SUMMARY: KDE Plasma Multi-Monitor BUG - No Video Output on one Monitor (No Output Signal) & Display Issue on other monitor after update to 5.24.2 KDE Plasma Multi-Monitor BUG - No Video Output on one Monitor (No Output Signal) & Display Issue on other monitor after update to 5.24.2 PC MotherBoard Hardware: Intel Desktop PC (ASUS P8Z77-M) https://www.asus.com/us/Motherboards/P8Z77M/HelpDesk_BIOS/ AMD/ATI = Radeon HD 7850 (7000 Series) PCI-E Video Card UEFI BIOS Version 2203 2016/02/194.26 MBytes P8Z77-M BIOS 2203 Monitors & their Connections: Sony TV - Bravia KDL-40CX520 - 40" WideScreen Sony TV - Bravia KDL-32CX520 - 32" WideScreen - PRIMARY Monitor Philips 200P7 20" (Formerly HP VA905 19") 1. SONY 32" TV - HDMI cable to AMD/ATI Radeon video card - Main PC Desktop Monitor (has Taskbar & Icons on it's desktop) - Res: 1920 x 1080 2. Philips 200P7 20" - DVI cable to AMD/ATI Radeon video card - Res: 1600 x 1200 (4:3) 3. SONY 40" TV - HDMI cable to Motherboard Integrated Intel HD4000 GPU Motherboard Chip (i915 driver) - Res: 1920 x 1080 NOTE: SONY 32" TV Desktop is set to 80% Scale AMD/ATI = Radeon HD 7850 (7000 Series) PCI-E Video Card KDE Plasma Display Set up is as above from left to right hand side NAME: KDE Plasma Monitor BUG - No Video Output on 2 Monitors after update to 5.24.2 - No Output Signal DESC: Main monitor just shows it's own WORD/TEXT Display for the Currently Selected Input (HDMI X), where X is the HDMI port number The SONY 32" Bravia TV Set just shows the Currently Chosen Input Method on the screen whenever a video/picture signal is expected but none is currently presenting itself to the TV Sets currently chosen input method Linux Distro: OpenSUSE Tumbleweed CONDITIONS: Both monitors 1 & 2 are ON Settings > Energy Saving - Screen Energy Saving: OFF RESULT: SONY 32" Monitor gives a black screen - Description above Philips 200P7 - Only displays a black background - Can see the mouse pointer, but no mouse context menu working Dragging a window from the 32" Primary Monitor to the Philips Monitor does not show the window or any outline of a window on the Philips monitor Philips Monitor will show the different mouse pointer (the horizontal and vertical direction lines) with window drag NOTES: I have had no problems using the Motherboards Internal VGA Output connected to my 32" TV/Monitor - All Monitors & Displays are 100% completely stable whenever turning any of the Monitors/TV's off and back on again using VGA. Issue has persisted on at least 6 previous kernel releases as well KDE SYSTEM INFO - AS OF DATE Saturday the 26th of February, 2022: Operating System: openSUSE Tumbleweed 20220224 KDE Plasma Version: 5.24.2 KDE Frameworks Version: 5.91.0 Qt Version: 5.15.2 Kernel Version: 5.16.10-1-default (64-bit) Graphics Platform: Wayland Processors: 4 × Intel® Core™ i5-3570K CPU @ 3.40GHz Memory: 15.5 GiB of RAM Graphics Processor: AMD PITCAIRN BUG REPORTED ON DATE: Saturday the 26th of February, 2022 ORIGINAL BUGS REPORT I SUBMITTED: "Wayland - Multi-monitor - Turning Off main desktop monitor and back on again results in main monitor losing the bottom half of the screen (THE TASKBAR) & other Anomilies" https://bugs.kde.org/show_bug.cgi?id=435834 KDE BUG SUBMITTED ON DATE: Saturday the 17th of April, 2021 TIME: 1.12 PM KDE Plasma Monitor BUG - Turning main Display (SONY 32 Inch TV) OFF and then Back ON Results in Apparent Disconnection of HDMI Cable OR HDMI output signal turned OFF https://bugs.kde.org/show_bug.cgi?id=447856 NOTE: There is a URL option for big screens (was not submitted to) https://bugs.kde.org/enter_bug.cgi?product=plasma-bigscreen RELATED BUGS - KDE Plasma - Multi-Monitor Display Bugs: Bug 442980 - Plasma wayland session does not re-detect external monitor https://bugs.kde.org/show_bug.cgi?id=442980 Bug 434604 - Multiple monitor configuration gets broken https://bugs.kde.org/show_bug.cgi?id=434604 Bug 438839 - Wayland - turning monitor off and back on causes plasmashell to make invalid xdgshell request and crash https://bugs.kde.org/show_bug.cgi?id=438839 Bug 431856 - kscreen frequently mess resolution on a dual monitor setup https://bugs.kde.org/show_bug.cgi?id=431856 Bug 446282 - Plugging in external monitor that is powered off crashes all apps https://bugs.kde.org/show_bug.cgi?id=446282 