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Enable onboard hdmi port for drawing tablet?

Post Date: 2020-07-13
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rimmsel View Drop Down
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Posts: 4 		  Quote rimmsel Quote  Post ReplyReply bullet Topic: Enable onboard hdmi port for drawing tablet?
    Posted: 13 Jul 2020 at 1:52pm
Hey there, I just got my new Lynx 3 in the mail today and have spent all day setting it up and getting things connected and personalized. This is the first desktop computer I've ever owned: I've always had gaming laptops, so I'm excited!

I'm trying to get my drawing tablet, which connects via HDMI and USB, to work. It is meant to mirror the computer's image output on the tablet screen. I plugged it into the only other HDMI port available- on the motherboard. Windows recognized the tablet and installed precursor drivers to run it, but when I turn the tablet on it lets me know there is no input source.

From the manual I understand that the onboard ports are disabled by default, since the computer comes with its own dedicated graphics card. I'd like to enable the onboard HDMI port to be able to plug the tablet in for drawing, but not use it for display purposes otherwise. With google's help, I searched through the BIOS and found where the setting SHOULD have been to enable the second monitor output, but there wasn't anything there.

I'm not sure where to go from here. How do I enable the onboard HDMI output if I can't find the setting under the BIOS's Advanced/System Agent Configuration/Graphics Configuration menu? Do I first need to download a driver for the motherboard's video output or something?
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hoserator View Drop Down
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Posts: 7966 		  Quote hoserator Quote  Post ReplyReply bullet Posted: 14 Jul 2020 at 12:05am
Congratulations and welcome. Awesome
Once you install a dedicated gpu, the onboard video outputs are disbled by default. Don't know that you can avoid this with the card in. Doesn't the gpu have an HDMI output? You need sound?
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Cretae View Drop Down
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Posts: 7331 		  Quote Cretae Quote  Post ReplyReply bullet Posted: 14 Jul 2020 at 4:18am
Seems to me the computer's "image output" could only come from the GPU. There would at least be time lag between the two, and I can't figure how the CPU would handle that. Could you not simply use a splitter for two cables?

Edited by Cretae - 14 Jul 2020 at 4:29am
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rimmsel View Drop Down
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Posts: 4 		  Quote rimmsel Quote  Post ReplyReply bullet Posted: 14 Jul 2020 at 6:56am
Thanks for the responses!

The GPU HDMI output is currently in use running to a KVM switch that provides the monitor (as well as keyboard, mouse, and wireless headset dongle.) I saw the open HDMI port on the back and thought "well that would be perfect! I don't have to add more cables and things!"

Based on what you're saying, it seems like it's very possible that I don't need to use the onboard HDMI at all. I hadn't considered plugging in a splitter to the GPU! To answer hoserator, no I don't need sound to the tablet.

Especially if there would be lag created if I plugged the tablet into the CPU, it sounds like my answer is to get an HDMI splitter and run it from the GPU alongside the kvm input? Display lag while drawing would be non-negotiable unfortunately, so it looks like this is probably the way to go if the onboard HDMI would provide lag no matter what.
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Posts: 4 		  Quote rimmsel Quote  Post ReplyReply bullet Posted: 14 Jul 2020 at 12:27pm
Howdy again!

Alright, so I went out and got an HDMI splitter (Rocketfish 2 HDMI output box) and hooked it up to the computer's GPU HDMI output. I then connected the KVM's monitor HDMI plug to the output 1 slot on the splitter, and attached my drawing tablet's HDMI cable to output 2.

Switched the whole thing on and the monitor has no input source.

Took the tablet off the connection and just had the computer running straight into the splitter's input, and then the KVM switch monitor cord as the only output, and still no signal.

I'm concerned that this means an HDMI splitter and KVM switch won't be compatible in this setup, since introducing an HDMI splitter into the mix causes the screen not to display anything.
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rimmsel View Drop Down
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Posts: 4 		  Quote rimmsel Quote  Post ReplyReply bullet Posted: 14 Jul 2020 at 12:34pm
"Hey Rimmsel, did you make sure to plug the HDMI splitter into the wall once the inputs/outputs were connected?"

No :)

It works. Thanks for your help!
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hoserator View Drop Down
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Posts: 7966 		  Quote hoserator Quote  Post ReplyReply bullet Posted: 14 Jul 2020 at 2:15pm
Glad you got it going. Sometimes it is just a simple solution. Smile
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Cretae View Drop Down
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Posts: 7331 		  Quote Cretae Quote  Post ReplyReply bullet Posted: 15 Jul 2020 at 4:44am
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