https://bugs.kde.org/show_bug.cgi?id=362051
--- Comment #3 from Daniel Lichtenberger <daniel.lichtenber...@gmx.net> --- I'm having the same issue and I also suspect it's some kind of race condition. For me the panel is stored on the wrong (left) screen about 50% of boots. Killing and restarting plasmashell does not trigger the issue. I'm currently also using the following patch to replace kscreen with QT 5.6-based screen handling in plasmashell, but it didn't solve the issue: https://git.reviewboard.kde.org/r/125451/ I added debug statements to the PanelView constructor and to the screen change-listener of plasmashell. Here's the output of a successful boot (panel restored on the right screen): > Creating panelView, setting screen to QRect(1280,0 1680x1050) Here's the output of an unsucessful boot (panel restored on the left screen): > Creating panelView, setting screen to QRect(1280,0 1680x1050) > Screen changed: old= QRect(1280,0 1680x1050) , new= QRect(0,0 1280x1024) , > geometry= QRect(1280,1020 1x30) > Screen changed: old= QRect(0,0 1280x1024) , new= QRect(1280,0 1680x1050) , > geometry= QRect(0,994 1x30) > Screen changed: old= QRect(1280,0 1680x1050) , new= QRect(0,0 1280x1024) , > geometry= QRect(0,994 1x30) The panel briefly oscillates between the two screens before staying on the "wrong" screen. I also got a stacktrace in the screen change listener, it seems like the 'TopLevelScreen' is being changed: /usr/bin/plasmashell() [0x431c74] /usr/bin/plasmashell() [0x435144] /usr/bin/plasmashell() [0x43a147] /usr/bin/plasmashell() [0x43a044] /usr/bin/plasmashell() [0x439e63] /usr/lib64/libQt5Core.so.5(_ZN11QMetaObject8activateEP7QObjectiiPPv+0x98e) [0x7f9412607ace] /usr/lib64/libQt5Gui.so.5(_ZN7QWindow13screenChangedEP7QScreen+0x2f) [0x7f9412b322bf] /usr/lib64/libQt5Gui.so.5(_ZN14QWindowPrivate26emitScreenChangedRecursionEP7QScreen+0x15) [0x7f9412b328a5] /usr/lib64/libQt5Gui.so.5(_ZN14QWindowPrivate17setTopLevelScreenEP7QScreenb+0x1bd) [0x7f9412b383fd] /usr/lib64/libQt5Gui.so.5(_ZN22QGuiApplicationPrivate31processWindowScreenChangedEventEPN29QWindowSystemInterfacePrivate24WindowScreenChangedEventE+0x201) [0x7f9412b2bda1] /usr/lib64/libQt5Gui.so.5(_ZN22QGuiApplicationPrivate24processWindowSystemEventEPN29QWindowSystemInterfacePrivate17WindowSystemEventE+0x145) [0x7f9412b305c5] /usr/lib64/libQt5Gui.so.5(_ZN22QWindowSystemInterface22sendWindowSystemEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE+0xbb) [0x7f9412b0effb] /usr/lib64/libQt5XcbQpa.so.5(+0x6fa10) [0x7f9404f08a10] /usr/lib64/libglib-2.0.so.0(g_main_context_dispatch+0x287) [0x7f940de9e227] /usr/lib64/libglib-2.0.so.0(+0x4c458) [0x7f940de9e458] /usr/lib64/libglib-2.0.so.0(g_main_context_iteration+0x2c) [0x7f940de9e4fc] /usr/lib64/libQt5Core.so.5(_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE+0x5f) [0x7f941262ec3f] /usr/lib64/libQt5Core.so.5(_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE+0xea) [0x7f94125da79a] /usr/lib64/libQt5Core.so.5(_ZN16QCoreApplication4execEv+0x8d) [0x7f94125e2a6d] /usr/bin/plasmashell() [0x4232e6] /lib64/libc.so.6(__libc_start_main+0xf0) [0x7f9411748710] /usr/bin/plasmashell(_start+0x29) [0x41e859] I'm on openSUSE Tumbleweed, Plasma 5.6.3, Qt 5.6. I did not have the issue with Plasma 5.5 or before. -- You are receiving this mail because: You are watching all bug changes.
