Re: [gentoo-user] clone root from HDD to SSD causes no video with NVIDIA driver

["J. Roeleveld" <joost@antarean.org>]

On Monday, June 15, 2020 9:56:39 AM CEST Raffaele BELARDI wrote:
>   *   From: Dale <rdalek1967@gmail.com>
>   *   Sent: Wednesday, June 10, 2020 08:02
>   *   To: gentoo-user@lists.gentoo.org<mailto:gentoo-user@lists.gentoo.org>
> *   Subject: Re: [gentoo-user] clone root from HDD to SSD causes no video
> with NVIDIA driver 
> 
>      *   Raffaele BELARDI wrote:
>      *   nomodeset did not change anything, but adding EFI_FB to the kernel
> finally got me a functional console.
 *   But if I startx from there I am
> back again to the same point, no X, no console switching with CTR-ALT-Fn, *
>   no crash in syslog, I have to SSH to get to a working shell. I'm not
> getting anywhere, I think I'll better install from stage3. 
> 
>   *   Odds are, if you start from stage3, you will get the same problem
> again unless you do something different.
 *   When I first stated using
> Gentoo, I didn't realize that one can restart a install pretty much
> anywhere in the install. *   Starting over doesn't get you anything
> different if you repeat the same steps. 
> Just to update: I tried all the hints received here with no luck. Since
> others on this list managed to get uefifb working with the NVIDIA driver I
> believe the problem could be my mobo/UEFI FW/GPU combination. I found some
> rather old posts ([1], [2]) supporting this hypothesis. For the moment I
> switched to nouveau.
 
> Thanks again to all,
> 
> raffaele
> 
> [1]
> https://forums.developer.nvidia.com/t/uefi-nvidia-vga-console-complaints/37
> 690
 [2]
> https://forums.developer.nvidia.com/t/nvidia-devs-any-eta-on-fbdev-console-> 
mode-setting-implementation/47043 

Personally, I would not expect this to be related to mainboard firmware/bios 
issues as I have not had any issues with efifb and nvidia-drivers on several 
systems.

What is your kernel-commandline?

Mine is really simple:
$ cat /proc/cmdline 
root=/dev/nvme0n1p3

I get the following in my dmesg for "efifb":
====
[    8.717047] efifb: probing for efifb
[    8.717061] efifb: framebuffer at 0xd1000000, using 3072k, total 3072k
[    8.717062] efifb: mode is 1024x768x32, linelength=4096, pages=1
[    8.717064] efifb: scrolling: redraw
[    8.717065] efifb: Truecolor: size=8:8:8:8, shift=24:16:8:0
[    8.719748] fb0: EFI VGA frame buffer device
====

Which is nowhere near the real resolution my screen can handle, but for 
emergencies, this is definitely sufficient.

For completeness, these are the entries for nvidia:
====
$ dmesg | grep -i nvidia
[   11.222893] nvidia: loading out-of-tree module taints kernel.
[   11.222908] nvidia: module license 'NVIDIA' taints kernel.
[   11.241368] nvidia-nvlink: Nvlink Core is being initialized, major device 
number 240
[   11.241687] nvidia 0000:01:00.0: vgaarb: changed VGA decodes: 
olddecodes=io+mem,decodes=none:owns=io+mem
[   11.283229] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  440.82  Wed Apr  
1 20:04:33 UTC 2020
[   11.287732] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for 
UNIX platforms  440.82  Wed Apr  1 19:41:29 UTC 2020
[   11.289189] [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
[   11.289191] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:01:00.0 on 
minor 0
[   11.861737] input: HDA NVidia HDMI/DP,pcm=3 as /devices/
pci0000:00/0000:00:03.0/0000:01:00.1/sound/card1/input28
[   11.862152] input: HDA NVidia HDMI/DP,pcm=7 as /devices/
pci0000:00/0000:00:03.0/0000:01:00.1/sound/card1/input29
[   11.979061] input: HDA NVidia HDMI/DP,pcm=8 as /devices/
pci0000:00/0000:00:03.0/0000:01:00.1/sound/card1/input30
[   11.979134] input: HDA NVidia HDMI/DP,pcm=9 as /devices/
pci0000:00/0000:00:03.0/0000:01:00.1/sound/card1/input31
====

On a side-note, anyone know how to prevent these sound-devices from appearing? 
I never use these on this system.

--
Joost