[Bug 99275] Kernel 4.9: amdgpu regression; gui flickers; amd radeon rx 460

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99275

            Bug ID: 99275
           Summary: Kernel 4.9: amdgpu regression; gui flickers; amd
                    radeon rx 460
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: tuxuser at quantentunnel.de
                CC: tiwai at suse.de

Created attachment 128754
  --> https://bugs.freedesktop.org/attachment.cgi?id=128754&action=edit
hwinfo

System: openSuse Leap 42.2,
kernel from download.opensuse.org/repositories/Kernel:/stable/standard/
4.9.0-4.g1af4b0f
Mesa from download.opensuse.org/repositories/X11:/XOrg/openSUSE_Leap_42.2/

graphics adapter: amd radeon rx 460
cpu: i5-6402p

desktop: kde5 (from 42.2-oss/update)

Problem: Address-drop-down in firefox flickers.

Steps to reproduce:

start firefox
enter address (example: www.heise.de)
enter an other address
address drop down starts to flicker.

Perhaps problem shows up only when virtual desktop has been changed before
firefox was started. (I use cube animation for virtual desktop change.)

Problem also occurs with tumbleweed live system.

There is no problem with kernel 4.8.x (4.8.14)

I've also reported this bug at
https://bugzilla.suse.com/show_bug.cgi?id=1017938

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