laptop and a external screen configured as above: Screen 0: minimum 320 x 200, current 1920 x 2100, maximum 8192 x 8192 LVDS1 connected 1440x900+0+1200 (normal left inverted right x axis y axis) 331mm x 207mm 1440x900 59.9*+ 59.9 40.0 1360x768 59.8 60.0 1152x864 60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA1 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm 1920x1200 60.0*+ When I open e.g. dolphin or konsole, there window is placed behind the panel-at-the-top. See attached screen shot Reproducible: Always Steps to Reproduce: 0. Move the KDE panel to the top of the laptop screen 1. connect an external 2nd monitor 2. configure 2nd screen as above the laptop screen 3. open an application (dolphin or konsole) on laptop screen 4. maximize the window Actual Results: 3. => The top window is hidden behind the panel-at-the-top of the laptop screen at if the panel would not there. (see screen shot) 4. => the window consumes the complete size of the laptop screen. Again as in 3. acting as if there is no panel at the top of the laptop screen. Expected Results: 3. => Window opens below the panel (same behavior as with only the laptop screen) 4. => Don't use the vertical space consumed by the panel (same behavior as with only the laptop screen)
Created attachment 76318 [details] dolphin and konsole placed on startup behind the panel dolphin placed behind panel on startup (see step 3.) maximized konsole is also behind panel (see step 4.)
*** This bug has been marked as a duplicate of bug 167852 ***
Sh... it's even older. THis is a shortcoming of the NETWM spec. *** This bug has been marked as a duplicate of bug 94470 ***
(In reply to comment #3) Step 3. had nothing to do with maximized windows. but ... #$%^& After moving the maximized konsole (see step 4.) to the second screen (with Alt-Click Drag) so I can click on the maximize button, that was hidden behind the panel, I can not reproduce "Applications placed at startup behind panel-at-the-top" (step 3.) anymore :-( Now all opened applications honour the space occupied by the panel. Maximixed windows hide behind panel (step 4) is still reproduceable. So my report is a duplicate Vertical maximizing (Middle click on maximize button) is okay. It does not use the space occupied panel So Step 3. is now magically fixed. Step 4. problem still exits.
It's not related to maximized windows. The panel is treated "not there" in general because of that problem (it does not restrict the workspace at all) What *could* be a problem (not tested) is if you use "topleft" placement, the panel is likely (still) ignored. For "smart" placement such collision is tried to avoided, but if there's no "better" option, the panel is no hard restriction to prevent that (in general and aside any bugs i'd suggest to keep it below windows in this setup) If the panel isn't configured, the topleft placement is iirc also used if the window tries to position it ouside the screen - this would somewhere fit some observations in bug #286146