Hello everybody, This is a revised translation of a posting to the German Debian mailing list. Unfortunately nobody there was able to help me with my problem but I hope that on this list with a much wider list of readers somebody might have encountered my problem and found a solution for it.
I have two NUC 13, one for work and one for private use. Both are running Debian 12 Bookworm with Gnome 43 and Wayland/Weston. My monitor is a Acer Predator XB273KGP, which has four connectors, two Displayport 1.4 and two HDMI 2.0. The Display port can do 120hz when connected via DP. One of the NUCs is connected with an USB-C-to-DP-Cable and the other one via HDMI 2.0 with only 60 hz. The other ports are used by other computers. My problem is that once the monitor is deactivated – either by manually switching it off or by DPMS - the only way to get a picture again is either to reboot the NUC or detach and re-attach the USB cable. The monitor simply complains that there is "No Signal" This runs counter to my intended usage. I want to enable power saving during the day and reactivate the NUC with a keypress when I want to check my emails or search Google. Also, the NUC is connected to my video projector via HDMI and I want to turn the computer display off when watching movies on the big screen. An active computer is both an unwelcome distraction and a waste of energy. Do you have any suggestions on how to fix this issue? I suspect that this is not the fault of my monitor – I have a windows pc for gaming and it awakes from suspend with a keypress without any problems. It is connected to another DP Port via a high quality DP cable. I do not even have a workaround until a long-term solution is found. At the moment I completely shutdown the NUC after use and start it when I want to use it. Luckily this takes only a few seconds – my NUCs are fast, especially with a Samsung 990 Pro – but I am still looking for a better way to handle this. Yours sincerely Stefan
