[Bug 107493] Screen goes blank while loading drm driver

[Bug 107493] Screen goes blank while loading drm driver

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=107493

            Bug ID: 107493
           Summary: Screen goes blank while loading drm driver
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: esebaro@gmail.com

I have a PC with:
MB: Asrock AM1B-ITX
CPU: AMD Kabini Athlon 5350 APU
iGPU: Radeon HD 8400 / R3 Series
Displays: DVI Asus, HDMI Samsung

Kernels: 4.12/4.14/4.15/4.16/4.17
Drivers: radeon, amdgpu, amdgpu-dc

Booting in UEFI mode, EFIFB/SimpleFB

When the drm driver is loaded on system boot or when is loaded manually the
screen goes blank. The screen content reappears after the driver has been
loaded.
I assume switching from efifb/simblefb to radeon/amdgpudrmfb causes this.

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[Bug 107493] Screen goes blank while loading drm driver

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https://bugs.freedesktop.org/show_bug.cgi?id=107493

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Please attach your xorg log and dmesg output.  What display connectors are on
your system and which are you using?  Are you using DVI and HDMI at the same
time?

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[Bug 107493] Screen goes blank while loading drm driver

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https://bugs.freedesktop.org/show_bug.cgi?id=107493

--- Comment #2 from Sebastian Luncan <esebaro@gmail.com> ---
Created attachment 140984
  --> https://bugs.freedesktop.org/attachment.cgi?id=140984&action=edit
xorg log

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[Bug 107493] Screen goes blank while loading drm driver

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https://bugs.freedesktop.org/show_bug.cgi?id=107493

--- Comment #3 from Sebastian Luncan <esebaro@gmail.com> ---
Created attachment 140985
  --> https://bugs.freedesktop.org/attachment.cgi?id=140985&action=edit
dmesg

The mainboard has two video ports, DVI and HDMI. I use the DVI port. I can test
the HDMI port too if that helps.

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[Bug 107493] Screen goes blank while loading drm driver

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https://bugs.freedesktop.org/show_bug.cgi?id=107493

--- Comment #4 from Michel Dänzer <michel@daenzer.net> ---
(In reply to Sebastian Luncan from comment #0)
> When the drm driver is loaded on system boot or when is loaded manually the
> screen goes blank. The screen content reappears after the driver has been
> loaded.

So this report is about the screen temporarily blanking while the driver
initializes? If so, that's not really a bug, getting rid of that would be an
enhancement.

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[Bug 107493] Screen goes blank while loading drm driver

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https://bugs.freedesktop.org/show_bug.cgi?id=107493

--- Comment #5 from Sebastian Luncan <esebaro@gmail.com> ---
(In reply to Michel Dänzer from comment #4)
> So this report is about the screen temporarily blanking while the driver
> initializes? If so, that's not really a bug, getting rid of that would be an
> enhancement.

Yes.
I didn't know that's how AMD drivers load.
Starting with 4.14 there's also a screen wide artifact when loading the driver
so I thought the screen blanking is a bug.

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[Bug 107493] Screen goes blank while loading drm driver

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https://bugs.freedesktop.org/show_bug.cgi?id=107493

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement
           Priority|medium                      |low

--- Comment #6 from Michel Dänzer <michel@daenzer.net> ---
(In reply to Sebastian Luncan from comment #5)
> Starting with 4.14 there's also a screen wide artifact when loading the
> driver [...]

Those artifacts should be fixed as of 4.18.

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[Bug 107493] Screen goes blank while loading drm driver

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https://bugs.freedesktop.org/show_bug.cgi?id=107493

--- Comment #7 from Sebastian Luncan <esebaro@gmail.com> ---
(In reply to Michel Dänzer from comment #6)
> Those artifacts should be fixed as of 4.18.
OK, thanks.

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[Bug 107493] Screen goes blank while loading drm driver

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https://bugs.freedesktop.org/show_bug.cgi?id=107493

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

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

--- Comment #8 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/472.

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