[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

            Bug ID: 107823
           Summary: [amdgpu/displayport] Blackscreen on native resolution
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: jan.burgmeier@unicon-software.com

Created attachment 141442
  --> https://bugs.freedesktop.org/attachment.cgi?id=141442&action=edit
dmesg with drm.debug=0x1e log_buf_len=1M

Hi,

there seems to be some monitor/graphics card combination which lead to a black
screen.
In my case it is the native (1920x1080) resolution of a NEC EA223WM monitor and
a [AMD/ATI] Carrizo (rev 88). Setting any other mode than the native one via
xrandr turns the monitor on. Setting it back to the native one results in a
black screen.
It seems unrelated to XOrg as there is also a black screen on the terminal and
during boot.
I do not see any errors in dmesg or XOrg log

The error does not occur with module parameter dc=0

Environment:
Kernel: 4.19.0-rc2 (git master)
Mesa: 18.1.6
XOrg: 1.20.1
amdgpu-ddx: 18.0.99 (git master)

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #1 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
Created attachment 141443
  --> https://bugs.freedesktop.org/attachment.cgi?id=141443&action=edit
lspci -vv output

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #2 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
Created attachment 141444
  --> https://bugs.freedesktop.org/attachment.cgi?id=141444&action=edit
/proc/cpuinfo

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #3 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
Created attachment 141445
  --> https://bugs.freedesktop.org/attachment.cgi?id=141445&action=edit
xrandr output

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #4 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
Created attachment 141446
  --> https://bugs.freedesktop.org/attachment.cgi?id=141446&action=edit
dmesg after setting mode to 1400x1050

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #5 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
Created attachment 141447
  --> https://bugs.freedesktop.org/attachment.cgi?id=141447&action=edit
dmesg after setting mode to auto

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #6 from Drexler <roby_heart@yahoo.com> ---
Hi,
was wondering if you can share the EDID of this NEC EA223WM monitor?

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #7 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
Created attachment 142042
  --> https://bugs.freedesktop.org/attachment.cgi?id=142042&action=edit
edid info from sysfs

Here is the edid info extracted from sysfs:
/sys/devices/pci0000:00/0000:00:01.0/drm/card0/card0-DP-1/edid

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #8 from raxondmc@gmail.com ---
@Jan:

I was wondering can you see the issue with their staging branch? 

Here is what I can recommend you to try :

https://cgit.freedesktop.org/~agd5f/linux/log/?h=amd-staging-drm-next


If possible for you to try, give it a shot. I can help, but dont have same
monitor as you do.

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #9 from raxondmc@gmail.com ---
@Jan:

Can you see if you get the black screen if you set amdgpu.dc=0 in the grub boot
line?

I am interested to help and learn something new, if you do not mind :)

I dont have the monitor or else i would have tried it here!

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #10 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
As mentioned in the description with dc=0 the error does not occur.

I've tested amd-staging-drm-next from current HEAD
(efb7936df2efe1434f0d5e72ae9d256a4388965a) and the error still occurs. With
this kernel I see following error in dmesg:

[drm:construct [amdgpu]] *ERROR* construct: Invalid Connector ObjectID from
Adapter Service for connector index:2! type 0 expected 3

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #11 from raxondmc@gmail.com ---
Your correct, sorry i missed the dc=0 comment. 

Seems like you have Carrizo->DP2DVI(PASSIVE)->NEC monitor? 

Do you if other monitors show it as well? 

I will try with my 580x and a dongle and can let you know. (albeit different
monitor).

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #12 from raxondmc@gmail.com ---
I've tried with a monitor I have with my 580x :

Here is the modeline your monitor has: 

[ 49.626518] [drm:drm_mode_debug_printmodeline [drm]] Modeline 64:"1680x1050"
60 146250 1680 1784 1960 2240 1050 1053 1059 1089 0x48 0x6


Here is mine: 

<div> [drm:drm_mode_debug_printmodeline [drm]] Modeline 68:"1680x1050" 60
146250 1680 1784 1960 2240 1050 1053 1059 1089 0x40 0x6

Now, the diff seems to be second last print on the lines. That said, my monitor
is not 1680x1050 native, but it supports this mode. 

Clocks seems to be the same, now i am wondering if it's the panel (NEC) in your
case that is picky or just Carrizo PLL's are not encoding at that modulated
clock.

I'll try to find a CZ and try it.

Cheers.

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #13 from raxondmc@gmail.com ---
I've used your edid file and emulated it in my carrizo HW, I cannot see the
issue.

I am thinking the panel on that NEC monitor may be not liking it.

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #14 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
Thanks for your effort so far.

I have two monitors connected so I get a picture, but the error also occurs if
only the NEC monitor is connected.

The NEC monitor is connected directly with DP and the second monitor is
connected with a DP->DVI Adapter.

I think it has somehow to do with the NEC as other monitors work fine.

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #15 from Drexler <roby_heart@yahoo.com> ---
Hi Jan, 
i have exact same panel and tried it out, with thinpro 7, but unable to see the
problem. The panel's native resolution is 1680x1050 @60 which is selected by
default. I then set using xrandr, another resolution, 1024x768, then set it
back to 1680x1050, and it seems to work on my side. Wanted to check if my
procedure is correct? attached is a video and setup pictures.

thanks

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #16 from Drexler <roby_heart@yahoo.com> ---
Created attachment 142478
  --> https://bugs.freedesktop.org/attachment.cgi?id=142478&action=edit
setup pic 1

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #17 from Drexler <roby_heart@yahoo.com> ---
Created attachment 142479
  --> https://bugs.freedesktop.org/attachment.cgi?id=142479&action=edit
setup video

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #18 from Drexler <roby_heart@yahoo.com> ---
Hi Jan,
was wondering if you were able to review the video i uploaded?
thanks again

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #19 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
Hi,

the video looks good. I don't know why you do not see the error. I am unable to
get a picture after boot because the says "Frequency out of range".

At the start of next week I will retest and give more information.

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #20 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
Created attachment 142644
  --> https://bugs.freedesktop.org/attachment.cgi?id=142644&action=edit
Change resolution for reproduction

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[Bug 107823] [amdgpu/displayport] Blackscreen on native resolution

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #21 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
Created attachment 142645
  --> https://bugs.freedesktop.org/attachment.cgi?id=142645&action=edit
System information

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

--- Comment #22 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
Let me know if you need more information

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--- Comment #23 from Drexler <roby_heart@yahoo.com> ---
Hi Jan,
thanks for the video. 
just like to ask, were you also able to try on using another DP cable? short
and or thicker DP cable?
Also, would just like to ask if you observe the issue on Ubuntu 18.10? I tested
my setup, and also seems to be able to pass. 
unfortunately, the OSD of the panel doesnt actually say what the firmware
version is so I couldnt compare against your panel. 
Do you have other EA223WM panels? do they also fail?

thanks for your feedback

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--- Comment #24 from Jan Burgmeier <jan.burgmeier@unicon-software.com> ---
I tested with a shorter DP cable but the error still occurs. I don't think it
is a cable/hardware problem as the same hardware with kernel parameter dc=0
works just fine.

I tried a Ubuntu 18.04 live stick but it didn't boot. Tomorrow I can try a
18.10 livestick.

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https://bugs.freedesktop.org/show_bug.cgi?id=107823

Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED

--- Comment #25 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/505.

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