Re: setting brightness as privileged operation?

From	Pavel Machek <pavel@ucw.cz>
Newsgroups	linux.kernel
Subject	Re: setting brightness as privileged operation?
Date	2017-05-11 23:10 +0200
Message-ID	<tG3vs-37w-13@gated-at.bofh.it> (permalink)
References	<sWcwW-Vl-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

On Thu 2017-01-05 10:23:07, Michal Hocko wrote:
> 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?

Well, if you have another user logged in using ssh, and changing _your_
brightness, that will be somehow annoying, right?

That's the reason why global settings should be root-only...

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Re: setting brightness as privileged operation? Pavel Machek <pavel@ucw.cz> - 2017-05-11 23:10 +0200
  Re: setting brightness as privileged operation? Michal Hocko <mhocko@kernel.org> - 2017-05-12 08:30 +0200
    Re: setting brightness as privileged operation? Pavel Machek <pavel@ucw.cz> - 2017-05-12 11:50 +0200
      Re: setting brightness as privileged operation? Michal Hocko <mhocko@kernel.org> - 2017-05-17 13:10 +0200

csiph-web