https://bugs.freedesktop.org/show_bug.cgi?id=110830

            Bug ID: 110830
           Summary: [nouveau] GeForce GTX 1660 Ti (mobile) not supported
                    (NV168/TU116)
           Product: xorg
           Version: 7.7 (2012.06)
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: mszpak-5tc4TXWwyLM@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

The GeForce GTX 1660 Ti mobile card doesn't seem to be supported by nouveau:
> kernel: ACPI Warning: \_SB.PCI0.GFX0._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20181213/nsarguments-59)
> kernel: ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20181213/nsarguments-59)
> kernel: pci 0000:01:00.0: optimus capabilities: enabled, status dynamic power, hda bios codec supported
> kernel: VGA switcheroo: detected Optimus DSM method \_SB_.PCI0.PEG0.PEGP handle
> kernel: nouveau: detected PR support, will not use DSM
> kernel: nouveau 0000:01:00.0: enabling device (0106 -> 0107)
> kernel: nouveau 0000:01:00.0: unknown chipset (168000a1)
> kernel: nouveau: probe of 0000:01:00.0 failed with error -12

Linux starts up with the Intel card, but unfortunately in Hyperbook NH5/Clevo
NH55RCQ the HDMI output seems to be wired to NVidia card :-/, so I cannot
external display with nouveau.

More information about my hardware:
> $ lspci | grep -i nvidia
> 01:00.0 VGA compatible controller: NVIDIA Corporation TU116M [GeForce GTX 1660 Mobile] (rev a1)
> 01:00.1 Audio device: NVIDIA Corporation Device 1aeb (rev a1)
> 01:00.2 USB controller: NVIDIA Corporation Device 1aec (rev a1)
> 01:00.3 Serial bus controller [0c80]: NVIDIA Corporation Device 1aed (rev a1)

(Output for lspcii -vv)
> 01:00.0 VGA compatible controller: NVIDIA Corporation TU116M [GeForce GTX 1660 Mobile] (rev a1) (prog-if 00 [VGA controller])
>	Subsystem: CLEVO/KAPOK Computer Device 8550
>	Flags: bus master, fast devsel, latency 0, IRQ 16
>	Memory at b3000000 (32-bit, non-prefetchable) [size=16M]
>	Memory at a0000000 (64-bit, prefetchable) [size=256M]
>	Memory at b0000000 (64-bit, prefetchable) [size=32M]
>	I/O ports at 4000 [size=128]
>	Expansion ROM at b2000000 [disabled] [size=512K]
>	Capabilities: <access denied>
>	Kernel modules: nouveau

A quick search [1] suggests that preliminary support for TU117 exists in master
and TU116 might be added once required hardware is accessible. I'm creating
this ticket to make it easier to track progress of adding support for TU116 in
nouveau.

Tested with Fedora 30 with kernel 5.0.9-301.fc30.x86_64.

[1] -
https://github.com/torvalds/linux/commit/f266fdc7609a416c4f9c64f25930958717fa1bd7

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