What is this unknown device? It defaulted to "do not use this device" and said "this device is not working". I had to choose the proprietary option and now it says "This device is using an alternative driver".
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2You can find your answer here. http://askubuntu.com/questions/613579/unknown-additional-driver-processor-microcode-firmware-for-intel-cpus-for-intel – Ljiljan Veselinovic May 13 '16 at 20:31
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According to intel :
The microcode data file contains the latest microcode definitions for all Intel® processors. Intel releases microcode updates to correct processor behavior as documented in the respective processor specification updates. While the regular approach to getting this microcode update is via a BIOS upgrade, Intel realizes that this can be an administrative hassle. The Linux* operating system and VMware ESX* products have a mechanism to update the microcode after booting. For example, this file will be used by the operating system mechanism if the file is placed in the /etc/firmware directory of the Linux system.
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