Sticking with screen. Installed kmscon, manually ran kmscon on a single virtual console, switched back and forth from kmscon to X and back three times. On the

Sticking with screen. Installed kmscon, manually ran kmscon on a single virtual console, switched back and forth from kmscon to X and back three times. On the third time, X shutdown like it detected a conflict (it looked like a crash, but the logs showed an orderly shutdown of X). Current setup with auto spawned screen instances is stable.