Why does this happen?
When connecting to a Windows computer, you may notice that the list of resolutions in Display Settings is limited to a maximum of 1024 x 768 or 1280 x 1024.
This is a limitation of Windows - since it cannot detect a connected display, a limited selection of "safe" resolutions is offered.
Is there a way to avoid this issue?
If possible, connect a monitor to the VNC Server computer and ensure it is powered on. If this is not an option and the computer is virtual, or has to be run headless, there are some methods to work around this, listed below.
Connect a display emulation device to the VNC Server computer
If you are connecting to VNC Server on a physical computer, you can connect an EDID emulator to the VNC Server computer. An example EDID emulator can be seen here
Note: RealVNC have not tested this particular emulator and it is only provided as an example
Configure Windows to use a different resolution
It may be possible to force Windows to provide a specific resolution. This is usually only possible on desktop computers.
PLEASE NOTE: The below option involves editing of the Registry, and should only be attempted on a non-production/non-critical machine, before rolling out to your production environment. We recommend backing up the Registry prior to making any changes.
Manual method
In this example, we will be setting a resolution of 1920 x 1080.
- Open Regedit
- Navigate to
HKLM\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Configuration - Select the key(s) that start with the name
SIMULATED(orNOEDIDifSIMULATEDdoes not exist) and then select the child key named 00 - Change the value
PrimSurfSize.cxto the desired horizontal resolution (1920). Be sure to select 'Decimal' when changing these values. - Change the value
PrimSurfSize.cyto the desired vertical resolution (1080). - Select the child key of 00 also named 00.
- Change the value of
ActiveSize.cxto the same horizontal resolution as before (1920). - Change the value of
ActiveSize.cyto the same vertical resolution as before (1080).
After a reboot, the simulated display should now be at the resolution you set.
This method was sourced from https://superuser.com/questions/990398/setting-display-resolution-beyond-1024x768-with-headless-windows-10)
Comments
This is very helpful and seems to be going in the right direction. I have tried this and did not resolve the problem yet. I have also updated Stride and still not having any luck. Anything else that I should try?
As per the last comment. No effect at all :( Why Windows....why? Can someone have a go?
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