Nouveau - Apr 2020 - acr: failed to load firmware with Kernel 5.6. Kernel 5.5 works just fine.

Ben -- probably the ACR changes in 5.6 don't fall back nicely anymore
when there's no firmware? The load shouldn't be failed, just GR
disabled...

Zeno -- if you grab linux-firmware, it should be all better. Not sure
if you're missing it on purpose or by accident.

Cheers,

  -ilia

On Fri, Apr 3, 2020 at 11:07 AM Zeno Davatz <zdavatz at gmail.com>
wrote:
>
> Hi
>
> After installing Kernel 5.6 I am getting this error:
>
> [ please send a personal CC, thank you! ]
>
> Cannot run in framebuffer mode. Please specify busIDs for all
> framebuffer devices
>
> [ 0.757317] nouveau 0000:05:00.0: NVIDIA GP107 (137000a1)
> [ 0.869775] nouveau 0000:05:00.0: bios: version 86.07.42.00.4a
> [ 0.870157] nouveau 0000:05:00.0: acr: failed to load firmware
> [ 0.870256] nouveau 0000:05:00.0: acr: failed to load firmware
> [ 0.870356] nouveau 0000:05:00.0: acr ctor failed, -2
> [ 0.870455] nouveau: probe of 0000:05:00.0 failed with error -2
>
> This used to work just fine, with Version 5.5, Gentoo/Funtoo Linux.
>
> Very strange.
>
> With Kernel 5.5 everything was fine:
>
> this is what I get with Kernel 5.5
>
> ~/.backup> dmesg | grep nouveau
> [ 0.994622] nouveau 0000:05:00.0: NVIDIA GP107 (137000a1)
> [ 1.107079] nouveau 0000:05:00.0: bios: version 86.07.42.00.4a
> [ 1.107391] nouveau 0000:05:00.0: gr: failed to load firmware
"gr/sw_nonctx"
> [ 1.107494] nouveau 0000:05:00.0: gr: failed to load gr/sw_nonctx
> [ 1.107857] nouveau 0000:05:00.0: fb: 4096 MiB GDDR5
> [ 1.124158] nouveau 0000:05:00.0: DRM: VRAM: 4096 MiB
> [ 1.124268] nouveau 0000:05:00.0: DRM: GART: 536870912 MiB
> [ 1.124381] nouveau 0000:05:00.0: DRM: BIT table 'A' not found
> [ 1.124493] nouveau 0000:05:00.0: DRM: BIT table 'L' not found
> [ 1.124604] nouveau 0000:05:00.0: DRM: TMDS table version 2.0
> [ 1.124719] nouveau 0000:05:00.0: DRM: DCB version 4.1
> [ 1.124829] nouveau 0000:05:00.0: DRM: DCB outp 00: 01000f42 04620030
> [ 1.124941] nouveau 0000:05:00.0: DRM: DCB outp 01: 02011f62 00020010
> [ 1.125054] nouveau 0000:05:00.0: DRM: DCB outp 02: 02822f76 04600020
> [ 1.125166] nouveau 0000:05:00.0: DRM: DCB outp 03: 02022f72 00020020
> [ 1.125278] nouveau 0000:05:00.0: DRM: DCB outp 04: 04033f82 00020030
> [ 1.125390] nouveau 0000:05:00.0: DRM: DCB conn 00: 00001031
> [ 1.125501] nouveau 0000:05:00.0: DRM: DCB conn 01: 00010161
> [ 1.125612] nouveau 0000:05:00.0: DRM: DCB conn 02: 00020246
> [ 1.125723] nouveau 0000:05:00.0: DRM: DCB conn 03: 01000331
> [ 1.126100] nouveau 0000:05:00.0: DRM: failed to create kernel channel, -22
> [ 1.126364] nouveau 0000:05:00.0: DRM: MM: using COPY for buffer copies
> [ 1.481589] nouveau 0000:05:00.0: DRM: allocated 1680x1050 fb:
> 0x200000, bo (____ptrval____)
> [ 1.481807] fbcon: nouveaudrmfb (fb0) is primary device
> [ 1.672191] nouveau 0000:05:00.0: fb0: nouveaudrmfb frame buffer device
> [ 1.672362] [drm] Initialized nouveau 1.3.1 20120801 for 0000:05:00.0 on
minor 1
>
> Kernel Config is attached.
>
> Looking forward to any help or reply.
>
> I went back to version 5.5 of the Kernel (recompiled after git
> checkout v5.5) and all is fine again.
>
> Best
> Zeno

On Fri, Apr 3, 2020 at 6:59 PM Ilia Mirkin <imirkin at alum.mit.edu>
wrote:
>
> Ben -- probably the ACR changes in 5.6 don't fall back nicely anymore
> when there's no firmware? The load shouldn't be failed, just GR
> disabled...
>
> Zeno -- if you grab linux-firmware, it should be all better. Not sure
> if you're missing it on purpose or by accident.
Thank you, Ilia

I will try that on my Gentoo/Funtoo machine now. So far linux-firmware
was not needed with Kernel 5.5, so it was not installed on my machine.

[ please CC me ]

Best
Zeno

On Fri, Apr 3, 2020 at 1:21 PM Zeno Davatz <zdavatz at gmail.com>
wrote:
>
> On Fri, Apr 3, 2020 at 6:59 PM Ilia Mirkin <imirkin at alum.mit.edu>
wrote:
> >
> > Ben -- probably the ACR changes in 5.6 don't fall back nicely
anymore
> > when there's no firmware? The load shouldn't be failed, just
GR
> > disabled...
> >
> > Zeno -- if you grab linux-firmware, it should be all better. Not sure
> > if you're missing it on purpose or by accident.
>
> Thank you, Ilia
>
> I will try that on my Gentoo/Funtoo machine now. So far linux-firmware
> was not needed with Kernel 5.5, so it was not installed on my machine.
It was needed on 5.5 as well. It's just that it fell back gracefully
without firmware, and you didn't get any acceleration features.

Cheers,

  -ilia