Frequently I unlock my screen to find the plasmashell panel has locked up (clock stopped updating, nothing clickable). If I kill plasmashell and restart it, it starts working again and I can continue my session. plasma-workspace-5.3.0-6.fc22.x86_64.rpm
Depending on your driver, it could be dup of bug #1193742 or one of it's friends. Are you using intel video driver?
Apparently (lspci -v), yes I am: 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) (prog-if 00 [VGA controller]) DeviceName: Onboard IGD Subsystem: ZOTAC International (MCO) Ltd. Device b211 Flags: bus master, fast devsel, latency 0, IRQ 29 Memory at f7800000 (64-bit, non-prefetchable) [size=4M] Memory at e0000000 (64-bit, prefetchable) [size=256M] I/O ports at f000 [size=64] Expansion ROM at <unassigned> [disabled] Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 2 Capabilities: [a4] PCI Advanced Features Kernel driver in use: i915 Kernel modules: i915 I guess this makes this a duplicate of bug #1193742. *** This bug has been marked as a duplicate of bug 1193742 ***