[Bug 216119] 087451f372bf76d breaks hibernation on amdgpu Radeon R9 390

[bugzilla-daemon at kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216119

--- Comment #11 from Alex Deucher (alexdeucher at gmail.com) ---
Does changing the the prefer_shadow hint help?  E.g., something like:

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index c2bc7db85d7e..4b6bd1a5804a 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3852,7 +3852,7 @@ static int amdgpu_dm_mode_config_init(struct
amdgpu_device *adev)
        adev_to_drm(adev)->mode_config.max_height = 16384;

        adev_to_drm(adev)->mode_config.preferred_depth = 24;
-       adev_to_drm(adev)->mode_config.prefer_shadow = 1;
+       adev_to_drm(adev)->mode_config.prefer_shadow = 0;
        /* indicates support for immediate flip */
        adev_to_drm(adev)->mode_config.async_page_flip = true;

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