Bug 503294 - Internal screen's contents become blurry when external screen is connected
Summary: Internal screen's contents become blurry when external screen is connected
Status: REPORTED
Alias: None
Product: kwin
Classification: Plasma
Component: multi-screen (other bugs)
Version First Reported In: 6.3.4
Platform: KDE Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords: multiscreen
: 503307 (view as bug list)
Depends on:
Blocks:
 
Reported: 2025-04-24 15:38 UTC by eifr
Modified: 2025-04-28 15:10 UTC (History)
4 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:


Attachments
blurry icons after connecting external monitor (6.94 KB, image/png)
2025-04-24 15:38 UTC, eifr
Details
sharp icons after disabling and re-enabling built-in display (7.87 KB, image/png)
2025-04-24 15:39 UTC, eifr
Details
Blurry (whole screen) (1.06 MB, image/png)
2025-04-25 15:16 UTC, eifr
Details
sharp - after workaround (whole screen) (992.64 KB, image/png)
2025-04-25 15:17 UTC, eifr
Details

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Description eifr 2025-04-24 15:38:50 UTC
Created attachment 180614 [details]
blurry icons after connecting external monitor

SUMMARY
I have 2 monitors, built-in with 150% scaling and external with 200%. 
when I connect the external, the system tray icons becomes blurry (see attached).

i was able to make them sharp again by disabling and re-enabling the built-in display through the "display configuration"

STEPS TO REPRODUCE
1. 150% scaling on first monitor
2. connect a second monitor

OBSERVED RESULT
blurry icons in system tray

EXPECTED RESULT
icons in system tray should be sharp

SOFTWARE/OS VERSIONS
(available in the Info Center app, or by running `kinfo` in a terminal window)
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.13.0
Qt Version: 6.9.0
Comment 1 eifr 2025-04-24 15:39:20 UTC
Created attachment 180615 [details]
sharp icons after disabling and re-enabling built-in display
Comment 2 Nate Graham 2025-04-25 11:11:24 UTC
Does this happen for any other icons on the same panel? Or any other icons elsewhere in Plasma or a QML-based app like System Monitor or Discover on the same screen?
Comment 3 Nate Graham 2025-04-25 11:22:46 UTC
*** Bug 503307 has been marked as a duplicate of this bug. ***
Comment 4 Nate Graham 2025-04-25 11:23:42 UTC
From Bug 503307 it seems like wallpapers are a bit blurry too; do you also see this?
Comment 5 eifr 2025-04-25 15:13:52 UTC
it's hard to see if there's any difference in the background. but other icons in the panel are also affected. 
I'll also correct myself regarding the workaround, in order to make the icons sharp:
1. connect external
2. disable built in monitor
3. disconnect external
4. re-connect external
5. re-enable built in monitor

im also attaching a whole screen screenshots
Comment 6 eifr 2025-04-25 15:16:18 UTC
Created attachment 180649 [details]
Blurry (whole screen)
Comment 7 eifr 2025-04-25 15:17:06 UTC
Created attachment 180651 [details]
sharp - after workaround (whole screen)
Comment 8 Nate Graham 2025-04-28 15:10:09 UTC
Since this appears to affect the entire screen contents, I'm moving this to KWin for further investigation.