I tested this with the radeon driver (no cryptsetup): [ 1.524529] [drm] Initialized radeon 2.10.0 20080528 for 0000:01:00.0 on minor 0 and it works fine, no flickering.
I tested this with the radeon driver (no cryptsetup):
[ 1.524529] [drm] Initialized radeon 2.10.0 20080528 for 0000:01:00.0 on minor 0
and it works fine, no flickering.