would like to try, but "vgaswitcheroo" seems to be ubuntu, can not find this in
F22 directory in /.../debug
If possible I would like to switch to Nvidia chip without using an second external screen
but using the Nouveau driver,
to test this Geeqie problem.
Is there a similar "tool" in F22 as switcheroo in Ubuntu?
Von: AV <volovics(a)ziggo.nl>
An: For testing and quality assurance of Fedora releases
Verschickt: Mo, 27 Apr 2015 6:21 pm
Betreff: Re: nouveau driver freeze -- can anyone else reproduce this?
On 04/27/2015 02:17 PM, Matthew Miller wrote:
> On Mon, Apr 27, 2015 at
04:48:37AM -0400, Joerg Lechner wrote:
>> If it's an "optimus", is in case of
Geeqie the Nvidia Driver activen
>> or another driver ?
> It is indeed
Optimus. Out of the box, Fedora doesn't support switching
> as Windows does.
There are some experimental support for this
but it's not very active. So, failing
> that, you can switch in the BIOS setup
screen. In my case, since I'm
> using an external monitor, I needed to set it to
Nvidia, because the
> Intel GPU is only attached to the laptop's built-in
My experience is that since the inclusion of PRIME gpu offloading
nouveau driver seems to handle power management and switching
itself, at least on older Nvidia Optimus chips.
And you can get relevant info
on the state through:
# cat /sys/kernel/debug/vgaswitcheroo/switch
on/off the gpu driving the output by
# echo ON/OFF >
Connect the graphics connectors with:
# echo IGD/DIS > /sys/kernel/debug/vgaswitcheroo/switch
What I remember I played successfully with DRI setups a few months back.
But this machine isn't currently here.