Ubuntu – USB-C to HDMI on Dell XPS 13 9360

dellhdmimultiple-monitorsusb-c

I just got a brand new Dell XPS 13 9360 and replaced Windows with Ubuntu 16.04.1.
Everything seems to work out of the box, except for few issues with video output to external monitor.

I bought two adapters from Aukey: USB-C to VGA and USB-C to HDMI.
The first one is working flawlessly, but HDMI one has few issues.

My usual monitor is a 24" FullHD Samsung TV monitor: when I connect it through the adapter, audio is working fine but it looks like that colors are rendered with a 16-bit palette, thus making it unusable (I tested the adapter on Windows before wiping it and it works correctly).

I tried on another Samsung TV monitor with the same issue.

I tried also on a Toshiba TV and it works correctly all the time, so there must be some issues specific to Samsung displays and Ubuntu when using USB-C adapters (the same display had no issues with my previous computer running Ubuntu).

The only workaround I could find is to turn off Samsung TV monitor, connect it to my XPS and then turn it on: in this case it works correctly. But after unplugging, if I want to plug it again I have to turn monitor off and on again.

For the moment I can live with this, but I was wondering if anyone had the same problem and found a definitive solution.

Best Answer

With the Kernel 4.13 this issue is fixed for me.

Downloading and Installing for X64

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13/linux-headers-4.13.0-041300_4.13.0-041300.201709031731_all.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13/linux-headers-4.13.0-041300-generic_4.13.0-041300.201709031731_amd64.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13/linux-image-4.13.0-041300-generic_4.13.0-041300.201709031731_amd64.deb

Installing the packages

sudo dpkg -i *.deb

Now just reboot and enjoy using your USB-C to HDMI adapter.

Reference : https://en.cristiantala.cl/fixing-ubuntu-usb-c-to-hdmi-dell-da200/

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