[Bug 112265] Drm: mgag200. Video adapter issue with 5.4.0-rc3 ; no graphics

[Bug 112265] Drm: mgag200. Video adapter issue with 5.4.0-rc3 ; no graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=112265

            Bug ID: 112265
           Summary: Drm: mgag200. Video adapter issue with 5.4.0-rc3 ; no
                    graphics
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: not set
         Component: DRM/other
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: John.p.donnelly@oracle.com

bisect took to me to  this change that certainly reflects the behavior I am
seeing :

 5.1.0-rc5


commit 81da87f63a1edebcf8cbb811d387e353d9f89c7a (refs/bisect/bad)
Author: Thomas Zimmermann <tzimmermann@suse.de>
Date:   Tue May 21 13:08:29 2019 +0200

   drm: Replace drm_gem_vram_push_to_system() with kunmap + unpin

   The push-to-system function forces a buffer out of video RAM. This decision
   should rather be made by the memory manager. By replacing the function with
   calls to the kunmap and unpin functions, the buffer's memory becomes
available,
   but the buffer remains in VRAM until it's evicted by a pin operation.

   This patch replaces the remaining instances of drm_gem_vram_push_to_system()
   in ast and mgag200, and removes the function from DRM.


My 1st impression is we need a method  that restores the previous behavior that
pushes the content to the device .    



I found this issue using 

gnome-desktop3-3.28.2-1.el8.x86_64

If there is a more specific. RPM  I can look at for guidance I will .

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[Bug 112265] Drm: mgag200. Video adapter issue with 5.4.0-rc3 ; no graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=112265

John.p.donnelly@oracle.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |John.p.donnelly@oracle.com

--- Comment #1 from John.p.donnelly@oracle.com ---
Created attachment 145949
  --> https://bugs.freedesktop.org/attachment.cgi?id=145949&action=edit
dmesg and message file on bi-sected kernel

Starting gnome 

See messages for 

  " starting gnome "

  and 

"  Stopping gnome "

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[Bug 112265] Drm: mgag200. Video adapter issue with 5.4.0-rc3 ; no graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=112265

--- Comment #2 from John.p.donnelly@oracle.com ---
debugfs content :


With gnome running 


 # for f in `find . -type f ` ; do 
> echo "$f :  `cat $f` " 
> done
./VGA-1/edid_override :   
./VGA-1/force :  unspecified 
./internal_clients :   
./framebuffer :  framebuffer[35]:
        allocated by = Xorg
        refcount=2
        format=XR24 little-endian (0x34325258)
        modifier=0x0
        size=1024x768
        layers:
                size[0]=1024x768
                pitch[0]=4096
                offset[0]=0
                obj[0]:(null)
framebuffer[34]:
        allocated by = [fbcon]
        refcount=1
        format=XR24 little-endian (0x34325258)
        modifier=0xb7e2c74500000010
        size=1024x768
        layers:
                size[0]=1024x768
                pitch[0]=4096
                offset[0]=4294967295
                obj[0]:(null) 
./gem_names :    name     size handles refcount 
./clients :               command   pid dev master a   uid      magic
      systemd-logind  1563   0   y    y     0          0 
./name :  mgag200 dev=0000:3d:00.0 unique=0000:3d:00.0

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[Bug 112265] Drm: mgag200. Video adapter issue with 5.4.0-rc3 ; no graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=112265

--- Comment #3 from John.p.donnelly@oracle.com ---
Created attachment 145950
  --> https://bugs.freedesktop.org/attachment.cgi?id=145950&action=edit
Running startx on the console

This likely doesn't help much 
On a 4.18 kernel  ; when I do "startx"  on the console   ; it eventually runs
gnone.

 On the bad kernel ;   I just see  x11 noise ;  then nothing .

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[Bug 112265] Drm: mgag200. Video adapter issue with 5.4.0-rc3 ; no graphics

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https://bugs.freedesktop.org/show_bug.cgi?id=112265

Thomas Zimmermann <tzimmermann@suse.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|dri-devel@lists.freedesktop |tzimmermann@suse.de
                   |.org                        |

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