nouveau driver freeze -- can anyone else reproduce this?

[poma]

On 27.04.2015 19:58, Joerg Lechner wrote:
> Hi,
> 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?
> Kind Regards
> 
> 
> 
> -----Ursprüngliche Mitteilung----- 
> Von: AV <volovics at ziggo.nl>
> An: For testing and quality assurance of Fedora releases <test at lists.fedoraproject.org>
> 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
>> <http://bumblebee-project.org/>,
> 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
> screen.
> 
> 
> My experience is that since the inclusion of PRIME gpu offloading
> the
> nouveau driver seems to handle power management and switching
> adequately by
> itself, at least on older Nvidia Optimus chips.
> 
> And you can get relevant info
> on the state through:
>   # cat /sys/kernel/debug/vgaswitcheroo/switch
> 
> And turn
> on/off the gpu driving the output by
>   # echo ON/OFF >
> /sys/kernel/debug/vgaswitcheroo/switch
> 
> Connect the graphics connectors with:
>  
> # echo IGD/DIS > /sys/kernel/debug/vgaswitcheroo/switch
> 
> AV
> 

http://nouveau.freedesktop.org/wiki/Optimus/
What I remember I played successfully with DRI setups a few months back.
But this machine isn't currently here.