u/Glass_Wrap_4191

so i have a laptop connected to my external monitor using usb c to dp cable, when i used it does connect. but after a while i turn off my laptop and try to turn it back on, it doesnt detect my monitor. i had to turn it on and off while plugging in and unplug the cable multiple time, whats wrong with it? is there any way i can just turn it on as usual like when im using hdmi cable?