Bug 470628

Hi,

Thanks for setting this to confirmed.

Apparently the title was renamed from:

* "Unable to configure screen size and position"

to:

* "Option to use less than screen's native resolution with the picture displayed at 100% scale and centered within the screen, rather than expanded to fit it"

Changing it back to "Unable to configure screen size and position", because the original comment (comment #0) also includes the following:

> Additionally, an option should be added which allows to change the position
> of the pixel by pixel image, so that the image can be moved around freely,
> instead of limiting it to a centered position.
> 
> This would allow to move the image up and down (and left and right) and
> essentially would allow to perform height adjustments on monitors/TVs which
> do not have a height adjustable stand.

Please feel free to comment if the positioning part should be submitted separately. 

Regards

PS:

According to https://drmdb.emersion.fr/properties/3233857728/scaling%20mode there already seems to be a "ScalingMode" drm property for this.

Which can be set to:

* None
* Full
* Center
* Full Aspect

This is exactly what already exists on MS Windows and is what was meant with:

> Such an option already exists in the Intel/AMD/NVIDIA graphics control
> panels on MS Windows.

But KDE Plasma does not have a UI setting to adjust it.

It could be added to "System Settings -> Display and Monitor -> Display Configuration", via an additional drop-down, similar to the already existing "RGB Range" drop-down.

KDE Plasma also already seems to be aware of this "ScalingMode" drm property in some way, according to:

* https://invent.kde.org/plasma/kwin/-/blob/master/src/backends/drm/drm_connector.cpp

But there is no UI setting for it in "System Settings -> Display and Monitor -> Display Configuration".

It would be appreciated if a "Scaling Mode" drop-down could be added to  "System Settings -> Display and Monitor -> Display Configuration" to adjust this drm property.

Changed the title from:

* "Unable to configure screen size and position"

to:

* "Unable to configure "ScalingMode" drm property"

Regards

The scaling mode property stays as it is, it's quite broken, at least with amdgpu.

Hi,

If the "ScalingMode" drm property is not a valid option and it instead needs to be implemented by KDE Plasma, it would likely be beneficial. Because this then would probably allow more flexibility and would probably also allow to implement the positioning feature mentioned earlier.

Being able to adjust the position of the pixel-by-pixel image (i.e. image that has lower than native resolution but is still being displayed pixel-by-pixel), would be very helpful.

Some newer Samsung 4K (3840x2160) 16:9 TVs (for example) have a built-in feature, which allows to set the resolution to 3840x1080 for a 32:9 aspect ratio and then allows to move the image to the top or middle or bottom of the TV screen, to basically mimic a height adjustable stand. It's explained in the following video, starting at 02:59 mins (and 04:31 mins):

* https://www.youtube.com/watch?v=L9u7nYAM5OU

If this could be implemented via KDE Plasma, it would be very helpful. Especially if KDE Plasma would allow to set any resolution and would allow to move around / position the image freely.

Because then this feature would no longer be limited to some TVs only but could essentially be used on any TV. And it would essentially allow to put a large TV onto a desk and use it as a regular computer monitor (with smaller image for the shorter viewing distance) and would allow to height adjust the image (which otherwise would not be possible due to most TVs not having a height adjustable stand).

Regards