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Groups > linux.kernel > #1551798 > unrolled thread

setting brightness as privileged operation?

Started byMichal Hocko <mhocko@kernel.org>
First post2017-01-05 10:30 +0100
Last post2017-01-05 10:30 +0100
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  setting brightness as privileged operation? Michal Hocko <mhocko@kernel.org> - 2017-01-05 10:30 +0100

#1551798 — setting brightness as privileged operation?

FromMichal Hocko <mhocko@kernel.org>
Date2017-01-05 10:30 +0100
Subjectsetting brightness as privileged operation?
Message-ID<sWcwW-Vl-9@gated-at.bofh.it>
Hi,
I have just learned that my Xfce Power Manager cannot manipulate
brightness because I do not have policykit installed on my computer.
There is a reason for that (yeah it depends on systemd which I prefer
not have).

While this is clearly a problem of the Xfce applet I am wondering why
setting the brightness has to be a privileged operation at all. Is there
any strong reason for it or just a general policy that we do not give
world writable files into sysfs?
-- 
Michal Hocko
SUSE Labs

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