuming that I am hosing some hardware registers each time I try to dump > this clock chip. Maybe I shouldn't be trying to do that?? I'm not exactly > sure. The i2cdumps behave the same way until I reboot the system. I've tried > removing the modules from the kernel and then installing them again, but the > problem? remains. Our FAQ has the following entry of interest: Q: What is at I2C address 0x69? A: A clock chip. Often, accessing these clock chips in the wrong way will instantly crash your computer. Sensors-detect carefully avoids these chips, and you should do too. You have been warned. > Furthermore, subsequent i2cdetect commands give the following output: > # i2cdetect -y 0 > 0 1 2 3 4 5 6 7 8 9 a b c d e f > 00: XX XX XX XX XX XX XX XX XX XX XX XX XX > 10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX > 20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX UU XX > 30: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX > 40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX > 50: UU XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX > 60: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX > 70: XX XX XX XX XX XX XX XX > > Which shows that I don't have the same addresses as before. > > Thanks for any suggestions. You're good for a cold boot at this point. -- Jean Delvare
