https://bugs.kde.org/show_bug.cgi?id=465424
Bug ID: 465424 Summary: Blank Screen on Attaching External Monitor Classification: Plasma Product: kwin Version: 5.26.90 Platform: Debian testing OS: Linux Status: REPORTED Severity: normal Priority: NOR Component: platform-x11-standalone Assignee: kwin-bugs-n...@kde.org Reporter: conorley...@gmail.com Target Milestone: --- Created attachment 156030 --> https://bugs.kde.org/attachment.cgi?id=156030&action=edit Debug & Sysinfo When I attach an external monitor to my laptop's HDMI port the monitor is recognised but both the laptop and external screen go blank after a few seconds, with only the mouse cursor functioning. kwin_x11 is using 100% cpu and when i kill -9 it, kwin restarts and everything works fine (until the HDMI cable is removed and re-inserted). This is with Debian 12 (testing) on a Lenovo P1 with Intel/ Nvidia graphics (nouveau driver). I believe the HDMI ports are hard-wired to the discrete GPU. I installed the Nvidia driver and updated to version 5.26.90. The behaviour is similar, except it will function properly until after a reboot. I did try Wayland and nothing happens when attaching the monitor. Attached is a debug file and system information (Nouveau & V5.26.4). SOFTWARE/OS VERSIONS Linux/KDE Plasma: Debian 12 KDE Plasma Version: 5.26.90 KDE Frameworks Version: 5.102.0 Qt Version: 5.15.8 -- You are receiving this mail because: You are watching all bug changes.