https://bugs.kde.org/show_bug.cgi?id=516128
Bug ID: 516128
Summary: Gemini (https://www.google.com/search?q=google.com)
causes massive File Descriptor leak (>23k open files)
and CPU spike.
Classification: Applications
Product: Falkon
Version First 25.12.2
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: critical
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Technical Bug Report
Title: High CPU Usage, Temperature Spike, and File Descriptor Leak (LSOF > 20k)
on Falkon Browser
Environment:
OS: Arch Linux (Kernel: latest/rolling)
Browser: Falkon (QtWebEngine based)
Platform: Gemini (gemini.google.com)
Issue observed: February 2026
Description:
Gemini enters an unresponsive state where it fails to process queries. During
this hang, the system load exceeds 1.0, CPU usage spikes to 40%+, and laptop
temperature increases significantly. This behavior is exclusive to Falkon;
Firefox performs normally under the same conditions. Clearing cache and using
Incognito mode does not resolve the issue.
Technical Evidence:
A check on open files during the hang shows an abnormal amount of file
descriptors associated with the Falkon process:
sudo lsof | grep falkon | wc -l yields 23,940 open files.
This suggests a massive resource leak (possibly in the socket handling or
script execution layer) when interacting with Gemini's real-time response
scripts.
Steps to Reproduce:
Open Gemini in Falkon on Arch Linux/sway.
Enter a simple query.
Observe the UI hanging, CPU/Temp spike, and the exponential growth of open
files in lsof.
Additional information: qt6-webengine 6.10.2-1
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