https://bugs.kde.org/show_bug.cgi?id=516128

Kanishk Ranjan <[email protected]> changed:

           What    |Removed                     |Added
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                 CC|                            |[email protected]

--- Comment #2 from Kanishk Ranjan <[email protected]> ---
I can’t reproduce this on a similar stack.

Environment: Ubuntu 26.04.1 LTS, Plasma 6.6.6 (KWin Wayland), Frameworks
6.24.0, Falkon 25.12.3, libqt6webenginecore6 6.10.2 (same QtWebEngine as the
report), software rendering (llvmpipe).

While running several Gemini queries, CPU spikes briefly while a response
streams, then returns to idle. Real fd counts from /proc/PID/fd stay flat: main
falkon process ~130, renderer ~32, zygotes ~13.

Note that sudo lsof | grep falkon | wc -l reports [N] on the same session,
because lsof prints a row per thread and also lists memory-mapped files. The
~24k figure in the report probably overstates the real fd count by a large
factor.

Could you, during the hang:

Run ls /proc/$(pgrep -o falkon)/fd | wc -l a few times to see whether the real
count grows.
Run ls -l /proc/$(pgrep -o falkon)/fd | awk '{print $NF}' | sed 's/:.*//' |
sort | uniq -c | sort -rn | head to show which fd types dominate.
Say which GPU/driver you’re using on sway.

My test used software rendering, so if this is a GPU/dmabuf path issue on
wlroots compositors, I wouldn’t hit it.

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