[Bug 108096] [amd-staging-drm-next] SDDM screen corruption (not useable) with RX580, amdgpu, dc=1 (of course), regression

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=108096

            Bug ID: 108096
           Summary: [amd-staging-drm-next] SDDM screen corruption (not
                    useable) with RX580, amdgpu, dc=1 (of course),
                    regression
           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: Dieter@nuetzel-hh.de

Created attachment 141786
  --> https://bugs.freedesktop.org/attachment.cgi?id=141786&action=edit
SDDM corruption 4.18.0-rc1

amd-staging-drm-next (since 21/22 August 2018)
didn't work any longer with my nice RX580

Latest working amd-staging-drm-next kernel was from 16th August 2018
#5024f8dfe478 (my testing for Huang Rui ray.huang at amd.com)
https://lists.freedesktop.org/archives/amd-gfx/2018-August/025332.html

On 22th August I got first SDDM corruption (see attchament) and
[   14.322826] [drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed to initialize
parser !
in dmesg with amd-staging-drm-next 4.18.0-rc1.
(see attchament) dmesg-4.18.0-rc1-1.g7262353-default+.log

Later (23th August) I saw SDDM corruption and
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed to initialize parser !
plus
[    3.487757] RIP: 0010:amdgpu_bo_gpu_offset+0x56/0x90 [amdgpu]
(see attchament) dmesg-4.18.0-rc1-1.g7262353-default+.log3


After Alex's upgrade to amd-staging-drm-next 4.19.0-rc1
I got SDDM corruption (see attchament)
and
[   14.439424] [drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed to initialize
parser !
(see attchament) dmesg-4.19.0-rc1-1.g7262353-default+.log-25.10

First 'bisect' attempt went nuts  'cause the big merge with Linus tree didn't
resolve.
Can't find my former amd-staging-drm-next tag (#5024f8dfe478, see above) any
longer ;-(

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