Nouveau - Nov 2016 - Bug Report on A1286 (Macbook Pro Mid 2012)

Hi Folks,

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.
>From my lspci
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core
processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce
GT 650M Mac Edition] (rev ff)

Thanks,
Evan

-- 
Home
http://evanfoss.googlepages.com/
Work
http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/

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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?

Best regards,

Lukas

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


-- 
Home
http://evanfoss.googlepages.com/
Work
http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/

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