Bug 379886

Summary: When in @2x HghDPI, VNC downscales and re-scales up
Product: [Applications] krdc Reporter: Thiago Macieira <thiago>
Component: VNCAssignee: Urs Wolfer <uwolfer>
Status: RESOLVED WORKSFORME    
Severity: normal CC: lukas.hetzenecker
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Screenshot with Scale 1
Screenshot with Scale 2

Description Thiago Macieira 2017-05-16 01:46:56 UTC
Created attachment 105575 [details]
Screenshot with Scale 1

For example, when connecting to a Mac that is running at native 1920x1080 (no HighDPI on the other side), with a local 3200x1800 highdpi screen:

Test 1:
run QT_SCREEN_SCALE_FACTORS=1 krdc and connect

In this case, the remote's 1920x1080 is scaled up to 3200x1800 and looks sharp. See Screenshot_Scale1.png

Test 2:
run QT_SCREEN_SCALE_FACTORS=2 krdc and connect

In this case, the remote's 1920x1080 is downscaled to 1600x900 and then scaled back up to 3200x1800. It looks blurred. See Screenshot_Scale2.png
Comment 1 Thiago Macieira 2017-05-16 01:52:18 UTC
Created attachment 105576 [details]
Screenshot with Scale 2
Comment 2 Justin Zobel 2022-11-06 09:24:55 UTC
Thank you for reporting this issue in KDE software. As it has been a while since this issue was reported, can we please ask you to see if you can reproduce the issue with a recent software version?

If you can reproduce the issue, please change the status to "REPORTED" when replying. Thank you!
Comment 3 Thiago Macieira 2022-11-07 17:31:40 UTC
Problem does indeed appear to be gone.