Bug 388197

Summary: Change of font causes 100% CPU Utilization in plasmashell
Product: [Plasma] plasmashell Reporter: paulcee33
Component: generic-performanceAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: normal CC: heri+kde, nate, noahadvs, plasma-bugs-null
Priority: NOR    
Version First Reported In: 5.11.4   
Target Milestone: 1.0   
Platform: openSUSE   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description paulcee33 2017-12-24 16:43:48 UTC 
Linux: openSUSE Tumbleweed
Plasma version 5.11.4
Framework version 5.41.0
QT version 5.9.3. 
64 Bit CPU, kernel 4.14.

Description: Change font for menus/display through "Configure Desktop" (systemsettings5) from Noto Sans to a user-installed Truetype font. Rebooting will cause plasmashell to go to 100% CPU utilization. Changing font back causes normal behavior.

Reproducible: Yes, by changing fonts from the 'stock' font selections to any user-installed Truetype font and rebooting. 

Fix/work-around: running systemsettings5 from command-line (which is somewhat responsive), and changing font back, and restarting X (CTRL-ALT-Backspace twice) will bring plasmashell back to normal load.
Comment 1 David Edmundson 2017-12-29 00:09:36 UTC 
Can you tell us which exactly font you used?

I can't reproduce here.

Also, this only happens after reboot, not when you apply the font?
Comment 2 paulcee33 2017-12-29 16:02:43 UTC 
I've tried two from the Avenir font family (LT 45 book, and LT 55 Roman), both of which are Truetype fonts installed through the "Configure Desktop" (systemsettings5) menu, as system fonts. 

And it seems to follow a restart of X, not just a reboot. After setting font things *APPEAR* to work fine, until restart of X and/or reboot (which of course, restarts X). After that, 100% CPU from plasmashell. Reset font back to Noto/other pre-installed font, reset, and normal CPU.
Comment 3 Noah Davis 2023-08-10 17:21:56 UTC 
Is this still a problem with Plasma 5.27? I've never experienced this issue with user installed TrueType fronts in Plasma 5.26 and 5.27, so the issue may be gone.
Comment 4 Bug Janitor Service 2023-08-25 03:45:21 UTC 
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
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If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
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Thank you for helping us make KDE software even better for everyone!
Comment 5 Bug Janitor Service 2023-09-09 03:45:17 UTC 
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!