I seemed to have solved my problem by accident! For those that may be coming across the same issue, if you close the lid on your laptop, the connected external display then becomes active. We can therefore conclude that there can be only one active display during pre-boot at a time; which, in my opinion, should definitely have the option to change within the firmware/bios settings. Is there any way a feature request can be made?
Hi everyone, I have an Inspiron 7306 2in1 that is hooked up to an external monitor via USB-C. I have the Thunderbolt and USB-C boot options enabled in the bios/firmware options. There is no video signal present until the laptop boots into the operating system. I am not sure if this is a bios/firmware issue or if I am missing a setting somewhere, of which it seems I already enabled all available options for USB-C/Thunderbolt functionality during pre-boot. Any ideas?
Inspiron 7306 - No USB-C External Monitor Pre-Boot Signal