Windows has changed my monitor settings overnight and I cannot seem to revert them?

[sastusbulbas]

Hi all,

I run two monitors, Main monitor is connected by HDMI currently and is a 4k 160hz 27" display and was set as Primary, monitor 1 in my settings. The box is still ticked.
Second monitor is a 1080p 120hz display and was connected with a DP cable and set in Portrait, extended, monitor 2 in my settings.

Monitors were set like this for the past month, cables are this way simply because the 1080p had been connected to a different PC previous and needed DP to hit 120hz on it's older GPU.

Only today when I boot up, all my icons are on the left portrait monitor and despite the 4k being ticked as the main display, the main display is now number 2 the secondary portrait is now number 1. Nothing seems to revert this back to how it was previous unless I run the system as a single display on second screen only.

Has anyone else ever experienced this? Google simply has me go through the motions of ticking the primary display box. I have rebooted, tried swapping priorities, and nothing sets my main monitor back to display 1 with all the icons?

I will try unplugging the DP cable from the GPU. But this not being resolved at the desktop is bugging me.

 

[Nemiyen]

We get random issues like this at work and if you haven't already tried this, turn your PC off and power both monitors off at the wall. Turn the monitors back on after a couple of minutes (20 seconds isn't long enough due to residual power in the PSU) and then turn the PC on.

Might not work for you and could be a dodgy cable but that fixes our weirdness when the monitors won't display properly. We use Dell monitors and I can guarantee they have a standby glitch that needs a full power cycle to fix.

 

[sastusbulbas]

I have swapped the cables over.

I now have my main monitor as display 1, and the box is again ticked, but now again my icons are all over on display 2 which is the 1080p portrait monitor now numbered as 2. And as its connected by HDMI now it's only a 60hz display (old monitor needs DP or dual DVI) . This is ridiculous.

Edit, strangely enough, if I position the second monitor to now sit on the right hand side, the icons go to the main monitor. This makes no sense.

 

[nade]

Does sound pretty odd. Have you checked/confirmed the resolution and other details are set correctly for each monitor?

Might be worth trying a windows driver reset (Windows key + Ctrl + Shift + B) to see if that helps at all.