Electronics > Projects, Designs, and Technical Stuff

How laptop makers implement the power button over USB-C?

(1/2) > >>

Warhawk:
Guys, I am not a big fan of USB-C. Nevertheless, I have two laptops with USB-C that I use with the docking station and external screens. I do not need the internal screen when docked and for this reason, I like to keep the lid closed. This allows me to place the laptop of the table and have more working area on my desk. I can theoretically wake up or enable the laptop using the button found on the docking station. Unfortunately each manufacturer (HP, Lenovo, Dell) uses a different implementation for the wake-up functionality. Only the same-brand  docking station enables the laptop. (HP dock enables only HPs, Lenovo dock only Thinkpads, etc.).

Does anyone know how laptop makers implement this feature? I assume that it is either a sequence, specific voltage, or the combination of both, on data signals. I am hoping that I can maybe create a small board that one puts between the dock and the laptop that enables all based on the config.
Believe or not, I am not the only one who has this problem. I've already met couple people looking for same.
Thanks for any tips.
 

I wanted a rude username:
Many computers wake on key press (either any key or a specific "power button" key on some keyboards) or even mouse button click, so a device that emulates a HID might work. Easy to test out, too, with just a keyboard connected to the powered USB port as blueskull mentioned.

Warhawk:
Thanks guys but this requires the computer in sleep. Wake over USB does not enable the laptop when disabled.

Jeroen3:
No, wake over usb by keyboard can work in S5. Same as wake on lan.

Warhawk:

--- Quote from: Jeroen3 on July 03, 2020, 04:31:55 pm ---No, wake over usb by keyboard can work in S5. Same as wake on lan.

--- End quote ---
So any tip how to make a USB device that powers up the laptop when disabled? Because I am seriously doubting this is possible for laptops. There might be some desktop PC motherboards with this functionality but this is not the case of laptops. Otherwise, why would Lenovo, HP and Dell used different approach?
 

Navigation

[0] Message Index

[#] Next page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod