Here are the steps to reproduce: 1. Start the computer with KDE Neon 5.12 and two screens (A is on laptop and B is a normal external screen) 2. When on logon screen, by default it seems that the display is kind of cloned, it displays the same logon screen on both screens, but you can move the mouse on one or the other (so it's not really cloned), let's just fill the default screen which is screen A 3. Then KDE plasma loads 4. And the desktop wallpaper is black with nothing on it, when you try to right click there is no menu (maybe a crash) Now if you restart the computer (not switch session), then use the screen B to connect, it seems that the desktop is loading normally with the wallpaper and stuffs on it.. I can't tell much, but I think it could be related to multi-displays, so it depends on which screen you use to login. I have this bug since at least 6 months or more. KDE Plasma: 5.12.2 KDE Frameworks: 5.43.0 Qt: 5.10.0 Linux kernel: 4.13.0.36-generic OS: KDE Neon 5.12 64-bit CPU: Intel Core i7-3820QM @2.7Ghz RAM: 15.6Gio
I've also just started getting this bug in the past week. No wallpaper appears on my primary display and right-click doesn't bring up the context menu, but the panel is still drawn. On my secondary monitor, the wallpaper renders fine and the context menu can still be brought up. I'm not exactly sure when it started, it might have been after the plasma 5.12.4 update? System info: Arch Linux Plasma 5.12.4 Frameworks 5.44 Qt 5.10.1 Nvidia proprietary driver 390.48
Can you run "xwininfo" and click on the black and paste the results. Also output of "plasmashell" from a terminal
xwininfo output on the black background: xwininfo: Window id: 0x1ef (the root window) (has no name) Absolute upper-left X: 0 Absolute upper-left Y: 0 Relative upper-left X: 0 Relative upper-left Y: 0 Width: 3840 Height: 1080 Depth: 24 Visual: 0x21 Visual Class: TrueColor Border width: 0 Class: InputOutput Colormap: 0x20 (installed) Bit Gravity State: ForgetGravity Window Gravity State: NorthWestGravity Backing Store State: NotUseful Save Under State: no Map State: IsViewable Override Redirect State: no Corners: +0+0 -0+0 -0-0 +0-0 -geometry 3840x1080+0+0 xwininfo on the desktop with wallpaper: xwininfo: Window id: 0x1e00016 "Desktop — Plasma" Absolute upper-left X: 0 Absolute upper-left Y: 0 Relative upper-left X: 0 Relative upper-left Y: 0 Width: 1920 Height: 1080 Depth: 32 Visual: 0x7a Visual Class: TrueColor Border width: 0 Class: InputOutput Colormap: 0x1e00015 (not installed) Bit Gravity State: NorthWestGravity Window Gravity State: NorthWestGravity Backing Store State: NotUseful Save Under State: no Map State: IsViewable Override Redirect State: no Corners: +0+0 -1920+0 -1920-0 +0-0 -geometry 1920x1080+0+0
Created attachment 111867 [details] output from running plasmashell After I ran plasmashell in a terminal, my wallpaper is appearing on both monitors again. I've attached the output anyway.
I had similar behaviour several times, but not every time on login. In my case external display is bigger than the LVDS one and with the latter being disabled I see black part only on the left of a larger screen with the desktop being moved to the right and only part of it visible.
I'm getting the same issue on 5.20.3.
*** Bug 399216 has been marked as a duplicate of this bug. ***
*** Bug 369450 has been marked as a duplicate of this bug. ***
*** Bug 440918 has been marked as a duplicate of this bug. ***
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*** Bug 373880 has been marked as a duplicate of this bug. ***
Most likely the same root cause as Bug 370180 and Bug 356225.
*** Bug 417726 has been marked as a duplicate of this bug. ***
*** Bug 440995 has been marked as a duplicate of this bug. ***
*** Bug 382374 has been marked as a duplicate of this bug. ***
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*** Bug 381270 has been marked as a duplicate of this bug. ***
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*** Bug 442455 has been marked as a duplicate of this bug. ***
Karl, if you can still reproduce this issue in Plasma 5.27.4, can you run `kscreen-doctor -o` in a terminal window? Does it report that the screens are overlapping--even by one pixel? You'll need to compare their "geometry" values.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!