From time to time my UI freezes. I've found that kwin_x11 process is taking 100% CPU and I've to kill it manually & launch again to get things working. I'm using Slackware-current with KDE packages installed form here: http://taper.alienbase.nl/mirrors/alien-kde/current/5/x86_64/. I've attached GDB to this frozen process. Result: http://pastebin.com/UT9LKvsf I'm using Lenovo E540 laptop with external screen attached via HDMI cable. /sbin/lspci result: 00:00.0 Host bridge: Intel Corporation Haswell DRAM Controller (rev 06) 00:02.0 VGA compatible controller: Intel Corporation Haswell Integrated Graphics Controller (rev 06) 00:03.0 Audio device: Intel Corporation Haswell HD Audio Controller (rev 06) 00:16.0 Communication controller: Intel Corporation Lynx Point MEI Controller #1 (rev 04) 00:1a.0 USB controller: Intel Corporation Lynx Point USB Enhanced Host Controller #2 (rev 04) 00:1b.0 Audio device: Intel Corporation Lynx Point High Definition Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation Lynx Point PCI Express Root Port #1 (rev d4) 00:1c.2 PCI bridge: Intel Corporation Lynx Point PCI Express Root Port #3 (rev d4) 00:1c.3 PCI bridge: Intel Corporation Lynx Point PCI Express Root Port #4 (rev d4) 00:1c.4 PCI bridge: Intel Corporation Lynx Point PCI Express Root Port #5 (rev d4) 00:1d.0 USB controller: Intel Corporation Lynx Point USB Enhanced Host Controller #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation Lynx Point LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation Lynx Point 6-port SATA Controller 1 [AHCI mode] (rev 04) 00:1f.3 SMBus: Intel Corporation Lynx Point SMBus Controller (rev 04) 02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 5227 (rev 01) 03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller (rev 10) 04:00.0 Network controller: Intel Corporation Intel(R) Dual Band Wireless-AC 7260 (rev 83) Reproducible: Sometimes Steps to Reproduce: Use KDE as normal. Actual Results: From time to time UI freezes
Could be bug #340294 That would be caused by the tabbox (alt+tab) The fix is a QML file, you can simply override the present one with the one attached to the bug.
I've updated this file and everything started working. Thanks!
*** This bug has been marked as a duplicate of bug 340294 ***
Where do I place this qml file?
Distro dependend. Usually /usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/windowswitcher/WindowSwitcher.qml NOTICE that this was updated during the 5.2 cycle and we're preparing for the 5.4 release - sure you run into *this* issue?
You're right. It's not this issue. Thanks though.