I have an Acer XV340CKP monitor connected via Display Port to my GPU. I also have a old LG W2253TQ that I use as a secondary display. It only has a DVI and VGA port. I have a DVI-DVI cable together with a DVI-Display Port converter to connect to my GPU, which is an Asus RX6900XT. I am running Nobara 38.
I have observed that if I were to have my Acer monitor powered when I switch on my desktop, all the monitor buttons do not respond. None of the menu buttons, not even the power button responds. When I switch off the desktop, the monitor stays on. The only way to power it down is to unplug the power cable.
However, if I were to only have the LG monitor powered when I switch on my desktop, all the buttons on the Acer monitor works.
I believe everything was working previously in Nobara 37. I think this issue probably started happening in the recent month or two.
Is this even possible, where the graphics card sends a malformed signal to the monitor and prevents the buttons from working?
Very interesting. The Asus monitor is probably only 2 years old. It does work fine standalone with a spare laptop of mine that is running Windows 10 though.
Have you tried to replicate this behavior in Windows? Try it with a spare drive, see if you get the same irrational thing happening in Windows. If it happens, yeah, it’s a hardware problem 😉… most probably bad caps. Bad batch maybe, even though it’s only 2 years old, who knows.
I did not try replicating this behavior with a Windows install on my desktop. I did however perform a fresh install of Fedora 39 and that appeared to have fixed the issue, which is good news.
Well, it’s not a hardware problem in that case 😉. Good thing you fixed it 👍.