On Sat, Mar 19, 2011 at 2:16 PM, Jean Delvare <khali@xxxxxxxxxxxx> wrote: > Hi Andrew, > > On Sat, 19 Mar 2011 14:04:42 +0000, Andrew Lyon wrote: >> The subject sums it up really, I've just upgraded my Alix 2D13 system >> (http://www.pcengines.ch/alix2d13.htm) from 2.6.37 to 2.6.38 and the >> sensors have disappeared, lm90 still loads and there are no errors but >> no sensors are detected. >> >> What's really strange is that there seem to have been no changes to >> the lm90 code between the working and broken versions: >> >> alixbuild src # diff linux-2.6.37-gentoo-r2/drivers/hwmon/lm90.c >> linux-2.6.38-gentoo/./drivers/hwmon/lm90.c >> alixbuild src # diff >> linux-2.6.37-gentoo-r2/./include/config/sensors/lm90.h >> linux-2.6.38-gentoo/./include/config/sensors/lm90.h >> >> Very strange, any ideas? > > The LM90 and compatible are SMBus (I2C) devices. Most likely the > underlying SMBus or I2C controller driver changed, causing the adapter > to disappear so the lm90 driver doesn't see its device. > > If you can, go back to your 2.6.37 kernel, and check in the output of > "sensors" which SMBus or I2C adapter the LM90 or compatible device is > connected to. This is where your investigation should start. A > comparison of the outputs of "i2cdetect -l" between both kernels (after > loading the required i2c-dev driver) will certainly reveal something. > > -- > Jean Delvare > Hi, Thanks for the info, I'm not sure how it happened but scx200_acb was not enabled, with that loaded the sensors now work again. Andy _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
