There's an article
about that at phoronix.org, and this important note at lm-sensors.org
September 5th, 2013: Hardware breakage reported Over the past few months, we had several reports of sensors-detect causing serious trouble on recent hardware (most notably laptops.) We still don't know what exactly is happening, and while it might be reversible, we don't know how, so in practice this is equivalent to the hardware itself being broken. The symptoms are that the display starts misbehaving ( wrong resolution or wrong gamma factor.) We have mitigated the risk by changing the default behavior of sensors-detect to no longer touch EDID EEPROMs and then to no longer probe graphics adapters at all unless the user asks for it. We urge maintainers to backport changesets r6040 and r6084 to all Linux distributions which are still shipping lm-sensors 3.3.2 or older. Versions 3.3.3 and newer are not affected.
Slackware-current is not impacted, but earlier versions should be updated, I guess.
Hope this helps.