Prof. Rachel Thorn πŸ‰πŸ‡ΊπŸ‡¦πŸ³οΈβ€βš§οΈπŸ³οΈ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 Radeonβ„’ 780M Graphics Γ— 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!
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@RachelThornSub Hrmm...a few things I can think of to try.

First I would probably start with running "xrandr --listmonitors" to see if the second monitor is even visible to the system. If it's detected but just not enabled, you might just need to enable it. The command would be something like "xrandr --output HDMI-1 --auto" assuming the second monitor shows up as "HDMI-1" in the first command run (replace that with whatever your system says the name of the second display is).

Let me know if that works for you...there are a few other things to be tried if not.

Show threadπ™½πš˜πšŠπš‘ π™Όπš˜πš—πš˜πšœπš™πšŠπšŒπšŽπšApr 14
@RachelThornSub I'm pulling those commands from my very faulty brain...so might need to preface those with "sudo"...I honestly can't remember.
Show threadProf. Rachel Thorn πŸ‰πŸ‡ΊπŸ‡¦πŸ³οΈβ€βš§οΈπŸ³οΈApr 14
@monkeyninja (Didn't need sudo)
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@RachelThornSub OK cool, couldn't remember honestly. So if it's not visible we're likely looking at a driver issue. Try running "sudo ubuntu-drivers autoinstall" to see if we get lucky and it can auto-install the missing drivers to get the second monitor working.
Apr 14 at 1:05pmWeb
Show threadProf. Rachel Thorn πŸ‰πŸ‡ΊπŸ‡¦πŸ³οΈβ€βš§οΈπŸ³οΈApr 14
@monkeyninja Here's a strange thing. The EVICIV works when I use it as my MAIN display with HDMI to HDMI.
Show threadProf. Rachel Thorn πŸ‰πŸ‡ΊπŸ‡¦πŸ³οΈβ€βš§οΈπŸ³οΈApr 14
@monkeyninja And when I use the Displayport to HDMI cord to try to make my original display a second display, once again the computer doesn't recognize it.
Show threadProf. Rachel Thorn πŸ‰πŸ‡ΊπŸ‡¦πŸ³οΈβ€βš§οΈπŸ³οΈApr 14
@monkeyninja Problem solved (!?)
I couldn't get the DP-HDMI cord to work for either display, but a USB4-HDMI cord worked with the EVICIV display!
Thank you for your help!
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@RachelThornSub Fascinating...I have no idea why that would make the difference...maybe it was just an order of operations issue with bus addressing or some such. How odd! Well either way, I'm glad you found a solution that worked!
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@RachelThornSub I poked around a bit and I saw a few similar posts from folks who said they had DisplayPort to HDMI issues on 22.04 and 24.04 but not earlier versions so I'm wondering if a kernel update caused problems for folks. I didn't see *any* fixes though that didn't involve changing the cable setup so it seems like no one else has figured out DP-HDMI on a recent Ubuntu install either.
Show threadProf. Rachel Thorn πŸ‰πŸ‡ΊπŸ‡¦πŸ³οΈβ€βš§οΈπŸ³οΈApr 14
@monkeyninja
Oh my. I think my only choice for that little portable display are HDMI and USB-C. I wonder if a DP-to-USB-C cable would work.