I’ve troubleshot the issues with Ubuntu and this adapter (see here: http://support.plugable.com/plugable/…)
First, an update for that post - the installer now accounts for “systemctl” so it does “work” without an additional configuration needed.
The problem I have is this:
sometimes the adapter doesn’t initialize. The blue light sometimes doesn’t come on after a cold boot, and other times it doesn’t come back on during a soft reboot. I can’t seem to find a pattern. What is the idea way to ensure that the USB 4K adapter always initializes?
when the blue light IS on, and with the drivers installed and running, I still don’t see the 4K monitor as an option. There are no errors in syslog, and systemctl shows the service as running.
Here’s the rest of the back-story: I started with the barebones operating system and after many reboots, the screen suddenly appeared (in my Displays setting screen). I don’t know what I did/didn’t do, but it worked. So, applying what I’ve learned on the Windows side, I next went to install the video card drivers (this is an ATI Radeon HD 5570)
Once installed, I re-installed the DisplayLink drivers. This is where I am now… the blue light is on, the installation went well, there are no errors in syslog, and systemctl shows the service as running. However, the 4K display is not available.
I realize this is an unsupported configuration at the moment (Ubuntu MATE 15.04), so I’m not looking for the answer on how to fix this, I’m just looking for more information on troubleshooting. There are no errors anywhere, but yet the screen isn’t “available” to the “Displays” settings screen, or the ATI Catalyst Control Center application. The 4K monitor is not available for some reason.
So I have 2 questions:
any tips or tricks to help the Plugable 4K adapter ALWAYS initialize. I’ve wasted many a reboot to have my main screen not-work, then I look under my desk to see the blue light off. Then, it takes some combination of cold and soft reboots to get the light to come back on.
any advice on how else to troubleshoot the 4K monitor not being available to Ubuntu, after the ATI OEM drivers were installed? I get no errors, the blue light is oni, but the screen is not available. Where else can I look for errors?