volkodav@Xubuntu-15:~$ sudo ubuntu-drivers autoinstall 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  iucode-tool
The following NEW packages will be installed:
  intel-microcode iucode-tool
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 467 kB of archives.
After this operation, 695 kB of additional disk space will be used.
Get:1 http://us.archive.ubuntu.com/ubuntu/ wily/restricted iucode-tool amd64 1.3-1 [32,6 kB]
Get:2 http://us.archive.ubuntu.com/ubuntu/ wily/restricted intel-microcode amd64 3.20150121.1 [435 kB]
Fetched 467 kB in 1s (298 kB/s)          
Selecting previously unselected package iucode-tool.
(Reading database ... 203965 files and directories currently installed.)
Preparing to unpack .../iucode-tool_1.3-1_amd64.deb ...
Unpacking iucode-tool (1.3-1) ...
Selecting previously unselected package intel-microcode.
Preparing to unpack .../intel-microcode_3.20150121.1_amd64.deb ...
Unpacking intel-microcode (3.20150121.1) ...
Processing triggers for man-db (2.7.4-1) ...
Setting up iucode-tool (1.3-1) ...
Setting up intel-microcode (3.20150121.1) ...
update-initramfs: deferring update (trigger activated)
intel-microcode: microcode will be updated at next boot
Processing triggers for initramfs-tools (0.120ubuntu6) ...
update-initramfs: Generating /boot/initrd.img-4.2.0-19-generic
Warning: /sbin/fsck.btrfs doesn't exist, can't install to initramfs, ignoring.