[REGRESSION] drm/amd/dc: Add dc display driver (v2)

Joseph Salisbury joseph.salisbury at canonical.com
Mon Apr 30 15:14:50 UTC 2018

Hi Harry,

A kernel bug report was opened against Ubuntu [0].  After a kernel
bisect, it was found the following commit introduced the bug:

commit 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c
Author: Harry Wentland <harry.wentland at amd.com>
Date:   Tue Sep 12 15:58:20 2017 -0400

    drm/amd/dc: Add dc display driver (v2)

The regression was introduced as of v4.15-rc1 and still exists in
current mainline.  The commit does not need to be reverted to resolve
the bug.  Disabling the CONFIG_DRM_AMD_DC_PRE_VEGA option makes the bug
go away.
I was hoping to get your feedback, since you are the patch author.  Do
you think gathering any additional data will help diagnose this issue?



[0] http://pad.lv/1761751

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