"Antonino A. Daplas" [off-list ref] wrote:

Unfortunately, this may cause some userland breakage.  X should work.
 However, some apps may have been developed that uses the FB_BLANK constants
 (DirectFB?).  In these cases, they'll get a deeper blank level instead, so it
 probably won't affect them significantly.  A follow up patch that hides the 
 FB_BLANK constants may be worthwhile.

Would prefer to avoid any userland breakage.  Is this followup patch
happening?