Bug 481573

Summary:	Crash upon clicking disabled system font NVIDIA wayland.
Product:	[Applications] systemsettings	Reporter:	Victor Rijnoveanu <hackandgo3>
Component:	kcm_fontinst	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	crash	CC:	hackandgo3, nate
Priority:	NOR	Keywords:	qt6
Version First Reported In:	5.93.0
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Victor Rijnoveanu 2024-02-20 10:48:53 UTC

SUMMARY

I have disabled the Segoe UI Emoji font. After I have done that, system settings closed itself. I re-opened system settings, looked up the same font again and tried to expand its dropdown menu. It has crashed. It returns the following error message:

X Error of failed request:  BadLength (poly request too large or internal Xlib length error)
  Major opcode of failed request:  139 (RENDER)
  Minor opcode of failed request:  20 (RenderAddGlyphs)
  Serial number of failed request:  460
  Current serial number in output stream:  832

I thought it was an NVIDIA proprietary driver on wayland moment. Sure enough it was. I tried the same thing on my AMD integrated graphics laptop on wayland, no crash. Tried them both on X11, no crash.

STEPS TO REPRODUCE
0. Get NVIDIA system, preferably 10 series.
1. Open systemsettings.
2. Go to font management.
3. Disable system font.
4. Might need to close and reopen systemsettings.
5. Look up the same disabled system font again.
6. Click to expand dropdown menu.

OBSERVED RESULT

Crash

EXPECTED RESULT

Allow me to re-enable the font

SOFTWARE/OS VERSIONS
Linux: 6.7.5
KDE Plasma Version: 5.93.0
KDE Frameworks Version: 5.249.0
Qt Version: 6.7.0

ADDITIONAL INFORMATION

GTX 1060 3gb.
nvidia-dkms 545.29.06-4
egl-wayland 2:1.1.13-1

Comment 1 Nate Graham 2025-10-10 17:57:18 UTC

Thank you for the bug report, and I'm sorry we weren't able to look into it yet. A lot has changed since it was reported; can I ask you to see if this is still an issue with Plasma 6.4 or later? Thanks a lot!

Comment 2 Victor Rijnoveanu 2025-10-10 18:05:22 UTC

(In reply to Nate Graham from comment #1)
> Thank you for the bug report, and I'm sorry we weren't able to look into it
> yet. A lot has changed since it was reported; can I ask you to see if this
> is still an issue with Plasma 6.4 or later? Thanks a lot!

Apologies I no longer have my NVIDIA system. Works fine on a 9070 XT tho.

Comment 3 Nate Graham 2025-10-10 18:06:08 UTC

Thanks for the info, and sorry we didn't get to it sooner.