Re: drm: simpledrm: fbdev emulation error with CONFIG_DRM_SIMPLEDRM enabled

[Amanoel Dawod]

On Tue, Aug 24, 2021, at 1:49 PM, Thomas Zimmermann wrote:
> Hi
> 
> Am 24.08.21 um 00:42 schrieb Amanoel Dawod:
> > Hi,
> > 
> > This started since 5.14-rc1. The following error appears in dmesg
> > (as of 5.14-rc7) when I build the kernel with CONFIG_DRM_SIMPLEDRM=m
> > 
> > [    3.252275] [drm] Initialized simpledrm 1.0.0 20200625 for simple-framebuffer.0 on minor 0
> > [    3.252298] simple-framebuffer simple-framebuffer.0: [drm] *ERROR* fbdev: Failed to setup generic emulation (ret=-22)
> 
> Thanks for trying out the driver and reporting back. I suspect that your 
> system uses a color format that is not yet supported. But let's see.
> 
> What's the platform you're on?
> 
> Simpledrm depends on the system framebuffer to be configured by the UEFI 
> BIOS or boot loader. What's the resolution and color format on your system?
> 
> Could you please boot the kernel with the command-line option 
> drm.debug=0x1ff and provide all dmesg output the is related to DRM?
> 
> Best regards
> Thomas
> 
> > 
> > thanks,
> > Amanoel
> > 
> 
> -- 
> Thomas Zimmermann
> Graphics Driver Developer
> SUSE Software Solutions Germany GmbH
> Maxfeldstr. 5, 90409 Nürnberg, Germany
> (HRB 36809, AG Nürnberg)
> Geschäftsführer: Felix Imendörffer
> 
> 
> Attachments:
> * OpenPGP_signature

Thanks for your reply.

This is on x86 platform. Specifically, Gigabyte B450i board with AMD Ryzen 3400G
(integrated graphics). Up to date bios version.

Resolution is 3840 x 2160.

Please find attached dmesg output related to DRM as requested.

-- 
thanks,
Amanoel
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