https://bugs.kde.org/show_bug.cgi?id=462190

Akhra Gannon <[email protected]> changed:

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--- Comment #4 from Akhra Gannon <[email protected]> ---
chiming in to report that I'm also affected by this. symptoms match and
work-around works so I'll skip logs, but I have a few circumstantial
observations.

I run karaoke shows from a laptop. it was on Garuda(/Arch+KDE) Linux until
earlier this week, and hadn't been updated in several months as it wasn't being
used for anything else. I'd moved to CachyOS(/Arch+KDE) on my desktop, and this
week decided to switch the laptop over too. at that point, the 2TB Western
Digital drive holding my karaoke library would no longer mount through KDE,
displaying the "not authorized" error as described here. I brought it to my
desktop, and it wouldn't mount there either. however, a 128GB flash drive
mounts fine on either. both drives are exfat; `fsck.exfat` reports no errors.
when I found `sudo mount` in a terminal worked, I ran with that as a quick fix.

two possibly helpful insights from this:

- my immediate suspicion (before finding sfdriver's udisks2 bug thread) was a
timeout issue, because the karaoke collection I'm using has almost 200k files
in a single folder and that's something FAT is historically terrible with. it
works well enough when directly accessing individual files, but full directory
listings can be VERY slow. so if e.g. Dolphin is trying to pre-cache an index
of drive contents before telling the user the drive is mounted, that could
easily exceed a naive timeout.

- I can't say exactly when the last proper update was on my laptop before this
week, but the absolute maximum is six months. while the original bug report
here is two years old, whatever change has caused it to crop up again is almost
certainly new in 2025.

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