Usability denied: [Bug 419015] KRDC does not correctly detect screen resolution if display is scaled

[email protected] has denied  Usability:
Bug 419015: KRDC does not correctly detect screen resolution if display is
scaled
https://bugs.kde.org/show_bug.cgi?id=3D419015



--- Description ---
SUMMARY

If I scale my display, KRDC fails to detect the current correct screen
resolution in connection settings, using real resolution divided by scaling
factor. The connected RDP session will use that "scaled" resolution. If the
real screen resolution is set manually ("Custom Resolution"), the RDP sessi=
on
window fits the whole screen but also shows an ugly scrollbar on the border=
s of
the screen.

NOTE that Kubuntu package manager does not provide me with the option to try
later version of KRDC.

STEPS TO REPRODUCE

1. Ensure display scale is set 1. Bring up KRDC, observe "Current Screeen
Resolution" setting (3840x2160 in my case).

2.  Scale display (I use 1.6). Relog/reboot. Bring up KRDC, observe new
"Current Screeen Resolution" setting (2400x1350 in my case).

3. Connect to Windows desktop for both cases, observe difference. Try to se=
tup
the real screen resolution for RDP sessionfor the scaled screen (3840x2160 =
in
my case), connect to observe the described effect.

EXPECTED RESULT

KRDC uses real current screen resolution regardless of scale factor

SOFTWARE/OS VERSIONS
Windows: 7 Enterprise (connecting to it using RDP)
macOS:=20
Linux/KDE Plasma: Kubuntu 19.10
(available in About System)
KDE Plasma Version: 5.16.5
KDE Frameworks Version: 5.62.0
Qt Version: 5.12.4
Kernel Version: 5.3.0-42.generic
OS Type: 64 bit

ADDITIONAL INFORMATION

Compositor rendering backend: OpenGL 3.1

xrandr output:

Screen 0: minimum 8 x 8, current 7680 x 2160, maximum 16384 x 16384
DP-3.2 connected 3840x2160+0+0 (normal left inverted right x axis y axis) 6=
98mm
x 393mm
   3840x2160	 60.00*+  29.98    29.97    25.00    23.98=20=20
   1920x2160	 59.99=09
   1920x1080	 60.00	  59.94    50.00=20=20
   1680x1050	 59.95=09
   1440x900	 74.98	  59.89=20=20
   1280x1024	 75.02	  60.02=20=20
   1280x960	 60.00=09
   1280x720	 60.00	  59.94    50.00=20=20
   1024x768	 75.03	  60.00=20=20
   800x600	 75.00	  60.32=20=20
   720x576	 50.00=09
   720x480	 59.94=09
   640x480	 75.00	  72.81    59.94    59.93=20=20
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 connected primary 3840x2160+3840+0 (normal left inverted right x axis y
axis) 346mm x 194mm
   3840x2160	 60.00*+
DP-5 disconnected (normal left inverted right x axis y axis)
DP-6 disconnected (normal left inverted right x axis y axis)