GUI screen resolution scaling problem

[GvdDool]

What is the bug or the crash?

The GUI resolution is not scaling correctly on my Windows 13'' laptop with Full HD 1080 display. There are several "bugs" or "effects" happening at the same time:

1. the program starts in windowed mode (this is not a problem, but unexpected), and going to full screen only has the bug on the scale bar (where the width of the dropdown box is now set to the full string length instead of the longest list element: Scale listbox do not working in QGIS version 3.30.0-'s-Hertogenbosch #52383

2. when running a process from the toolbox, the screen is changing resolution and is now wider than the display; this can be corrected by going to a windowed view and then returning to full screen, potentially this is related to: Icons too small and other scaling problems on high DPI monitor #40274

3. but when this scaling and rescaling happens, the property window is no longer working (see screenshot) as designed, because the slider (to make the information panel wider) is not going to the right any more, so the text right of the icons is not readable, and sliding to the left is making the information panel oversized.

These GUI problems started by changing from 3.26 to 3.30, and it could be that I made an error by changing some of the settings, but I had to change the settings to make the GUI workable after the upgrade. So, to me, it looks like that there is a more general issue than the two bug reports mentioned above, and something changed in the system settings between the two versions.

Steps to reproduce the issue

Versions

QGIS version
3.30.1-'s-Hertogenbosch
QGIS code revision
9035a01
Qt version
5.15.3
Python version
3.9.5
GDAL/OGR version
3.6.3
PROJ version
9.2.0
EPSG Registry database version
v10.082 (2023-02-06)
GEOS version
3.11.2-CAPI-1.17.2
SQLite version
3.41.1
PDAL version
2.5.2
PostgreSQL client version
unknown
SpatiaLite version
5.0.1
QWT version
6.1.6
QScintilla2 version
2.13.1
OS version
Windows 10 Version 2009

Active Python plugins
coordinate_capture
0.2
DataPlotly
3.9.2
ee_plugin
0.0.6
ImageServerConnector
2.1.1
kmltools
3.1.28
Mergin
2023.1
pcraster_tools
0.2.0
planet_explorer
2.3.0
QuickOSM
2.2.1
quick_map_services
0.19.33
RasterAttributeTable
1.2
wbt_for_qgis
1.0.8
db_manager
0.1.20
grassprovider
2.12.99
MetaSearch
0.3.6
processing
2.12.99

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response

[GvdDool]

To illustrate how the screen changes after running a geo-process (toolbox), but it could also happen at other times - see screenshot.

The main window operations are in the top left of the image, which is also the top left of my screen, the toolbox disappears to the right off-screen.

[nicogodet]

This is likely related to Qt which do not handle correctly different dpi across multiple screen etc...
Not related to QGIS and may be fixed when QGIS switch to Qt6

[GvdDool]

I have only one screen, and in 3.26 the GUI was working normally/stable, in this version pop-up windows, panels, and other Qt elements are not behaving as before.

[nyalldawson]

Should be all fixed in QGIS 3.32 -- please open new tickets for any specific individual hidpi issues remaining after this release