(In reply to Martin Wilck from comment #69) > (In reply to Gary Ching-Pang Lin from comment #68) > > > I believe the black screen is caused by > > MokManager due to the residual MOK variables, e.g. MokAuth. > > How would that come to pass? Do you think Mokmanager crashes? Maybe. If MokAuth exists without MokNew, MokManager treats it as a reset request, and shim will also load MokManager.