That's late enough for acceleration to be fully initialized, but still early enough to set pScreen->canDoBGNoneRoot.
37874a4 Defer initial drmmode_copy_fb call until root window creation
src/drmmode_display.c | 6 ------
src/radeon.h | 3 +++
src/radeon_kms.c | 40 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 43 insertions(+), 6 deletions(-)
Upstream: cgit.freedesktop.org