(/usr/bin/Xephyr -title "$TITLE" -terminate -screen $SCREENSIZE -dpi $DPI -displayfd 5 5>&1 2>/dev/null) | while read D; do export DISPLAY=:$D ... done This works in F16 and gets the correct Display FD, In Rawhide this is returning 0 all the time.
*** This bug has been marked as a duplicate of bug 824594 ***