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#1 2020-03-24 08:15:06

sparr
Member
Registered: 2019-03-07
Posts: 10

Installed Plasma, many different UI misbehaviors I've never seen

I am on a fresh install of arch on a Dell XPS 13 7390 laptop. I am using kernel 5.5.11-zen1-1-zen, plasma 5.18.3-1, intel integrated graphics. I have installed lightdm and the plasma package group. I boot to the lightdm login screen and log in with the Plasma session automatically selected. This leads me to a relatively empty but seemingly working KDE/Plasma desktop. I can right click on the desktop to get a fully functional context menu. There's a grey bar at the bottom with a black plasma icon on the left and a clock and some icons on the right. If I start typing, a search bar appears at the top. All of this is as expected, and then things go off the rails...

After I launch an xterm or any other program, on the panel there are buttons for the open windows. I know they are there from past experience, but they are invisible! Nothing renders there, just the grey background of the panel. I can interact with them (hover and see the preview popup, click to min/maximize), I just can't see them.

The system tray area (icons, clock, show desktop button) jumps back and forth between its normal position at the bottom right and a position about a hundred pixels to the right of the launcher menu button on the left. It jumps almost any time I interact with the panel, including just moving my mouse over it. However, the jump is only visual. Regardless of where it renders I can still use the mouse to interact with it in the bottom right corner of the screen where it should be, and if I try to click on it when it's on the left I end up clicking on the invisible task manager window button in that spot.

In the launcher ("start") menu, the two applications in Favorites (System Settings and Discover) are greyed out, but I can still click them to launch them. Trying to type into the search box causes the greyed out items to flicker more-grey, and no text appears in the search box. Clicking on the other bottom tabs (Applications, Computer, History, ...) does not change tabs, but does make the two items flicker, and they also flicker intermittently when I move my mouse cursor around over the menu.

Spectacle and Scrot (screenshot tools) both capture black screens, optionally including the mouse cursor. They cannot see the open windows or the panel.

In System Settings I cannot scroll up or down the list on the left, the scroll bar just jumps a little then jumps back.

Using the search bar to launch Touchpad Settings, the window is very short; I have to stretch it much taller to see the contents. I cannot scroll within it, not even enough to make the scroll bar jump around like in System Settings.

I can probably find other symptoms if I keep looking, but thought this would be enough to start finding help with troubleshooting.

`journalctl -xe` has a bunch of output from plasma and kde processes, as follows (non-KDE stuff omitted):

