This happens for me too from time to time.
DISTRIB_ID=LinuxMint DISTRIB_RELEASE=17.1 DISTRIB_CODENAME=rebecca DISTRIB_DESCRIPTION="Linux Mint 17.1 Rebecca"
On a Dell Precision M4600.
This happens for me too from time to time.
DISTRIB_ ID=LinuxMint RELEASE= 17.1 CODENAME= rebecca DESCRIPTION= "Linux Mint 17.1 Rebecca"
DISTRIB_
DISTRIB_
DISTRIB_
On a Dell Precision M4600.