My computer is AMD Ryzen 9 5900X, Radeon PRO WX 3100. I have two monitors connected. The primary connected using Display Port, and the secondary connected using Display Port to HDMI. If the secondary monitor (connected using the reduction) is connected, the system cannot switch off monitors (all of them). If I disconnect the monitor connected using the reduction, the system switches off the monitor after the specified time of inactivity (the Blank Screen options in Power Saving Options). I have replaced the cable (DP to HDMI) for DP to DP, and the displays started working as expected. In Windows 10 system, the issue is not present. Other Linux distros seem to be affected too. Reproducible: Always Steps to Reproduce: I'm not sure if other HW is affected. 1. Connect the monitor using Display Port to the HDMI cable (Display Port in the Graphic Card, HDMI in a monitor). 2. In Fedora Workstation (version 38), in Power Saving Options, set Screen Blank to 1 minute. 3. Wait a minute. The monitor dims but not switches off. Actual Results: The monitor is not switched off. It dims, but the backlight is still on. Expected Results: The monitor switches off, no backlight.
Hi, I have a similar issue on Red Hat Enterprise Linux release 9.2 (Plow), GNOME 40.4.0, Wayland. I have two ports on my PC: DPort & HDMI. I tested both, using their native cables (HDMI to HDMI and DPort to DPort) with exactly the same settings (Screen Blank = 5 mins). Result is: 1) When monitor is connected via HDMI, after 5 minutes the monitor only dims 2) When monitor is connected via DPort, after 5 minutes the monitor goes into stand by mode and completely turns off My HW: PC: Micro Computer HK Tech Limited minisforum TH80 Memory: 32GB Processor: 11th Gen Intel Core i7-11800H @ 2.30GHz × 16 Graphics: Mesa Intel UHD Graphics (TGL GT1) Disk: 1.5 TB Monitor: Xiaomi Curved Gaming Monitor 34" $ xset q Keyboard Control: auto repeat: on key click percent: 0 LED mask: 00000000 XKB indicators: 00: Caps Lock: off 01: Num Lock: off 02: Scroll Lock: off 03: Compose: off 04: Kana: off 05: Sleep: off 06: Suspend: off 07: Mute: off 08: Misc: off 09: Mail: off 10: Charging: off 11: Shift Lock: off 12: Group 2: off 13: Mouse Keys: off auto repeat delay: 500 repeat rate: 33 auto repeating keys: 00ffffffdffffbbf fadfffefffedffff 9fffffffffffffff fff7ffffffffffff bell percent: 50 bell pitch: 400 bell duration: 100 Pointer Control: acceleration: 2/1 threshold: 4 Screen Saver: prefer blanking: yes allow exposures: yes timeout: 300 cycle: 300 Colors: default colormap: 0x40 BlackPixel: 0x0 WhitePixel: 0xffffff Font Path: catalogue:/etc/X11/fontpath.d,built-ins DPMS (Energy Star): Server does not have the DPMS Extension