Prof. Rachel Thorn 🍉🇺🇦🏳️‍⚧️🏳️Apr 14
I can't get my computer to recognize my second #display. I'm running #Ubuntu 24.04.4 LTS on a Minisforum UM890 Pro with an AMD Ryzen 9 8945HS and Radeon™ 780M Graphics × 16. There are 64GB of memory. The second display is a EVICIV 13.3" EVC-1301 that always worked fine with my Mac Mini and my MacBook. It's connected with a cord that is #Displayport on the PC side and #HDMI on the display side. I also tried it with USB4 to USB4. [EDIT] Problem solved!
Show threadProf. Rachel Thorn 🍉🇺🇦🏳️‍⚧️🏳️Apr 14

I couldn't get the DP-HDMI cord to work on either display, but I was able to get the second display working when I connected with a USB4-HDMI cord.

What the heck is is the DP port on my computer for if it won't connect to a display!?

Show threadRay McCarthyApr 14

@RachelThornSub
I've only one USB-C cord that works between the netbook (Linux Mint) USB-C DP port and the screen. No others work.
I bought a USB cable tester. Turns out that all of the other USB-C <-> USB-C cables (even ones sold as USB-3.x) are all variations of USB 2.0 wiring. My USB 3.x USB-A -> USB-C cables are all USB 3.0 but no use for DP.

Two different USB-C DP HDMI adaptors do seem to work with everything, but they can be a problem.
Also not all actual full size DP to HDMI work.

Show threadRay McCarthy
@RachelThornSub
USB-C is a mess. So many options, so many partial cables, so little documentation on what modes a particular port supports from the manufacturer. Real tech specs seem to not exist on most tablets, phones and laptops.
Apr 14 at 2:11pmWeb
Show threadRay McCarthyApr 14

@RachelThornSub
Also I can't leave the USB-C DP HDMI adaptor plugged in on the larger laptop or the battery goes flat. The power can't be turned off for that port, even in BIOS, on that Lenovo.

It's a mess. Each newer piece of gear is more annoying.

I have Netbook (ex-ChromeBook), Laptop & workstation all with Linux Mint & two screens. Though mostly 1 on the netbook. Big laptop 2x external QHD via HDMI & USB-C DP HDMI adaptor..