Bug 486756

Summary:	fontconfig to turn antialiasing off freezes KDE plasma
Product:	[Plasma] plasmashell	Reporter:	Daniel Jay Haskin <djhaskin987>
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	kde, nate
Priority:	NOR
Version First Reported In:	6.0.4
Target Milestone:	1.0
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Daniel Jay Haskin 2024-05-07 23:29:49 UTC

SUMMARY

fontconfig set to antialiasing freezes KDE and associated applications.
STEPS TO REPRODUCE
1. Place this in `~/.config/fontconfig/conf.d/10-no-anti-aliasing.conf`: ```
<match target="font">
<edit name="antialias" mode="assign">
<bool>false</bool>
</edit>
</match>```
2. Reboot computer
3. Log in

OBSERVED RESULT

Opened the application "Konsole". It came up but stopped responding. I opened the -- start menu? I guess that's "kicker" -- and typed "q", thinking to open qutebrowser. It froze. I couldn't even pull up a tty (ctrl-alt-f3). I had to power cycle the machine manually. The mouse worked, but the OS stopped responding.

I changed the `false` to `true` in the fontconfig via boot to tty and _then_ logged in, and everything worked again.

ADDITIONAL INFORMATION

Operating System: Fedora Linux 40
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0
Kernel Version: 6.8.8-300.fc40.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-1065G7 CPU @ 1.30GHz
Memory: 7.4 GiB of RAM
Graphics Processor: Mesa Intel® Iris® Plus Graphics
Manufacturer: HP
Product Name: HP Spectre x360 Convertible 13-aw0xxx

Comment 1 Daniel Jay Haskin 2024-05-07 23:58:29 UTC

Indeed, having a fontconfig file there _at all_ seems to cause stability issues. I got a lot further with anti aliasing on but had to remove it altogether to stop the stability issues entirely.

Comment 2 Nate Graham 2024-08-06 21:20:06 UTC

Have you verified that this is a valid fontconfig snippet? Does it work when you place it in a systemwide location, rather than in your home folder?

Comment 3 Bug Janitor Service 2024-08-21 03:47:35 UTC

🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

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

Comment 4 Bug Janitor Service 2024-09-05 03:47:21 UTC

🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.