So I figured something out. It seems 900 url and 900/1000 are on separate initial setting. I am no comp engineer, so I don’t know the exact term or how it works. Somehow the cold start for 900/1000 doesn’t register GPU even though external power shows available. 900 ulr however can be started without the gpu. So I use 900 ulr to set the panel state to gpu. This for some reasons made 900/1000 starts on gpu. And for all the subsequent RESTART, I have no issue cold starting 900/1000. However if I end the session and begin a new session with cold start, 900/1000 won’t work again. Not sure if this makes sense. So now I keep the panel state at gpu on, and 900/1000 works for now.