Fedora 39 and MST monitors

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1

I recently got a new computer, a BeeLink SER7 with a Radeon Rembrandt [Radeon 680M]. I have 3 Dell U24##H montors all with DP 1.2. I would like to get this setup but am not seeing much on how to dot hat. Is there additional documented config? Is there an application to install? Will this work with Gnome and Wayland?

2

I’m not sure I understand the question. It looks like your monitors support being “daisy chained” via their pass-through display port connections (one connection is for the data going into the monitor and the other connection is for the data going out of the monitor and on to the next). (BTW, the rule about connections labeled “in” or “out” on devices is that it is always from the perspective of the device. “in” means into the device with the “in” label and “out” means out of the device with the “out” label.)

There is no additional application to install for multi-stream transport (MST) support. That functionality is built into the amdgpu driver that comes with Linux.

3

Correct. i do have 3 Dell U24 inch monitors that support DisplayPort MST. However I can’t get it work using Fedora. Still having issues with Windows on my work laptop. Wasn’t sure if there was more configuration to be done…

4

I also have DisplayPort 1.2 enabled ON the monitor.

5

There are bandwidth limitations to be aware of. There are limits in what the protocol can handle. There are also limits in what the hardware (monitors/cables/video card) can handle. The whole system will only be as strong as its weakest link (so, e.g., if your cable cannot handle the bandwidth, nothing will work). You might try running things at lower resolutions or frequencies (or with fewer monitors in the chain) just to get it working and then try increasing the “load” gradually to see what it can handle.

Edit: If you are using USB-C for the first connection to the first monitor, make sure the USB port on the PC has the Display Port logo (not all USB-C ports will support the Display Port protocol).

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6

I’m using all DisplayPort or miniDP to Displayport to each monitor. I can’t even make it do more than one…

7

What type system is this and what hardware.
Please post the output of inxi -Fzxx as preformatted text (using the </> button on the toolbar) so we can see the hardware information.

8 
System:
  Kernel: 6.7.9-200.fc39.x86_64 arch: x86_64 bits: 64 compiler: gcc
    v: 2.40-14.fc39
  Desktop: GNOME v: 45.4 tk: GTK v: 3.24.41 wm: gnome-shell dm: GDM
    Distro: Fedora Linux 39 (Workstation Edition)
Machine:
  Type: Mini-pc System: AZW product: SER v: Version 1.0
    serial: <superuser required>
  Mobo: AZW model: SER v: Version 1.0 serial: <superuser required>
    part-nu: Default SKU UEFI: American Megatrends LLC. v: 113 date: 02/21/2023
Battery:
  Device-1: hidpp_battery_0 model: Logitech Wireless Touch Keyboard K400
    serial: <filter> charge: 100% (should be ignored) status: discharging
CPU:
  Info: 8-core model: AMD Ryzen 7 7735HS with Radeon Graphics bits: 64
    type: MT MCP arch: Zen 3+ rev: 1 cache: L1: 512 KiB L2: 4 MiB L3: 16 MiB
  Speed (MHz): avg: 1104 high: 3804 min/max: 400/4829 cores: 1: 2903 2: 400
    3: 3016 4: 400 5: 400 6: 400 7: 3804 8: 400 9: 3154 10: 400 11: 400 12: 400
    13: 400 14: 400 15: 400 16: 400 bogomips: 102201
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
Graphics:
  Device-1: AMD Rembrandt [Radeon 680M] driver: amdgpu v: kernel arch: RDNA-2
    pcie: speed: 16 GT/s lanes: 16 ports: active: DP-1 empty: DP-2, DP-3, DP-4,
    DP-5, DP-6, HDMI-A-1 bus-ID: 74:00.0 chip-ID: 1002:1681 temp: 40.0 C
  Display: wayland server: X.org v: 1.20.14 with: Xwayland v: 23.2.4
    compositor: gnome-shell driver: X: loaded: modesetting unloaded: fbdev,vesa
    dri: nouveau gpu: amdgpu display-ID: 0
  Monitor-1: DP-1 model: Dell U2414H res: 1920x1080 dpi: 93
    diag: 604mm (23.8")
  API: OpenGL v: 4.6 vendor: amd mesa v: 23.3.6 glx-v: 1.4 es-v: 3.2
    direct-render: yes renderer: AMD Radeon Graphics (radeonsi rembrandt LLVM
    17.0.6 DRM 3.57 6.7.9-200.fc39.x86_64) device-ID: 1002:1681
    display-ID: :0.0
  API: EGL Message: EGL data requires eglinfo. Check --recommends.
9

Kernel/driver update fixed the problem.

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