Raven: freeze at 'modprobe amdgpu' in early console with android-x86

[Felix Kuehling]

I've seen hangs on a Raven AM4 system after the Ubuntu upgrade to kernel 
5.3. I am able to work around it by disabling stutter mode with the 
module parameter amdgpu.ppfeaturemask=0xfffdbfff. If that doesn't help, 
you could also try disabling GFXOFF with amdgpu.ppfeaturemask=0xfffd3fff.

Regards,
   Felix

On 2020-01-26 11:13, Mauro Rossi wrote:
> Hello,
> I am having problem to load amdgpu module with Athlon 200GE, on a
> motherboard MSI B450M-A Pro Max with latest BIOS and a DVI-D monitor.
>
> The same HW setup  boots Ubuntu 19.10 Gnome Desktop Environment with
> APU HW acceleration without any issue.
>
> When issueing the command 'modprobe amdgpu' in early console the
> screen just freezes, but I don't see any [drm] amdgpu output on the
> screen and the modesetting has clearly failed.
>
> I have tried with kernel 5.3, the same as the one used in Ubuntu
> 19.10, and replicated the %AMD% kernel config options extracted from
> Ubuntu.
> I have the same issue also with kernel 5.5rc7 and up to date linux-firmware.
>
> In case you have experienced or know about similar issues,
> could you please provide some info/suggestion for me to try to
> overcome the problem?
>
> Are there some implicit additional kernel config options required besides
> CONFIG_DRM_AMDGPU=m, CONFIG_AMD_DC=y, CONFIG_AMD_DC_DCN1_0=y,
>
> or some undocumented module dependencies, which are mandatory for the
> Raven APUs correct detection?
>
> Thanks for any info
>
> Mauro Rossi
> android-x86 team volunteer
> _______________________________________________
> amd-gfx mailing list
> amd-gfx at lists.freedesktop.org
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.freedesktop.org%2Fmailman%2Flistinfo%2Famd-gfx&data=02%7C01%7Cfelix.kuehling%40amd.com%7Cf3b361eac69f4878af4208d7a27aab62%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637156520408128896&sdata=Rc20y%2BFoh06v%2FzY6TdM896B2KZiL%2BCq%2FMAJqkY30M6Q%3D&reserved=0