[Solved] USB-C hub : HDMI output doesn't work

MrKebi · 2018-01-10 00:57:02

Hello and happy new year dear Archers.

I am posting here because I have some lack of functions with my new USB-C hub. Recently I bought a new Xiaomi Notebook Pro and an USB-C hub with USB3, ethernet, cards reader, HDMI and USB-C charger input.

The ethernet and USB are working well, the USB-C input for charging too, but the HDMI function of the hub doesn't work on Archlinux (I checked, it works out of the box in Windows 10). I will maybe use a second (with the HDMI output of the Notebook, working well) and a third display (with the HDMI output of the hub if possible). I searched on Google about the lsusb ids but I didn't find anything about this problem, I even couldn't find which id is the HDMI output. Do you have some clues ?

lsusb #without the hub, everything working well except the Elan fingerprint reader, but it is a known problem
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 04f3:0c1a Elan Microelectronics Corp.
Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 003: ID 04f2:b59a Chicony Electronics Co., Ltd
Bus 001 Device 002: ID 8087:0a2b Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
lsusb #with the hub
Bus 002 Device 007: ID 0bda:8153 Realtek Semiconductor Corp. RTL8153 Gigabit Ethernet Adapter
Bus 002 Device 006: ID 0bda:0411 Realtek Semiconductor Corp.
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 04f3:0c1a Elan Microelectronics Corp.
Bus 001 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 003: ID 04f2:b59a Chicony Electronics Co., Ltd
Bus 001 Device 002: ID 8087:0a2b Intel Corp.
Bus 001 Device 012: ID 1908:0226 GEMBIRD #I think it is the card reader of the hub
Bus 001 Device 010: ID 0bda:5411 Realtek Semiconductor Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
uname -a
Linux Archlinux-NotebookPro 4.14.12-1-ARCH #1 SMP PREEMPT Fri Jan 5 18:19:34 UTC 2018 x86_64 GNU/Linux

Best regards.

Last edited by MrKebi (2018-01-11 01:00:22)

seth · 2018-01-10 08:49:21

the output will more likely appear in "xrandr" - did you google the hubs brand alongside linux compatibility?

MrKebi · 2018-01-10 15:40:36

seth wrote:

the output will more likely appear in "xrandr" - did you google the hubs brand alongside linux compatibility?

No I couldn't because I didn't find the chipset used by this hub ... Yeah I know it is quite stupid

I will check the xrandr output this night with the hub plugged.

ngoonee · 2018-01-10 21:14:26

In my own experience, USB-C to HDMI is heavily adapter dependent, as there are multiple ways for it to work. The fact it works on windows is a good sign though, but it may be through a method which isn't implemented in Linux.

MrKebi · 2018-01-11 00:34:47

Yeah previously I bought a USB/VGA adaptater, I read it was very dependent of the chipset used for Linux utilisation, I suppose it is the same deal here.

Here is the output of xrandr, with and without the hub plugged (it is exactly the same) :

xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
   1920x1080     60.03*+  48.00  
   1400x1050     59.98  
   1280x1024     60.02  
   1280x960      60.00  
   1024x768      60.04    60.00  
   960x720       60.00  
   928x696       60.05  
   896x672       60.01  
   800x600       60.00    60.32    56.25  
   700x525       59.98  
   640x512       60.02  
   640x480       60.00    59.94  
   512x384       60.00  
   400x300       60.32    56.34  
   320x240       60.05  
HDMI-1 disconnected (normal left inverted right x axis y axis) #I suppose it is the HDMI output of my Notebook ??
DP-1 disconnected (normal left inverted right x axis y axis) # ??
HDMI-2 disconnected (normal left inverted right x axis y axis) # Could be the HDMI output of my hub, but it is visible too without the hub plugged ?

ERATUM : Ok it appears now in the Plasma Screen panel, just I had to check the "Enabled" box and it works ! I don't know why, maybe because I plugged the AC-in directly in the hub ?
Just, the max resolution of the screen isn't correct (1920x1080 instead of 1680x1050) but I observed the same problem if I plugged the HDMI directly with the Notebook. I changed it and it works fine.

Here is the xrandr output with the USB-C hub and the HDMI plugged on it.

xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
   1920x1080     60.03*+  48.00  
   1400x1050     59.98  
   1280x1024     60.02  
   1280x960      60.00  
   1024x768      60.04    60.00  
   960x720       60.00  
   928x696       60.05  
   896x672       60.01  
   800x600       60.00    60.32    56.25  
   700x525       59.98  
   640x512       60.02  
   640x480       60.00    59.94  
   512x384       60.00  
   400x300       60.32    56.34  
   320x240       60.05  
HDMI-1 disconnected (normal left inverted right x axis y axis) # it is my HDMI output of the Notebook
DP-1 connected (normal left inverted right x axis y axis) # the HDMI output of the plug, don't understand why it is saw as a DP port, but it works :)
   1920x1080     60.00 +  59.94  
   1680x1050     59.88  
   1280x1024     75.02    60.02  
   1280x960      60.00  
   1152x864      75.00  
   1280x720      60.00    59.94  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   640x480       75.00    72.81    66.67    60.00    59.94  
   720x400       70.08  
HDMI-2 disconnected (normal left inverted right x axis y axis) # So I don't really know what is this output, maybe a virtual one ?

I don't understand how, but I am passing this thread "Solved". Thanks for your help !

Last edited by MrKebi (2018-01-11 00:59:49)

Arch Linux

#1 2018-01-10 00:57:02

[Solved] USB-C hub : HDMI output doesn't work

#2 2018-01-10 08:49:21

Re: [Solved] USB-C hub : HDMI output doesn't work

#3 2018-01-10 15:40:36

Re: [Solved] USB-C hub : HDMI output doesn't work

#4 2018-01-10 21:14:26

Re: [Solved] USB-C hub : HDMI output doesn't work

#5 2018-01-11 00:34:47

Re: [Solved] USB-C hub : HDMI output doesn't work

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