Re: setting brightness as privileged operation?

[Pavel Machek]

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
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