[systemd-bugs] [Bug 55902] tmpfiles fails to write to /sys/kernel/debug/vgaswitcheroo/switch on boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=55902

--- Comment #2 from Lennart Poettering <lennart at poettering.net> ---
This is a general race between loading modules and applying the /sys change.
Basically, "tmpfiles" is simply not the tool to make the change you are
attempting. Instead, please use a udev rule that writes the file in question as
the hw shows up. That's the only way how to properly serialize the actions.

Which reminds me that I actually have had on my TODO list for a while to post a
blog story about how to properly apply /sys and /proc/sys settings to a device
without these races.

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