Zhichao,<br /><br />That sounds like a bug in you graphics console devices.&nbsp; If they are already initialized (by pei or other platform code) they should not start in mode -1.&nbsp;&nbsp;<br />For bug 1412, can we make sure all Tianocore edk2 drivers support "flicker free" and don't unncecessarly re-initialize.&nbsp; Do you see other issues in edk2 code?&nbsp;&nbsp;<br /><br />Thanks<br />Sean