Bug 498226

Summary:	Small black dots appear in some applications
Product:	[Plasma] kwin	Reporter:	fphcn588r
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	john.kizer, justin, kde, nate
Priority:	NOR	Keywords:	qt6
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
URL:	https://drive.google.com/file/d/14byXDlZ-QamKaWr1NiPkTnpC-8W2_DDR/view?usp=sharing
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	1 2 3 4 5

Description fphcn588r 2025-01-03 19:54:37 UTC

Hi, I’m using an old machine with an Intel HD Graphics 4000 graphics card. In any application, if I use a black theme, I see black dots, and if I use a white theme, I see white dots. I have observed this on other laptops with the same graphics card. If I switch to my second graphics card, nvidia geforce gt 740m, the problem is solved, but I want to use the intel graphics card and I think this is not a solution because I have another laptop with only intel graphics card. I usually see this black dot problem more in programs written in QT. I will try to add a video. The video has a detailed demonstration of the error.
Note : I am currently using arch linux, but this error appears in all linux distributions that use kde without exception. I encountered this error in Kubuntu, Debian, KDE Neon, Arch, Fedora

SOFTWARE/OS VERSIONS
Linux/KDE Plasma:  Arch Linux
KDE Plasma Version: 6.2.6
KDE Frameworks Version: 6.9.0
Qt Version: 6.8.1

Comment 1 fphcn588r 2025-01-03 20:00:16 UTC

Created attachment 177075 [details]
1

Comment 2 fphcn588r 2025-01-03 20:00:28 UTC

Created attachment 177076 [details]
2

Comment 3 fphcn588r 2025-01-03 20:00:39 UTC

Created attachment 177077 [details]
3

Comment 4 fphcn588r 2025-01-03 20:00:52 UTC

Created attachment 177078 [details]
4

Comment 5 fphcn588r 2025-01-03 20:01:03 UTC

Created attachment 177079 [details]
5

Comment 6 fphcn588r 2025-01-03 20:04:36 UTC

please watch the video : https://streamable.com/edxydn

Comment 7 fphcn588r 2025-01-03 20:22:56 UTC

please watch the video : https://drive.google.com/file/d/14byXDlZ-QamKaWr1NiPkTnpC-8W2_DDR/view?usp=sharing

Comment 8 Justin Zobel 2025-01-04 03:11:20 UTC

Moving to KWin as it is related to all applications and graphical glitching.

Comment 9 Vlad Zahorodnii 2025-01-08 08:50:47 UTC

It looks to me like a graphics driver bug

Comment 10 John Kizer 2025-01-13 19:56:32 UTC

Hi - do these artifacts follow the cursor at all, or is their appearance/location changed when passed over by the cursor?

In the System Settings > Display & Monitor section, are you using a display scaling percentage other than 100%? Are you using a color profile on your display?

Thanks!

Comment 11 fphcn588r 2025-01-14 20:50:00 UTC

(In reply to John Kizer from comment #10)
> Hi - do these artifacts follow the cursor at all, or is their
> appearance/location changed when passed over by the cursor?
> 
> In the System Settings > Display & Monitor section, are you using a display
> scaling percentage other than 100%? Are you using a color profile on your
> display?
> 
> Thanks!

1) These dots do not interact with the cursor in any way. They do not react to the presence and movement of the cursor.
2) I use 100% as the display scaling percentage.
3) I do not use a special color profile.

I also encounter this problem after installing any Linux distribution for the first time, even if I do not customize it and try to use it out of the box.

Finally, I apologize for my bad English

Comment 12 John Kizer 2025-01-15 02:59:43 UTC

(In reply to fphcn588r from comment #11)
> (In reply to John Kizer from comment #10)
> > Hi - do these artifacts follow the cursor at all, or is their
> > appearance/location changed when passed over by the cursor?
> > 
> > In the System Settings > Display & Monitor section, are you using a display
> > scaling percentage other than 100%? Are you using a color profile on your
> > display?
> > 
> > Thanks!
> 
> 1) These dots do not interact with the cursor in any way. They do not react
> to the presence and movement of the cursor.
> 2) I use 100% as the display scaling percentage.
> 3) I do not use a special color profile.
> 
> I also encounter this problem after installing any Linux distribution for
> the first time, even if I do not customize it and try to use it out of the
> box.
> 
> Finally, I apologize for my bad English

Thanks for confirming, and no apology needed!

Does the issue show up if you boot from a Live USB, without installing? And does the issue show up if you boot from a Live USB using a desktop environment other than KDE Plasma?

Comment 13 fphcn588r 2025-01-16 09:24:06 UTC

(In reply to John Kizer from comment #12)
> (In reply to fphcn588r from comment #11)
> > (In reply to John Kizer from comment #10)
> > > Hi - do these artifacts follow the cursor at all, or is their
> > > appearance/location changed when passed over by the cursor?
> > > 
> > > In the System Settings > Display & Monitor section, are you using a display
> > > scaling percentage other than 100%? Are you using a color profile on your
> > > display?
> > > 
> > > Thanks!
> > 
> > 1) These dots do not interact with the cursor in any way. They do not react
> > to the presence and movement of the cursor.
> > 2) I use 100% as the display scaling percentage.
> > 3) I do not use a special color profile.
> > 
> > I also encounter this problem after installing any Linux distribution for
> > the first time, even if I do not customize it and try to use it out of the
> > box.
> > 
> > Finally, I apologize for my bad English
> 
> Thanks for confirming, and no apology needed!
> 
> Does the issue show up if you boot from a Live USB, without installing? And
> does the issue show up if you boot from a Live USB using a desktop
> environment other than KDE Plasma?

When I tried a distribution that uses KDE via live USB, I encountered the problem again. When I tried a distribution that uses GNOME via live USB, I did not encounter this problem in the system interface and the GTK applications in it, but I encountered black dots in Firefox again.