[Bug 204725] black screen

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=204725

--- Comment #46 from Dmitri Seletski (drjoms at gmail.com) ---
(In reply to Mike Lothian from comment #37)
> I think you need CONFIG_FB_SIMPLE & CONFIG_FB_BOOT_VESA_SUPPORT=y configured
> 
> This is what I have in my .config for a Ryzen card
> 
> CONFIG_DRM_KMS_FB_HELPER=y
> CONFIG_FB_CMDLINE=y
> CONFIG_FB_NOTIFY=y
> CONFIG_FB_CFB_FILLRECT=y
> CONFIG_FB_CFB_COPYAREA=y
> CONFIG_FB_CFB_IMAGEBLIT=y
> CONFIG_FB_SYS_FILLRECT=y
> CONFIG_FB_SYS_COPYAREA=y
> CONFIG_FB_SYS_IMAGEBLIT=y
> CONFIG_FB_SYS_FOPS=y
> CONFIG_FB_DEFERRED_IO=y
> CONFIG_FB_MODE_HELPERS=y
> CONFIG_FB_EFI=y
> CONFIG_FB_SIMPLE=y
> 
> And I'm sure I had the above issue when playing with these options before

I am a little confused.
CONFIG_DRM_KMS_FB_HELPER

I have this in my 'make menuconfig'

  │ Symbol: DRM_KMS_FB_HELPER [=n]                                             
                                                                               
                                               │  
  │ Type  : bool                                                               
                                                                               
                                               │  
  │   Defined at drivers/gpu/drm/Kconfig:75                                    
                                                                               
                                               │  
  │   Depends on: HAS_IOMEM [=y] && DRM_KMS_HELPER [=m] 


I checked every option under 'drivers/gpu/drm/'

I don't see one option with description of 'CONFIG_DRM_KMS_FB_HELPER'. Is this
normal?


I only have, under "Device Drivers > Graphics support > Direct Rendering
Manager (XFree86 4.1.0 and higher DRI support)":


--- Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)            
                                             │ │  
  │ │                                                      [ ]   DRM DP AUX
Interface                                                                      
                            │ │  
  │ │                                                      [ ]   Insert extra
checks and debug info into the DRM range managers                              
                          │ │  
  │ │                                                      < >   kselftests for
DRM                                                                            
                        │ │  
  │ │                                                      [ ]   Enable legacy
fbdev support for your modesetting driver                                      
                         │ │  
  │ │                                                      [*]   Allow to
specify an EDID data set instead of probing for it.


I supposed I can just add CONFIG_DRM_KMS_FB_HELPER=y line to .config and
compile it this way, but why is it disabled and not in config file by default?
Is it even significant?

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