Hi,
I installed yesterday KDE Neon for the first time. It's all going smootly except for an annoying problem that occurs after a minute that I've logged into the system: whatever I'm doing, the system freezes for a minute or two.
I'm using the latest KDE Neon version on a DELL XPS 15 9560.
I tried launching tail -f /var/log/syslog and I saw this:

Code: Select all

Mar 27 10:55:29 mattia-xps159560 systemd[866]: Finished Exit the Session.
Mar 27 10:55:29 mattia-xps159560 systemd[866]: Reached target Exit the Session.
Mar 27 10:55:29 mattia-xps159560 systemd[1]: user@118.service: Succeeded.
Mar 27 10:55:29 mattia-xps159560 systemd[1]: Stopped User Manager for UID 118.
Mar 27 10:55:29 mattia-xps159560 systemd[1]: Stopping User Runtime Directory /run/user/118...
Mar 27 10:55:29 mattia-xps159560 systemd[919]: run-user-118.mount: Succeeded.
Mar 27 10:55:29 mattia-xps159560 systemd[1]: run-user-118.mount: Succeeded.
Mar 27 10:55:29 mattia-xps159560 systemd[1]: user-runtime-dir@118.service: Succeeded.
Mar 27 10:55:29 mattia-xps159560 systemd[1]: Stopped User Runtime Directory /run/user/118.
Mar 27 10:55:29 mattia-xps159560 systemd[1]: Removed slice User Slice of UID 118.
Mar 27 10:55:35 mattia-xps159560 systemd[1]: NetworkManager-dispatcher.service: Succeeded.
Mar 27 10:55:40 mattia-xps159560 systemd[1]: systemd-fsckd.service: Succeeded.
Mar 27 10:55:41 mattia-xps159560 systemd-timesyncd[558]: Initial synchronization to time server 91.189.89.198:123 (ntp.ubuntu.com).
Mar 27 10:55:41 mattia-xps159560 systemd[1]: systemd-hostnamed.service: Succeeded.
Mar 27 10:55:41 mattia-xps159560 packagekitd[1207]: Starting pkgProblemResolver with broken count: 0
Mar 27 10:55:41 mattia-xps159560 packagekitd[1207]: Starting 2 pkgProblemResolver with broken count: 0
Mar 27 10:55:41 mattia-xps159560 packagekitd[1207]: Done
Mar 27 10:55:41 mattia-xps159560 PackageKit: get-updates transaction /186_cbebdcce from uid 1000 finished with success after 401ms
Mar 27 10:55:42 mattia-xps159560 dbus-daemon[587]: [system] Activating via systemd: service name='org.freedesktop.locale1' unit='dbus-org.freedesktop.locale1.service' requested by ':1.75' (uid=1000 pid=1159 comm="/usr/lib/x86_64-linux-gnu/libexec/DiscoverNotifier" label="unconfined")
Mar 27 10:55:42 mattia-xps159560 systemd[1]: Starting Locale Service...
Mar 27 10:55:42 mattia-xps159560 dbus-daemon[587]: [system] Successfully activated service 'org.freedesktop.locale1'
Mar 27 10:55:42 mattia-xps159560 systemd[1]: Started Locale Service.
Mar 27 10:55:45 mattia-xps159560 kded5[1044]: kf.auth: "Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken."
Mar 27 10:56:12 mattia-xps159560 systemd[1]: systemd-localed.service: Succeeded.
Mar 27 10:56:22 mattia-xps159560 kernel: [   74.680413] nvme nvme0: I/O 17 QID 0 timeout, reset controller

######################### HERE THE SYSTEM FREEZES FOR A MINUTE #########################

Mar 27 10:57:12 mattia-xps159560 systemd[1]: Condition check resulted in Daily apt upgrade and clean activities being skipped.
Mar 27 10:57:24 mattia-xps159560 kernel: [  136.350056] nvme nvme0: 8/0/0 default/read/poll queues
Mar 27 10:57:24 mattia-xps159560 plasmashell[1116]: trying to show an empty dialog
Mar 27 10:57:55 mattia-xps159560 kwin_x11[1048]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 16827, resource id: 14681356, major code: 3 (GetWindowAttributes), minor code: 0
Mar 27 10:58:00 mattia-xps159560 kwin_x11[1048]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 18237, resource id: 14681532, major code: 20 (GetProperty), minor code: 0
Mar 27 10:58:07 mattia-xps159560 wpa_supplicant[628]: wlp2s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-22 noise=-106 txrate=1000
Mar 27 10:59:38 mattia-xps159560 kwin_x11[1048]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 34447, resource id: 14681530, major code: 3 (GetWindowAttributes), minor code: 0
Mar 27 10:59:38 mattia-xps159560 kwin_x11[1048]: qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 34448, resource id: 14681530, major code: 14 (GetGeometry), minor code: 0
Mar 27 11:00:01 mattia-xps159560 kwin_x11[1048]: qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 37270, resource id: 37748951, major code: 73 (GetImage), minor code: 0
Mar 27 11:00:01 mattia-xps159560 kwin_x11[1048]: qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 37271, resource id: 37748951, major code: 73 (GetImage), minor code: 0
Mar 27 11:00:01 mattia-xps159560 kwin_x11[1048]: qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 37272, resource id: 37748951, major code: 73 (GetImage), minor code: 0
Mar 27 11:00:01 mattia-xps159560 kwin_x11[1048]: qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 37273, resource id: 37748951, major code: 73 (GetImage), minor code: 0
Mar 27 11:00:04 mattia-xps159560 plasmashell[1116]: file:///usr/share/plasma/plasmoids/org.kde.plasma.private.systemtray/contents/ui/CurrentItemHighLight.qml:31: TypeError: Cannot read property 'width' of null
Mar 27 11:00:04 mattia-xps159560 plasmashell[1116]: file:///usr/share/plasma/plasmoids/org.kde.plasma.private.systemtray/contents/ui/CurrentItemHighLight.qml:32: TypeError: Cannot read property 'height' of null
Mar 27 11:00:17 mattia-xps159560 rtkit-daemon[931]: Supervising 4 threads of 2 processes of 1 users.


This is the only OS that is giving me this problem.
Has somebody managed to solve this issue?

Thanks a lot in advance
Mattia