Usb-c to HDMI adapter shows as billboard device - no display

user11445033

10/20/23, 2:30 AM

I've tried a few different adapters to get display output from my usb c port. None have worked on ubuntu. This is what I get (or similar) from lsusb for every hdmi-usbc adapter I buy:

Bus 001 Device 010: ID 0bda:2172 Realtek Semiconductor Corp. BillBoard Device

From what I can gather 'Billboard' just means that switching to alternate mode failed because of some issue.

In monitor settings, I only see the built-in monitor. Similarly, I installed ARandR no other outputs appear.

So,

Adapter

I have tried a few adapters. The one I'm trying currently is 'plugable usb-c to hdmi adapter'. It is stated to support linux and any usb-c port that supports DisplayPort Alternate Mode. OK.

Laptop

I have the ASUS C523N. It is stated to support driving a display from usb-c, but nothing more specific: spec sheet.

This is a chromebook. When I boot into chrome-os, the display works through the same usb-c port.

Other details

Kernel: 5.15.0-50-generic

jasper@crbook1:~$ cat /boot/config-$(uname -r) | grep TYPEC_DP
CONFIG_TYPEC_DP_ALTMODE=m

Ubuntu: 22.04.1 LTS

Dmesg:

[80603.451223] usb 1-2: new full-speed USB device number 8 using xhci_hcd
[80603.610532] usb 1-2: not running at top speed; connect to a high speed hub
[80603.628180] usb 1-2: New USB device found, idVendor=0bda, idProduct=2172, bcdDevice= 1.00
[80603.628202] usb 1-2: New USB device strings: Mfr=17, Product=18, SerialNumber=19
[80603.628210] usb 1-2: Product: BillBoard Device
[80603.628217] usb 1-2: Manufacturer: Realtek
[80603.628223] usb 1-2: SerialNumber: 00000000000000000

Related issue

The only issue that I can find matching is this: USB-C to HDMI not working on Dell XPS 13 9370

The solution there was just to try another adapter. I'm on my 3rd purchase and I can't always get returns. This one explicitly says it supports linux. I will try to contact their support and report back here. I really can't keep buying cables and hoping that it works. I'm looking to at least get a handle on what the problem is here. Any help is appreciated.

1130

1 + 0

display

usb

monitor

hdmi

asus

Score:0

Ubuntu

Sofyan

4/16/24, 6:39 AM

Almost same problem to me, but in Windows, i found article that explain something, maybe be can give a bit explanation

"If you want to use a USB-C cable to connect two devices so one can output DisplayPort to a display, make sure that both support USB Power Delivery. Otherwise you’ll need to use an adapter to split/convert the USB-C plug into a DisplayPort connector."

Refers from "https://stronglybranched.io/2020/01/usb-c-device-wont-output-to-a-usb-c-monitor"

+ 1

David

4/16/24, 7:40 AM

This does not really answer the question. If you have a different question, you can ask it by clicking [Ask Question](https://askubuntu.com/questions/ask). To get notified when this question gets new answers, you can [follow this question](https://meta.stackexchange.com/q/345661). Once you have enough [reputation](https://askubuntu.com/help/whats-reputation), you can also [add a bounty](https://askubuntu.com/help/privileges/set-bounties) to draw more attention to this question. - [From Review](/review/late-answers/1292890)

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Usb-c to HDMI adapter shows as billboard device - no display

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.