https://bugs.kde.org/show_bug.cgi?id=415591
Bug ID: 415591
Summary: Multi-monitor QT applications window sizing
inconsistencies
Product: kwin
Version: 5.17.4
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: devddu...@gmail.com
Target Milestone: ---
SUMMARY
I’ve been using Plasma for a couple of days now and I noticed some strange
window sizing issues. It seems like QT application windows don’t respect window
size changes when dealing with a my multi-monitor setup. If I open a QT
application on my center or right monitor and resize the window, close the
application and open it again the window size will never persist. Only the left
monitor retains window size changes (however Kate is an exception). Strangely
enough this problem never occurs when dealing with GTK applications.
I’ve found three cases related to this issue:
Case 1, Ark and Okular:
These two applications always copy over the window size that was last changed
on the left monitor. In other words if I change the window size on the center
or right monitor the window size never changes. It always reverts back to the
last window size that was set on the left monitor.
Example Ark: https://youtu.be/uK9Rh5DG2Nw
Example Okular: https://youtu.be/uYCmiDxNnN8
Case 2, Kate:
Kate varies a little from the previous case. When the application is opened and
the window size is changed on the left monitor there are again no problems. If
the application is opened and closed on either the center or right monitor and
the opened again the window size is reset to the small default size.
Example: https://youtu.be/3o_g-wbbNow
Case 3, Gnote and Celluloid:
These two applications always retain the change window size, regardless of what
monitor the window size was changes on. This is what I would consider intended
behavior.
Example Gnote: https://youtu.be/pCq2UyrLK4I
Example Celluloid: https://youtu.be/cjw4-zsiHb0
STEPS TO REPRODUCE
Varies from case but usually goes something like this:
1. Open application on center monitor (having a multi-monitor setup).
2. Resize the application window.
3. Close the application.
4. Open the same application again.
5. Observe that the window size has not persisted.
OBSERVED RESULT
Kate, Ark and Okular do not persist window size changes if those changes were
made on either my center or right monitors.
EXPECTED RESULT
The expected result is the same as how the GTK based applications currently
behave, as shown in the video example. Basically if I open an application on my
center monitor and resize it, then close the application and then open it again
the window size should be persisted.
I’ve provided some general information below. If anyone requires any logs,
config files or other information, please let me know.
SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux
KDE Plasma Version: 5.17.4
KDE Frameworks Version: 5.64.0
Qt Version: 5.13.2
Kernel Version: 5.4.2-1-MANJARO
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-4790K CPU @ 4.00GHz
Memory: 7,7 GiB of RAM
ADDITIONAL INFORMATION
Monitor setup:
Left monitor: 1680x1050
Center monitor: 2560x1440
Right monitor: 1080x1920
Applications:
Kate: 19.08.3
Ark: 19.08.3
Okular: 1.8.3
Gnote: 3.34.1
Celluloid: 0.18
$ xrandr -q
Screen 0: minimum 320 x 200, current 5320 x 1920, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected primary 2560x1440+1680+351 (normal left inverted right x axis
y axis) 597mm x 336mm
2560x1440 59.95*+
1920x1080 60.00 50.00 59.94
1920x1080i 60.00 50.00 59.94
1280x1440 59.91
1680x1050 59.88
1280x1024 75.02 60.02
1440x900 59.90
1280x960 60.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
DVI-0 connected 1080x1920+4240+0 left (normal left inverted right x axis y
axis) 531mm x 299mm
1920x1080 60.00*+
1600x1200 60.00
1680x1050 59.88
1280x1024 60.02
1440x900 59.90
1280x960 60.00
1152x720 59.97
1024x768 60.00
800x600 60.32 56.25
640x480 66.67 59.94
DVI-1 connected 1680x1050+0+110 (normal left inverted right x axis y axis)
474mm x 296mm
1680x1050 59.95*+
1600x1200 60.00
1280x1024 75.02 60.02
1440x900 74.98 59.90
1280x960 60.00
1280x720 60.00
1024x768 75.03 70.07 60.00
832x624 74.55 75.01
800x600 72.19 75.00 60.32 56.25
640x480 75.00 72.81 66.67 59.94
720x400 70.08
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