Comment # 3 on bug 104639 from Christian König

Does your kernel also have the following patch?

commit f4c809914a7c3e4a59cf543da6c2a15d0f75ee38
Author: Christian König <christian.koenig@amd.com>
Date:   Mon Oct 9 14:34:13 2017 +0200

    drm/ttm: don't use compound pages for now

    We need to figure out first how to correctly map them into the CPU page
tables.

    bug: https://bugs.freedesktop.org/show_bug.cgi?id=103138
    Signed-off-by: Christian König <christian.koenig@amd.com>
    Acked-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>