Bug 419155

Summary: Transparency stopped working
Product: [Plasma] kwin Reporter: nuc <nucrap>
Component: compositingAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: normal CC: nucrap, rulatir
Priority: NOR    
Version First Reported In: 5.18.3   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: qdbus org.kde.KWin /KWin supportInformation

Description nuc 2020-03-23 18:19:25 UTC
Since the latest updates, transparency stopped working on my machine.

My GPU is an AMD RX470 with open drivers.
Comment 1 Vlad Zahorodnii 2020-03-25 12:53:04 UTC
Please post output of
    qdbus org.kde.KWin /KWin supportInformation
Comment 2 Szczepan Hołyszewski 2020-03-26 07:10:26 UTC
Just in case your issue is the same that I recently had: a recent Plasma update might have reset your Plasma theme to vanilla Breeze. If you were using a community Breeze variant with enhanced transparency, it's possible that you didn't notice that the theme was changed because it looks mostly the same, except for enhanced transparency.
Comment 3 nuc 2020-03-26 08:29:19 UTC
Created attachment 127020 [details]
qdbus org.kde.KWin /KWin supportInformation
Comment 4 nuc 2020-03-26 08:34:01 UTC
Ok it works again. Seems plasma auto disabled it because of a crash.

It happened without me being notified, or I did not notice the notification.