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Cannot say Wayland works smoothly on my triple-monitor setup. One of the monitors sometimes stops working randomly, and wakes up to display Plymouth screen when

Cannot say Wayland works smoothly on my triple-monitor setup. One of the monitors sometimes stops working randomly, and wakes up to display Plymouth screen when I reboot the thing. Dell Precision 7520 with an AMD GPU. The degree of flakiness is different depending on whether you're on Plasma or GNOME, but it's there nonetheless.

ludocode 6y ago
I'm guessing that's an AMD GPU thing and not a Wayland thing. I run a triple-monitor setup with an AMD GPU on X.org and I have a similar problem: every once in a while when I boot my PC one of the monitors just doesn't come to life. Restarting X usually fixes it.
- WesolyKubeczek 6y ago
  But the bootscreens work! X11 withmodesetting ddx works! Moreover: when I pass through the dGPU to a virtualized macOS, all monitors I plug in just work!
horsawlarway 6y ago
I mean, my data point of one isn't all that helpful if you're having issues, but triple monitors do indeed work on my end. I switch between a station that has a 4k display next to a standard 1920x1080 display as well as my laptop display (3200x1800) and my home setup with the laptop and 2 4k displays. I had an issue on the 4k displays when I attempted to run two displays and a usb hub on a single thunderbolt line, but that wasn't Wayland, that was me being dumb: The thunderbolt protocol only support 40Gb/s and each monitor uses 20Gb/s and the hub eats another 10Gb/s. If the hub got detected last, it dropped to usb 2, if one of the monitors came online last, it would drop to 30hz refresh rate. Frankly - I was a little floored when I realized that I was the one being dumb and the system was mostly still just making things work. Just for shits and giggles I booted up an x-session after to see what it does. The answer is lots of black screen.
phkahler 6y ago
>> Cannot say Wayland works smoothly on my triple-monitor setup. How does X work on that setup?
- WesolyKubeczek 6y ago
  Very smoothly.
- Spivak 6y ago
  Well until you need mixed scaling and then it completely falls down.
  - WesolyKubeczek 6y ago
    That’s why I have triple-4k monitor setup. Also good for the eyes. Mixed scaling? Is that that thing when you open chrome and it’s blurry on your hidpi monitor?
javier2 6y ago
To be fair, triple monitors barely work on my macbook

ludocode 6y ago

I'm guessing that's an AMD GPU thing and not a Wayland thing. I run a triple-monitor setup with an AMD GPU on X.org and I have a similar problem: every once in a while when I boot my PC one of the monitors just doesn't come to life. Restarting X usually fixes it.

WesolyKubeczek 6y ago
But the bootscreens work! X11 withmodesetting ddx works! Moreover: when I pass through the dGPU to a virtualized macOS, all monitors I plug in just work!

horsawlarway 6y ago

I mean, my data point of one isn't all that helpful if you're having issues, but triple monitors do indeed work on my end. I switch between a station that has a 4k display next to a standard 1920x1080 display as well as my laptop display (3200x1800) and my home setup with the laptop and 2 4k displays. I had an issue on the 4k displays when I attempted to run two displays and a usb hub on a single thunderbolt line, but that wasn't Wayland, that was me being dumb: The thunderbolt protocol only support 40Gb/s and each monitor uses 20Gb/s and the hub eats another 10Gb/s. If the hub got detected last, it dropped to usb 2, if one of the monitors came online last, it would drop to 30hz refresh rate. Frankly - I was a little floored when I realized that I was the one being dumb and the system was mostly still just making things work. Just for shits and giggles I booted up an x-session after to see what it does. The answer is lots of black screen.

phkahler 6y ago

>> Cannot say Wayland works smoothly on my triple-monitor setup. How does X work on that setup?

WesolyKubeczek 6y ago
Very smoothly.
Spivak 6y ago
Well until you need mixed scaling and then it completely falls down.
- WesolyKubeczek 6y ago
  That’s why I have triple-4k monitor setup. Also good for the eyes. Mixed scaling? Is that that thing when you open chrome and it’s blurry on your hidpi monitor?

javier2 6y ago

To be fair, triple monitors barely work on my macbook