hybrid-graphics-linux team mailing list archive

[Leonardo Rodriguez <draco_rosa@xxxxxxxxxxx>]

can also use su -c 'echo OFF >/sys/kernel/debug/vgaswitcheroo/switch'
for running a single command

--Leo


On 07/28/2011 03:23 PM, Chloë Langley wrote:
> On Thu, 28 Jul 2011 15:42:29 -0300
> Joaquín Ignacio Aramendía<samsagax@xxxxxxxxx>  wrote:
>
> > > VGA-switcheroo is enabled but echo OFF says Permission denied (even
> > with sudo).
> > > $ cat /sys/kernel/debug/vgaswitcheroo/switch
> > > 0:+:Pwr:0000:00:02.0
> > > 1: :Pwr:0000:01:00.0
> > Try:
> > $ su - (enter password)
> > $ echo OFF /sys/kernel/debug/vgaswitcheroo/switch
> >
> > The su command is in a way "stronger" than sudo.
> Alternatively, you can try:
> $ sudo -s
>
> This will give you a root shell without using su.
>
> And do not forget the '>' character!
> $ echo OFF>/sys/kernel/debug/vgaswitcheroo/switch
>
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