Mar 24 00:46:45 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64276, resource id: 62914613, major code: 15 (QueryTree), minor code: 0
Mar 24 00:46:45 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64281, resource id: 62914613, major code: 18 (ChangeProperty), minor code: 0
Mar 24 00:46:48 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 65402, resource id: 62915605, major code: 15 (QueryTree), minor code: 0
Mar 24 00:46:48 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 65407, resource id: 62915605, major code: 18 (ChangeProperty), minor code: 0
Mar 24 00:46:48 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 65491, resource id: 62914563, major code: 15 (QueryTree), minor code: 0
Mar 24 00:46:48 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 65496, resource id: 62914563, major code: 18 (ChangeProperty), minor code: 0
Mar 24 00:48:13 shaggy plasmashell[723]: kf5.kservice.services: KServiceTypeTrader: serviceType "ThumbCreator" not found
Mar 24 00:48:13 shaggy plasmashell[723]: SwitcherBackend: FAILED to get the thumbnail "Unknown error code 0\n\nPlease send a full bug report at https://bugs.kde.org." ("Undocumented Er>
Mar 24 00:48:13 shaggy plasmashell[723]: kf5.kservice.services: KServiceTypeTrader: serviceType "ThumbCreator" not found
Mar 24 00:48:13 shaggy plasmashell[723]: SwitcherBackend: FAILED to get the thumbnail "Unknown error code 0\n\nPlease send a full bug report at https://bugs.kde.org." ("Undocumented Er>
Mar 24 00:48:15 shaggy plasmashell[723]: trying to show an empty dialog
Mar 24 00:48:15 shaggy plasmashell[723]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:165: TypeError: Cannot read property 'showingDialog' of null
Mar 24 00:53:11 shaggy krunner[870]: 
Mar 24 00:53:11 shaggy krunner[870]: 
Mar 24 00:53:12 shaggy systemsettings5[2287]: QQmlEngine::setContextForObject(): Object already has a QQmlContext
Mar 24 00:53:33 shaggy systemsettings5[2287]: Couldn't load plugin: "The shared library was not found."
Mar 24 00:53:37 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 3731, resource id: 81789157, major code: 18 (ChangeProperty), minor code: 0
Mar 24 00:53:37 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 3735, resource id: 8388753, major code: 18 (ChangeProperty), minor code: 0
Mar 24 00:53:40 shaggy krunner[870]: 
Mar 24 00:53:40 shaggy krunner[870]: 
Mar 24 00:53:40 shaggy krunner[870]: 
Mar 24 00:53:40 shaggy krunner[870]: 
Mar 24 00:53:43 shaggy krunner[870]: 
Mar 24 00:53:43 shaggy krunner[870]: 
Mar 24 00:53:44 shaggy krunner[870]: 
Mar 24 00:54:11 shaggy krunner[870]: 
Mar 24 00:54:11 shaggy krunner[870]: 
Mar 24 00:54:15 shaggy krunner[870]: 
Mar 24 00:54:15 shaggy krunner[870]: 
Mar 24 00:54:16 shaggy krunner[870]: 
Mar 24 00:54:16 shaggy krunner[870]: 
Mar 24 00:54:16 shaggy krunner[870]: 
Mar 24 00:54:17 shaggy krunner[870]: 
Mar 24 00:54:20 shaggy kcmshell5[2303]: Couldn't load plugin: "The shared library was not found."
Mar 24 00:54:20 shaggy kcmshell5[2303]: kcm_touchpad: Using X11 backend
Mar 24 00:54:20 shaggy kcmshell5[2303]: qml: Touchpad configuration of device '1 : SynPS/2 Synaptics TouchPad' opened
Mar 24 00:54:20 shaggy kcmshell5[2303]: file:///usr/lib/qt/qml/org/kde/kirigami.2/FormLayout.qml:112:21: Unable to assign [undefined] to double
Mar 24 00:54:38 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 14292, resource id: 81789128, major code: 18 (ChangeProperty), minor code: 0
Mar 24 00:57:30 shaggy plasmashell[723]: trying to show an empty dialog
Mar 24 00:57:30 shaggy plasmashell[723]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:165: TypeError: Cannot read property 'showingDialog' of null
Mar 24 00:57:31 shaggy plasmashell[723]: trying to show an empty dialog
Mar 24 00:57:31 shaggy plasmashell[723]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:165: TypeError: Cannot read property 'showingDialog' of null
Mar 24 00:57:32 shaggy plasmashell[723]: trying to show an empty dialog
Mar 24 00:57:32 shaggy plasmashell[723]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:165: TypeError: Cannot read property 'showingDialog' of null
Mar 24 00:57:33 shaggy kwin_x11[717]: Could not attach Keys property to:  PlasmaQuick::Dialog(0x55dfd6fde9c0)  is not an Item
Mar 24 00:57:34 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 35506, resource id: 41959929, major code: 20 (GetProperty), minor code: 0
Mar 24 00:59:13 shaggy krunner[870]: 
Mar 24 01:00:31 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 50203, resource id: 41960419, major code: 20 (GetProperty), minor code: 0
Mar 24 01:00:41 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 51580, resource id: 41961282, major code: 3 (GetWindowAttributes), minor code: 0
Mar 24 01:00:41 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 51581, resource id: 41961282, major code: 14 (GetGeometry), minor code: 0
Mar 24 01:00:41 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 51584, resource id: 41961282, major code: 3 (GetWindowAttributes), minor code: 0
Mar 24 01:00:41 shaggy kwin_x11[717]: qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 51585, resource id: 41961282, major code: 14 (GetGeometry), minor code: 0
Mar 24 01:02:59 shaggy plasmashell[723]: trying to show an empty dialog
Mar 24 01:02:59 shaggy plasmashell[723]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:165: TypeError: Cannot read property 'showingDialog' of null
Mar 24 01:03:00 shaggy plasmashell[723]: trying to show an empty dialog
Mar 24 01:03:00 shaggy plasmashell[723]: file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:165: TypeError: Cannot read property 'showingDialog' of null

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#2 2020-03-24 09:16:12

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 21,427

Re: Installed Plasma, many different UI misbehaviors I've never seen

Double check your compositor settings and ensure it's enabled (on first boots/installs (and graphics driver/mesa and qt and plasma updates) there can sometimes be a race condition between the GPU having to compile the new shaders for plasma/kwin and kwin not getting the finished result soon enough and thus surmising your acceleration must be broken), if you are currently using xf86-video-intel, remove it. It's generally known for various issues and specifically known for causing issues on KDE and is discouraged there (since much longer that it is generally discouraged because it has somewhat of a dragging development).

if these aren't sufficient post a full journal of an affected boot

sudo journalctl -b

) and maybe a

glxinfo -B #Needs mesa-demos

Last edited by V1del (2020-03-24 09:21:23)

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#3 2020-03-24 10:06:18

sparr
Member
Registered: 2019-03-07
Posts: 10

Re: Installed Plasma, many different UI misbehaviors I've never seen

I was not able to check the Compositor settings because I could not get to that interface.

Switching away from xf86-video-intel and following the other setup instructions at https://wiki.archlinux.org/index.php/intel_graphics seems to have resolved at least most, possibly all, of the problems.

Thank you.

Last edited by sparr (2020-03-24 10:06:30)

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#4 2020-03-24 10:35:20

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 21,427

Re: Installed Plasma, many different UI misbehaviors I've never seen

Glad to hear, please mark as [SOLVED] by editing the title in your first post: https://wiki.archlinux.org/index.php/Co … ow_to_post

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