I've been having problems with computer rebooting so I uninstalled my graphics drivers and reinstalled the latest ones (even though I already had the latest ones).
Since the reinstall my computer freezes for one second every few seconds if I move the mouse. This only happens when I move the mouse, if I just scroll or use my keyboard it doesn't freeze.
Also, this only happens if my TV is connected to HDMI and the TV is turned off. It doesn't happen if the TV is turned on.
Relevant details:
Windows 10 Pro x64 Version 1803
OS Build 17134.48
GPU: AMD RX 470
GPU Driver version: 18.5.1
Displays setup:
DVI 1: Monitor 1
DVI 2: Monitor 2 via digital DVI to VGA adapter
HDMI: TV (one suspect is the cable, it's a 5 meter cable, but why would it only have issues while the TV is off?)
I tried changing the refresh rates but that doesn't seem to have any effect.
My current workaround is to have the TV unplugged when I'm not using it, but that's very inconvenient since I use my PC remotely often.
I'm out of ideas.
The suggested duplicate seems to be a different issue. Also, I remember a few months ago I tried installing amd drivers on my mother's laptop and had the same issue. She has an AMD APU, and no external monitors.
Best Answer
I just got same problem. I've monitor + TV (on hdmi) Normally I use only monitor output, with TV output disabled. I watch a movie on TV Then changed the TV to anouther input But forgot to disable HDMI output on PC And freezes for second every few seconds. I disabled the HDMI out to TV (tv is on another input now) and everything is back to normal