[Nouveau] Bug Report on A1286 (Macbook Pro Mid 2012)

[Evan Foss]

On Sun, Nov 27, 2016 at 4:13 AM, Lukas Wunner <lukas at wunner.de> wrote:
> On Sat, Nov 26, 2016 at 06:09:34AM +0000, Evan Foss wrote:
>> I did some other bug reports here a while back. I am back again
>> because I updated my kernel from 3.19.1 to linux-4.8.10-gentoo (if you
>> want I can test the mainline too). On boot all my GPU's turn on. If I
>> turn them off via
>> echo "OFF"> /sys/kernel/debug/vgaswitcheroo/switch
>> I can't turn them back on. They also do not turn on if I try to change
>> GPU's. Trying to stop xdm locks the machine so I can't even turn it
>> off. Suspend/resume still works. None of these problems existed in
>> 3.19.1. I know you will need more info to track down the problem but I
>> wanted to open with this.
>
> I have the same machine and it works for me.  System sleep is only
> supposed to work if both GPUs or ON upon suspend.  Are you issuing
> OFF while X11 is running?  Does it work if X11 is stopped?

1. Boot with the intel GPU driving the screen.
2. In mate desktop turn off the nvidia gpu via echo "OFF" >
/sys/kernel/.../switch
3. Try to do any of the following and the machine locks up turn on the
nvidia GPU, suspend the machine, try to change gpus, stop X (via
/etc/init.d/xdm stop)

Yes I issue OFF while it is running and it works perfectly to turn off
the GPU's. I can tell because the machine gets a lot cooler.

> Best regards,
>
> Lukas



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