[Bug 107623] (4.18.3)[drm:hwss_edp_wait_for_hpd_ready [amdgpu]] *ERROR* hwss_edp_wait_for_hpd_ready: wait timed out!

[Bug 107623] (4.18.3)[drm:hwss_edp_wait_for_hpd_ready [amdgpu]] *ERROR* hwss_edp_wait_for_hpd_ready: wait timed out!

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=107623

            Bug ID: 107623
           Summary: (4.18.3)[drm:hwss_edp_wait_for_hpd_ready [amdgpu]]
                    *ERROR* hwss_edp_wait_for_hpd_ready: wait timed out!
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: jian-hong@endlessm.com

Created attachment 141196
  --> https://bugs.freedesktop.org/attachment.cgi?id=141196&action=edit
"wait timed out!" in dmesg

We have an ASUS X570ZD laptop equipped with AMD Ryzen 7 2700U with Radeon Vega
Mobile Gfx and NVIDIA GeForce GTX 1050 Mobile.

We tried with Linux kernel 4.18.3.

After system resumes from suspend, there is a prompted picture for a short
time, then system goes no display for a long time.
After the long time, system turns off the display's backlight. User must
presses any key to have the login screen.

The resume process is not smooth and hits the error:
[drm:hwss_edp_wait_for_hpd_ready [amdgpu]] *ERROR* hwss_edp_wait_for_hpd_ready:
wait timed out!

We have the dmesg with amdgpu.dc_log=1 and drm.debug=6

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[Bug 107623] (4.18.3)[drm:hwss_edp_wait_for_hpd_ready [amdgpu]] *ERROR* hwss_edp_wait_for_hpd_ready: wait timed out!

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https://bugs.freedesktop.org/show_bug.cgi?id=107623

--- Comment #1 from jian-hong@endlessm.com ---
Created attachment 141197
  --> https://bugs.freedesktop.org/attachment.cgi?id=141197&action=edit
The resume process video

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[Bug 107623] (4.18.3)[drm:hwss_edp_wait_for_hpd_ready [amdgpu]] *ERROR* hwss_edp_wait_for_hpd_ready: wait timed out!

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https://bugs.freedesktop.org/show_bug.cgi?id=107623

--- Comment #2 from jian-hong@endlessm.com ---
It is nouveau with parameters runpm=0 and noaccel=1 as the driver for NVIDIA
GeForce GTX 1050 Mobile card.

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[Bug 107623] (4.18.3)[drm:hwss_edp_wait_for_hpd_ready [amdgpu]] *ERROR* hwss_edp_wait_for_hpd_ready: wait timed out!

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https://bugs.freedesktop.org/show_bug.cgi?id=107623

--- Comment #3 from jian-hong@endlessm.com ---
Created attachment 141207
  --> https://bugs.freedesktop.org/attachment.cgi?id=141207&action=edit
dmesg of boot into multi-user.target

If I boot system into "multi-user.target", then "systemctl suspend" and press
key to resume. This issue is not reproduced.

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[Bug 107623] (4.18.3)[drm:hwss_edp_wait_for_hpd_ready [amdgpu]] *ERROR* hwss_edp_wait_for_hpd_ready: wait timed out!

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https://bugs.freedesktop.org/show_bug.cgi?id=107623

--- Comment #4 from Harry Wentland <harry.wentland@amd.com> ---
Have you tried with nouveau disabled?

https://askubuntu.com/questions/841876/how-to-disable-nouveau-kernel-driver/951892#951892

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[Bug 107623] (4.18.3)[drm:hwss_edp_wait_for_hpd_ready [amdgpu]] *ERROR* hwss_edp_wait_for_hpd_ready: wait timed out!

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https://bugs.freedesktop.org/show_bug.cgi?id=107623

Daniel Drake <dan@reactivated.net> changed:

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

--- Comment #5 from Daniel Drake <dan@reactivated.net> ---
This issue was detected on 4.18.3 when using a somewhat reduced developer
config. When using our usual full distro kernel config (from Ubuntu), the issue
convincingly goes away.

Both Jian-Hong and I looked at the differences in the config and couldn't spot
anything obvious that would explain different behaviour. Trying to bisect good
and bad configs, for a while it looked like it might be CONFIG_NUMA_BALANCING=y
and CONFIG_NUMA_BALANCING_DEFAULT_ENABLED=y but we then disproved that in
further experiments. We didn't find which config option is responsible for the
different behaviour.

There's probably a bug here somewhere, but as it's working on our shipped
config I'll close this issue, as we need to focus our time on other issues on
this platform.

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[Bug 107623] (4.18.3)[drm:hwss_edp_wait_for_hpd_ready [amdgpu]] *ERROR* hwss_edp_wait_for_hpd_ready: wait timed out!

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https://bugs.freedesktop.org/show_bug.cgi?id=107623

taijian@posteo.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=110477

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