Bug 374659

Summary:	Windows on HiDPI scaled display are small on the first run
Product:	[Plasma] kwin	Reporter:	Szymon Łągiewka <bugs-kde>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	kde
Priority:	NOR
Version First Reported In:	5.8.5
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Szymon Łągiewka 2017-01-06 22:06:22 UTC

This is somehow related to https://bugs.kde.org/show_bug.cgi?id=369196
I get the same result on the first showing of Yakuake. I was also able to reproduce it with MEGAsync when after starting a fresh instance and opening app window from tray. 

Possibly related: most windows that I start are shrank. This was tested on i.e. Wayland info, Dolphin, System settings and couple other programs.

Demo: https://drive.google.com/drive/folders/0B3ahLC5Mtqw3QktNTVZTc1U5dVE?usp=sharing

Also, when I was resizing those pictures in Gwenview, I noticed that the window that opened on `Resize` action was ridiculously small as well.

Comment 1 Szymon Łągiewka 2017-01-06 22:13:22 UTC

And one of the most annoying things is also the leaving dialog. I added appropriate photo to the demo folder.

Comment 2 Szymon Łągiewka 2017-01-06 22:51:24 UTC

Lock screen takes apx. 1/4 of the screen in the upperleft corner.

Comment 3 Martin Flöser 2017-01-09 20:15:41 UTC

what's your scale settings?

Comment 4 Szymon Łągiewka 2017-01-09 20:18:56 UTC

Scaling is done by a factor of 2. The native resolution is 3200x1800.

Comment 5 Martin Flöser 2017-01-10 05:49:50 UTC

Please disable any scaling. That is not supported yet.

Comment 6 Szymon Łągiewka 2017-01-11 18:30:23 UTC

Ok, understood. Since scaling is a requirement for my setup, I will try Wayland session again once scaling is supported (ideally for multi-monitor setups).

Comment 7 David Edmundson 2017-06-09 14:39:42 UTC

>Please disable any scaling. That is not supported yet.

It is supported now. How are you setting your scaling?

Comment 8 Szymon Łągiewka 2017-06-09 21:07:03 UTC

Before 5.10 I was using kscreen KCM.
With 5.10. I started using DrmOutputs in kwinrc as instructed.

The issues are not appearing anymore. You can change the status of the bug to whatever it needs to have.