[Bug 99851] [drm:.r600_ring_test [radeon]] *ERROR* radeon: ring 0 test failed (scratch(0x8504)=0xCAFEDEAD)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99851

--- Comment #20 from Alex Deucher <alexdeucher at gmail.com> ---
(In reply to intermediadc at hotmail.com from comment #19)
> Hi Alex,
> can you check this my post? can be a kms issue this and  cafedead too?
> 

I'm not sure what you are asking.  The kernel driver loads first and
initializes the hardware.  If the ring test fails, the driver disables the 3D
engine which in term disables acceleration for the rest of the stack.

> on my quad g5 i have the RadeonHD 7750 as first 16x pcie 
> 
> 0000:0a:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
> [AMD/ATI] Cape Verde PRO [Radeon HD 7750/8740 / R7 250E]
> 0000:0a:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Cape
> Verde/Pitcairn HDMI Audio [Radeon HD 7700/7800 Series]
> 
> and the open firmware nouveau as the 3rd pcie 
> 0001:06:00.0 VGA compatible controller: NVIDIA Corporation G70GL [Quadro FX
> 4500] (rev a1)
> 
> 
> On my kernel 4.10.8 i dont have a nouveau module installed .
> this is my kenrel append: 
> nouveau.modeset=0 video=nouveaufb:off radeon.modeset=1 video=radeonfb:off
> pci=realloc radeon.dpm=1 pci=realloc video=offb:ff radeon.dpm=1 nosplash 
> 
> 
> lsmod show  drm_kms_helper 2 amdgpu,radeon 
> 
> i removed the /etc/X11/xorg.conf 
> 
> If i made an xorg -configure , 
> xorg produce a nouveau configuration xorg.conf on busid 6:0:0 
> starting X made a black screen with cursor blinking 
> so 
> i removed the xorg driver for nouveau 
> xorg -configure 
> and xorg produce a modesetting xorg.conf on busid 6:0:0 
> starting X made a black screen without blinking cursor 
> 
> so 
> i removed the /usr/bin/xorg/modules/driver/modesetting 
> and xorg -configure dont find any screen and not made any xorg.conf.new
> 
> i made my xorg.conf 
> with radeon busid 10:0:0 
> i have a glitched graphic ... 


Does physically removing the nvidia card help?  Note also that I think X uses
decimal for busid directives while lspci uses hex.

> 
> i removed glemour module on xorg i have radeon working but without
> acceleration...

glamor is required for acceleration.

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