Bug 466158 - Blurry glitchiness with 150% scale
Summary: Blurry glitchiness with 150% scale
Status: RESOLVED FIXED
Alias: None
Product: kwin
Classification: Plasma
Component: wayland-generic (show other bugs)
Version: 5.27.0
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-02-20 19:25 UTC by gudvinr+kde
Modified: 2024-08-20 20:56 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed In: 6.2.0
Sentry Crash Report:

Attachments
panel screenshot (20.38 KB, image/png)
2023-02-20 19:25 UTC, gudvinr+kde 		Details
panel only (2.62 MB, image/jpeg)
2023-02-22 09:08 UTC, gudvinr+kde 		Details
full screen (3.00 MB, image/jpeg)
2023-02-22 09:10 UTC, gudvinr+kde 		Details
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Description gudvinr+kde 2023-02-20 19:25:28 UTC 
Created attachment 156544 [details]
panel screenshot

SUMMARY

Time in digital clock applet is cut off at the top.
Panel height is 26, screen scale is 150%

Time format: "ddd, MMM d"

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.27.0
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.1.12-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Graphics Processor: AMD Radeon RX Vega M GL Graphics
Comment 1 Nate Graham 2023-02-21 22:11:51 UTC 
Yikes, the screenshot shows blurry glitchiness everywhre, with the clock text being a symptom of that.
Comment 2 gudvinr+kde 2023-02-21 23:40:20 UTC 
Huh, I am not sure why screenshot looks THAT bad, it doesn't look nearly as bad in person but when I open screenshot it also looks horrible to me.
Comment 3 gudvinr+kde 2023-02-22 08:58:40 UTC 
So, I tried to use a ruler to see if it's my eyes fooling me or something funny going on here.

If I open screenshot I sent in gwenview and set 100% scale, height of the panel is the same (5.5-6.0mm) but on screenshot it looks blurry as hell. I am attaching macro photo for you to see.

BUT if I do full screenshot, I get 4k image and if I set 100% scale for that image in gwenview, panel noticeably smaller (it has 4mm height) which should not be happening if I set 100% scale of image taken from this screen while viewing it on the same screen.

It almost looks like screenshots are taken in some weird virtual space instead of whatever buffer is rendered onto screen and then scaled when I do cropped screenshot but aren't if I take full screen image.
Comment 4 gudvinr+kde 2023-02-22 09:08:36 UTC 
Created attachment 156591 [details]
panel only

Here's photo of panel (top) and png screenshot (thus loseless) of panel I sent here, opened in gwenview, 100% scale.

You can see jagged edges on round objects (such as color picker or rsi break icon) that you can also see on screenshot images. Yet it's okay on real panel.
Comment 5 gudvinr+kde 2023-02-22 09:10:15 UTC 
Created attachment 156592 [details]
full screen

Here's photo of panel (top) and image of full screen screenshot opened in gwenview (100% scale).
You can clearly see that image in gwenview is smaller (but there are no visual artifacts here).
Comment 6 Nate Graham 2024-08-20 20:56:30 UTC 
This is fixed at least as of Plasma 6.2.0, possibly earlier.