[Nouveau] GP106M+Intel Skylake, Kernel 4.10-rc3 : No display on HDMI or DP

[Sylvain Fabre]

Hi all, 

On my recent MSI Apache Pro laptop with Intel Skylake + GP106M Nvidia chip, i am unable 
to use the external HDMI and DP outputs. The outputs are available thru xrandr and can 
be activated, but the connected monitors always show a black screen. 

Note that the integrated LCD is connected to the Skylage GPU, while the HDMI and DP 
outputs are connected to the NVIDIA GP106M GPU.

The nouveau drive outputs the following data in the dmesg log, kernel-4.10-rc3 on 
Opensuse Tumbleweed : 
[    5.939763] *nouveau*: detected PR support, will not use DSM 
*nouveau* 0000:01:00.0: enabling device (0006 -> 0007) 
*nouveau* 0000:01:00.0: NVIDIA GP106 (136000a1) 
*nouveau* 0000:01:00.0: bios: version 86.06.29.00.04 
*nouveau* 0000:01:00.0: fb: 3072 MiB GDDR5 
*nouveau* 0000:01:00.0: priv: HUB0: 00d054 00000007 (1d408216) 
*nouveau* 0000:01:00.0: DRM: VRAM: 3072 MiB 
*nouveau* 0000:01:00.0: DRM: GART: 1048576 MiB 
*nouveau* 0000:01:00.0: DRM: BIT table 'A' not found 
*nouveau* 0000:01:00.0: DRM: BIT table 'L' not found 
*nouveau* 0000:01:00.0: DRM: TMDS table version 2.0 
*nouveau* 0000:01:00.0: DRM: DCB version 4.1 
*nouveau* 0000:01:00.0: DRM: DCB outp 00: 02001f62 00020010 
*nouveau* 0000:01:00.0: DRM: DCB outp 01: 04013f86 04600010 
*nouveau* 0000:01:00.0: DRM: DCB outp 02: 04013f82 00020010 
*nouveau* 0000:01:00.0: DRM: DCB conn 01: 00010161 
*nouveau* 0000:01:00.0: DRM: DCB conn 03: 01000346 
*nouveau* 0000:01:00.0: DRM: Pointer to flat panel table invalid 
*nouveau* 0000:01:00.0: hwmon_device_register() is deprecated. Please convert the 
driver to use hwmon_device_register_with_info(). 
*nouveau* 0000:01:00.0: DRM: failed to create kernel channel, -22 
*nouveau* 0000:01:00.0: DRM: allocated 1024x768 fb: 0x60000, bo ffff92d669dd7000 
*nouveau* 0000:01:00.0: fb0: *nouveau*fb frame buffer device 
*nouveau* 0000:01:00.0: vgaarb: changed VGA decodes: olddecodes=io
+mem,decodes=none:owns=none 
*nouveau* 1.3.1 20120801 for 0000:01:00.0 on minor 1 
*nouveau* 0000:01:00.0: DRM: suspending console... 
*nouveau* 0000:01:00.0: DRM: suspending display... 
*nouveau* 0000:01:00.0: DRM: evicting buffers... 
*nouveau* 0000:01:00.0: DRM: waiting for kernel channels to go idle... 
*nouveau* 0000:01:00.0: DRM: suspending client object trees... 
*nouveau* 0000:01:00.0: DRM: suspending kernel object tree... 
*nouveau* 0000:01:00.0: DRM: resuming kernel object tree...

I suspect the issue is due to this line : 
[    6.827434] *nouveau* 0000:01:00.0: DRM: failed to create kernel channel, -22 

Any help or advice are welcome, 

Thanks

LeRatier


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