I have a new computer with an ASRock X99 OC Formula mainboard. I started the ubuntu 16.10 boot dvd and noticed that the keyboard is working, but the mouse pointer is only doing some kind of flickering if I move the mouse. I followed many hints on ask ubuntu but couldn't make it working.
I then installed ubuntu 16.04, which worked perfectly fine. Then I tried to upgrade to ubuntu 16.10 and then things were even worse than with the boot dvd, because neither mouse nor keyboard were working at all. I could boot it into systemd.unit=multi-user.target via grub and then the keyboard worked, but the network dhcp did not come up (further problems …)
Long story short: there seems to be a fundamental issue with my hardware and ubuntu 16.10. It does not seem to be the kernel itself, because the multi-user.target worked. I really tried many things that I found on the internet like "i8042.nomux=1 i8042.reset" kernel parameters or "echo -1 > sys/module/usbcore/parameters/autosuspend" and other things I found, but nothing resolved the problem.
Did something change between 16.04 and 16.10 in the xserver/display-manager/gui part?
I now simply go back to ubuntu 16.04. I only wanted to let others know if they find this problem. If you have a good hint then I am willing to try it out with the boot dvd once again, but the whole process is just VERY time consuming.
Best Answer
Exactly same problem with upgrade from 16.04LTS to 16.10 on an Intel 64bit CPU, usb keyboard and mouse not working from startup.
Luckily, I had Putty remote terminal installed (recommended) on another computer on my LAN, so I could open a remote window. Also found a suggestion to enter:
This worked perfectly. I had tried
sudo apt updatewith no effect, butsudo apt upgradeproduced an output along the lines that xorg was held back, so I was happy to see xorg involved in the reinstall.