Comment # 36 on bug 105018 from Harry Wentland

The kernel BUG should be fixed since 4.17 by this commit

commit 20d4ac659c76034586a3ab79489b0940631a65de
Author: Leo (Sunpeng) Li <sunpeng.li@amd.com>
Date:   Tue May 29 09:51:51 2018 -0400

    drm/amd/display: Fix BUG_ON during CRTC atomic check update

    For cases where the CRTC is inactive (DPMS off), where a modeset is not
    required, yet the CRTC is still in the atomic state, we should not
    attempt to update anything on it.

    Previously, we were relying on the modereset_required() helper to check
    the above condition. However, the function returns false immediately if
    a modeset is not required, ignoring the CRTC's enable/active state
    flags. The correct way to filter is by looking at these flags instead.

    Fixes: e277adc5a06c "drm/amd/display: Hookup color management functions"
    Bugzilla: https://bugs.freedesktop.org/106194

    Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com>
    Reviewed-by: Harry Wentland <harry.wentland@amd.com>
    Tested-by: Michel Dänzer <michel.daenzer@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>


I'll mark this as resolved but please reopen if it still reproduces.