Turning off monitor moves all windows to the other monitor

[aesca]

I have dual monitor setup. Because my primary monitor malfunctions sometimes I have to turn it off and on every once in a while. This causes all windows to be moved to the other monitor. How do I disable this behavior? I don't want the system to react to it in any way.

It used to be different, the system didn't react to turning off the monitor. But after I switched video cards (radeon 290x -> radeon rx 570) windows started moving.

Linux Mint 19
No proprietary drivers
Primary monitor is connected via HDMI, secondary - via DVI

[lsemmens]

I have not obseved that problem on any of my dual monitor setups As per the "before you post" instructions. (relvant part quoted below) can we please have some more info?

5] Details! Details! Details!
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[aesca]

Sorry, here is the relevant info:

Code: Select all

System:    Host: aesca-PC Kernel: 4.15.0-38-generic x86_64
           bits: 64 gcc: 7.3.0
           Desktop: Cinnamon 3.8.9 (Gtk 3.22.30-1ubuntu1)
           Distro: Linux Mint 19 Tara
Graphics:  Card: Advanced Micro Devices [AMD/ATI] Ellesmere [Radeon RX 470/480]
           bus-ID: 01:00.0
           Display Server: x11 (X.Org 1.19.6 )
           drivers: ati,amdgpu (unloaded: modesetting,fbdev,vesa,radeon)
           Resolution: 1920x1200@59.95hz, 1280x1024@60.02hz
           OpenGL: renderer: Radeon RX 570 Series (POLARIS10 / DRM 3.23.0 / 4.15.0-38-generic, LLVM 6.0.0)
           version: 4.5 Mesa 18.0.5 Direct Render: Yes