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unknownzerx / lguf-brightness

Adjust brightness for LG UltraFine 4K display (cross platform)
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Failed to open the device (open_device failed) #6

Closed ambroselittle closed 6 years ago

ambroselittle commented 6 years ago

Hi, when I run this, I get: "Failed to open the device (open_device failed)"

I check my USB Composite Devices. I have two.

1:

USB\VID_0C76&PID_161E&REV_0100 USB\VID_0C76&PID_161E

2:

USB\VID_046D&PID_085E&REV_0317 USB\VID_046D&PID_085E

This is plugged into the ThunderboltEx card on my ASUS PRIME X299-DELUXE. The display is driven from their DisplayPort link.

Any way to get this going? Thanks in advance!

unknownzerx commented 6 years ago

The special USB device for adjusting brightness is not presenting, whose VID=043E, PID=9A40...

Have you connected the TB Header on the ThunderboltEx card to the mobo? Could the TB port used as a USB (2.0) port?

ambroselittle commented 6 years ago

I do have it connected to the header. I am not sure how to test/answer your question about USB 2. Sorry. Thanks for the help.

csujedihy commented 6 years ago

@ambroselittle, In some certain motherboard, you need to insert your ThunderboltEx card in the last slot (PCIE-4X?). Or you can't find your thunderbolt devices.

ambroselittle commented 6 years ago

@csujedihy, yup, it is. It is running my LG Ultrafine 5K fine, FWIW. I just can't change the settings. :)

csujedihy commented 6 years ago

As long as you find 0x43e, 0x9a40 device, you can use another tool listed below to adjust brightness.

https://github.com/csujedihy/LG-Ultrafine-Brightness

ambroselittle commented 6 years ago

So you got me thinking, and I searched around a bit and found that the mobo does not enable TB by default. I went into BIOS and set the following:

Enable Thunderbolt

I saved and booted, and Windows saw the new devices. Now I can use the bulit in camera and speakers! Yay! AND this tool works, too! w00t. Thanks for the help, y'all! Closing.

BTW, @csujedihy, I did try yours, and it said unable to set feature report and didn't change the brightness. FWIW.

csujedihy commented 6 years ago

@ambroselittle You should try plug in one more usb device on your monitor and see if your camera still works or not. On my monitor, if I plug in any usb device, the camera does not work.

csujedihy commented 6 years ago

It's weird and this tool lguf-brightness actually should work but not. We share basically same code but different API for USB. On my computer, lguf-brightness does not work but mine works fine. I can't figure out the reason.

@ambroselittle Are you running x64 Windows? My tool only works on x64.

ambroselittle commented 6 years ago

Yup. x64.

Did your camera come back after unplugging the other thing?

csujedihy commented 6 years ago

After restart, it will come back.

Hochiss commented 4 years ago

As long as you find 0x43e, 0x9a40 device, you can use another tool listed below to adjust brightness.

https://github.com/csujedihy/LG-Ultrafine-Brightness

HID\VID_043E&PID_9A40 is HID Ambient Light Sensor as indicated by Wx, but cannot find correct driver.

would you @csujedihy mind sharing a built binary for Wx?