Unresponsive mouse and keyboard on login screen (macbook pro 2015)

When I boot the laptop from shutdown state (not resuming or awakening), it quickly goes to the login screen as normal but the mouse and keyboard seem unresponsive, but not completely:

Every like 5-7 seconds I'm able to enter a keystroke or move the mouse. Using those time windows I'm able to enter the password and successful login.

Once I login, the laptop works perfectly fine and stable.

This is the log I recorded today when it happened again: http://pastebin.com/zaDp9xg9

It happens every time I fully reboot or shutdown the laptop, don't have any problems with suspension and awakening.

If I reboot resetting the PRAM, the problem doesn't appear until the next shutdown reboot. So what I usually do is reset the PRAM every time I boot.

I reinstalled the OS from scratch and the issue is still there. I also use FileVault.

Have anybody experienced a similar issue? Do you see anything strange in the log?

Thanks

Solution 1:

Took the laptop the the official service and it was a faulty I/O board. They changed it and now it's working fine. Notice that I didn't get a full motherboard replace, just something called "I/O Board".

Solution 2:

I was just having problems with logging into my MacBook Pro, the cursor was moving but the password field wasn’t showing and I couldn’t seem to select anything on the screen. The tab key didn’t work, but the arrow keys did! I just hit the down arrow and the password field appeared enabling me to enter my password....phew! Thought I would share in case it helps others....