Created attachment 153461 [details] the output of xport QT_MESSAGE_PATTERN="[%{time hh::mm:s.zzz}] %{function}: %{message}" kquitapp5 kded5 kded5 SUMMARY *** NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** STEPS TO REPRODUCE connect another screen to my laptop. OBSERVED RESULT both the external screen and the built-in become black and even if i successfully boot up both the screen ，if i go out for a while and the computer sleep, it cannot be waken up. EXPECTED RESULT both the screen work well SOFTWARE/OS VERSIONS Linux/KDE Plasma: archlinux kde (available in About System) KDE Plasma Version: 5.26.2 KDE Frameworks Version: 5.99.0 Qt Version: 5.15.7 ADDITIONAL INFORMATION
> [22::53:26.100] unknown: KScreen::Output(448, "HDMI-0", connected disabled primary, pos: QPoint(0,0), res: QSize(-1, -1), modeId: "", scale: 1, clone: no, rotation: KScreen::Output::None, followPreferredMode: false) This appears to be Bug 460341. The remaining parts of the issue don't appear to be KScreen's fault, so I'm moving the bug report to KWin. Are you using the X11 session or the Wayland session? What GPU hardware and drivers are you using?
I‘m using x11 session. I use a nvidia gpu rtx3060laptop and I am using the closed source driver provided in the AUR. The X11 configuration is default.
Besides, if i use xrandr --output HDMI-0 --mode 3840x2160 and use the display configuration in the system settings ,it can work well until i shut it down or it sleeps automatically.
Thanks for the info.