Bug 406429 - after monitors power off/on screens messed up https://bugs.kde.org/show_bug.cgi?id=406429 Bug 353637 - Cannot enable second monitor in Display Configuration https://bugs.kde.org/show_bug.cgi?id=353637 Bug 446078 - Attaching/detaching external monitors with Wayland crashes apps/hides Plasma panel https://bugs.kde.org/show_bug.cgi?id=446078 Bug 436648 - Switching monitor input from one connector type to another loses containment mapping/screen setup https://bugs.kde.org/show_bug.cgi?id=436648 Bug 397136 - wayland: after energy saving turns monitors off and i try to wake them on with a mouse, one monitor is unusable https://bugs.kde.org/show_bug.cgi?id=397136 Bug 406429 - after monitors power off/on screens messed up https://bugs.kde.org/show_bug.cgi?id=406429 Bug 353722 - background lost multi-monitor setup https://bugs.kde.org/show_bug.cgi?id=353722 -------------------------------------------------------------------------------------------------------------------------------------------------------------- Bug 406429 - after monitors power off/on screens messed up https://bugs.kde.org/show_bug.cgi?id=406429 Bug 353722 - background lost multi-monitor setup https://bugs.kde.org/show_bug.cgi?id=353722 Bug 418899 - Everything is unusable after monitor turn on https://bugs.kde.org/show_bug.cgi?id=418899 Bug 431417 - Plasma crash when dual screens turned off https://bugs.kde.org/show_bug.cgi?id=431417 Bug 419724 - kwin_wayland crashed when external monitor was turned on https://bugs.kde.org/show_bug.cgi?id=419724 Bug 417807 - kwin crash after external monitor turned off and on again https://bugs.kde.org/show_bug.cgi?id=417807 Bug 416401 - KWin crashes after turning on monitor and unlocking KDE Plasma https://bugs.kde.org/show_bug.cgi?id=416401 Bug 414872 - Crash when unplugging second monitor under Wayland https://bugs.kde.org/show_bug.cgi?id=414872 Bug 403519 - Wayland session crashed immediately after I connect an external monitor to hdmi port https://bugs.kde.org/show_bug.cgi?id=403519 Bug 412178 - crash after reconnecting external monitor https://bugs.kde.org/show_bug.cgi?id=412178 Bug 424694 - kwin_wayland crashes when enabling monitor https://bugs.kde.org/show_bug.cgi?id=424694 Bug 434604 - Multiple monitor configuration gets broken https://bugs.kde.org/show_bug.cgi?id=434604 Bug 350954 - Display settings drops with multiple monitor configurations. It causes hangs. https://bugs.kde.org/show_bug.cgi?id=350954 Bug 419728 - kwin_wayland crashes when external monitor is disconnected from hdmi port while multi-monitor mode is set to "Switch to external screen" https://bugs.kde.org/show_bug.cgi?id=419728 Bug 428706 - Cannot unlock session after external screen switches off in Wayland https://bugs.kde.org/show_bug.cgi?id=428706 Bug 356727 - Plasma Panel sometimes disappears with multiple monitors https://bugs.kde.org/show_bug.cgi?id=356727
ISSUE IN: x11 (x.org): NO Wayland: YES After Updating opensuse tumbleweed on my MacbookPro Laptop, the Wayland session only gives a black screen that only shows the mouse pointer, again, no mouse context menus are shown I booted into X11, went to Settings > display and made the 'other' monitor/screen the default Primary monitor i then logged out of x11 and logged into Wayland - same display issue
UPDATE: I have disconnected my Philips 200P7 20" Monitor connected by DVI cable to AMD/ATI Radeon video to my Motherboards built-in DVI connector That monitor now displays a working screen ON DATE: Monday the 28th of February, 2022
can replicate the issue in my setup with Arch, with 2 GPUs I have 1 display connected to each GPU. since 5.24.2 only the second GPU has signal, display settings can't be changed if the issue is present and if the second display is disconnected the system crashes. a workaround is to start the session with only the main display connected and then connecting the second display and it'll work as expected, downgrading to kwin 5.24.1 is also a workaround GPUs: AMD RX 470 (HDMI Display) AMD HD 6950 (DVI Display)
Related Bug 448220 One or both dual monitors powers off after login to Wayland KDE https://bugs.kde.org/show_bug.cgi?id=448220
This issue is specific to multi-gpu and has been fixed in 5.24.3 *** This bug has been marked as a duplicate of bug 450737 ***