1. sources for drivers for the i2c bus The i2c bus is used by many modern motherboards to provide hardware health monitoring data, like temperature and fan speed. The i2c drivers are used by the lm-sensors package to access this data. Note that i2c drivers are available in recent versions of the linux kernel, but the drivers in this package may be more up to date. This package contains the source for the i2c kernel modules. The kernel sources must be installed to compile these modules. From Debian 3.0r0 APT