SUMMARY After update I am forced to use singlemonitor because if I try to login (or connect when already logged in) the second monitor, I get a black screen. I am fortunately able to go to another tty session. Do note that this started happening when I updated to the latest version. STEPS TO REPRODUCE 1. Connect two monitors to (AMD?) gpu 2. Log in into your account 3. Observe the black screen OBSERVED RESULT Black screen on both screens then it cuts connection to both displays. SOFTWARE/OS VERSIONS Operating System: Fedora Linux 41 KDE Plasma Version: 6.3.0 KDE Frameworks Version: 6.10.0 Qt Version: 6.8.2 Kernel Version: 6.12.11-200.fc41.x86_64 (64-bit) Graphics Platform: Wayland Processors: 12 × Intel® Core™ i7-8700 CPU @ 3.20GHz Memory: 15.5 GiB of RAM Graphics Processor: AMD Radeon RX 480 Graphics ADDITIONAL INFORMATION Monitor1: 1440p, 144Hz, 100% scale Monitor2: 1080p, 144Hz, 100% scale both have adaptive sync disabled, color profile set to "built-in", color accuracy: "prefer color accuracy".
Set color accuracy to prefer efficiency on both of your monitors and try again, i had this issue with prefer color accuracy with an AMD GPU.
(In reply to Greeniac from comment #1) > Set color accuracy to prefer efficiency on both of your monitors and try > again, i had this issue with prefer color accuracy with an AMD GPU. This seems to have fixed my issue.
*** This bug has been marked as a duplicate of bug 499789 ***