Bug 107701

Summary: Asus X570ZD amdgpu display flicker at brightness level 1
Product: DRI Reporter: Daniel Drake <dan>
Component: DRM/AMDgpuAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact:
Severity: normal    
Priority: medium CC: harry.wentland, sunpeng.li
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Asus X570ZD dmesg with debug params none

Description Daniel Drake 2018-08-28 05:42:18 UTC 
On the Asus X570VD laptop with AMD Ryzen 7 with Radeon Vega Mobile Gfx, if you use the brightness keys to reduce the screen brightness to the minimum level under GNOME, the display flickers disturbingly.

This is reproducible under Ubuntu 18.04 with all updates applied (Linux 4.15).
It's also reproducible with AMDGPU-PRO All-Open drivers installed on top.
It's also reproducible under Linux 4.18.5.

It's hard to capture on camera, but you can get some appreciation of the issue in this video:
https://youtu.be/tCoA45TJlAk

When the screen is in this state, the /sys/class/backlight/brightness file has value 1. If I manually adjust to value 2, the flicker goes away.
Comment 1 Daniel Drake 2018-08-28 05:47:27 UTC 
Created attachment 141305 [details]
Asus X570ZD dmesg with debug params

Typo above - product name is Asus X570ZD.
Here is the dmesg log
Comment 2 Martin Peres 2019-11-19 08:49:50 UTC 
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