Re: If only HDMI-port ist connected + ethernet + mouse+keyboard ... display stays dark, keyboard and mouse are NOT powered and nothing happens ... after 5-10 Minutes the withe led above the audio-ports of the mainboard is activated, after another half minute or so mouse and keyboard are activated and then your hdmi monitor has no issue. It is your 8940 bios taking extra long time to pass every firmware on POST when it detects a monitor connected to hdmi port. Have you tried fast boot option in bios?  Default is thorough boot. Default: Thorough.
Hello, Got a Dell 8940 XPS without Graphics Card for a bargain. So far so good. A great compact machine, but the HDMI port on the mainboard is not active on boot. It takes 5-10 minutes after pressing the power button for the PC to realize there is a monitor connected. If connected via DisplayPort, everything works fine as it should. If only HDMI port is connected + ethernet + mouse + keyboard, display stays dark, keyboard and mouse are NOT powered and nothing happens. After 5-10 minutes the white led above the audio ports of the mainboard is activated, after another half minute or so mouse and keyboard are activated and then there is the output over HDMI.  What I tried so far = Install the newest & all available updatesSet the primary graphics to Intel instead of "auto"Reset BIOS to factory defaultInstall Windows fresh on a spare SSD of mine without any dell drivers or apps Nothing helps. The issue is still the same. Appears like there must be a BIOS setting I don't know of or BIOS is bugged somehow. Does someone have any suggestions? Thanks upfront!
XPS 8940, onboard HDMI activated only after 5-10 minutes