usb - Keyboard and Mouse only work in Recovery Mode Ubuntu 16.04 LTS - Ask Ubuntu


i got intel nuc kit nuc5pgyh. has 8gb of ram , 500gb hdd.

the problem

for last week i've been trying install ubuntu 16.04 lts usb drive. each time i'm able install os. however, when load os, once gui mouse , keyboard stop working. there power coming mouse @ least (as can see red light bottom of mouse).

the keyboard , mouse both work in bios settings , startup of computer, , work during installation process. additionally, if load ubuntu in recovery mode keyboard , mouse work!!

what i've tried

  • i've tried using different usb ports , usb hub, both made no difference.
  • i've tried loading older kernels (not in recovery), again keyboard , mouse don't work.
  • i've loaded ubuntu in recovery mode, , run sudo apt-get update && sudo apt-get upgrade successfully. updated intel graphics card drivers. however, still when reboot system keyboard , mouse don't work.
  • i've made sure bios has usb legacy support on, still no change.
  • i've edited grub.conf file (based on other suggestions) turn on iommu, grub_cmdline_linux="iommu=soft", still no change.
  • i've run boot repair, again no change.

if has suggestions or advice i'd appreciate it, don't know else do!!

thank you

at first doing these whenever mouse stop working:

sudo rmmod usbhid sudo modprobe usbhid

then tried this, , worked ever since!

sudo aptitude purge irqbalance

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