Cannot start Plasma (KDE-Dev, Unstable)

For a couple of weeks on KDE-Dev (Unstable).

  • I enter my password in SDDM
  • I see the spinner
  • A dialog box appears saying kded5 needs my KDE Wallet Password
  • I enter it and eventually I see my cursor, but the spinner stops.
  • I can ctrl alt f4 and login to a tty and sudo pacman -Syyu so I know my wireless got activated

When I

$ plasmashell
qt.qpa.xcb: could not connect to display 
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: wayland-org.kde.kwin.qpa, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.
  Kernel: 5.9.14-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0 
  parameters: BOOT_IMAGE=/boot/vmlinuz-5.9-x86_64 
  root=UUID=5d6d64f6-19a9-4612-a6bb-4a61c7d62775 rw udev.log_priority=3 
  Console: tty 4 DM: SDDM Distro: Manjaro Linux 
  Type: Laptop System: Hewlett-Packard product: HP EliteBook 8440p v: N/A 
  serial: <filter> Chassis: type: 10 serial: <filter> 
  Mobo: Hewlett-Packard model: 172A v: KBC Version 30.30 serial: <filter> 
  BIOS: Hewlett-Packard v: 68CCU Ver. F.0E date: 08/23/2010 
  ID-1: BAT0 charge: 31.4 Wh condition: 31.4/56.6 Wh (56%) volts: 12.3/11.1 
  model: Hewlett-Packard Primary type: Li-ion serial: <filter> status: Full 
  Info: Dual Core model: Intel Core i7 M 620 bits: 64 type: MT MCP 
  arch: Nehalem family: 6 model-id: 25 (37) stepping: 5 microcode: 7 
  L2 cache: 4096 KiB 
  flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 21294 
  Speed: 1464 MHz min/max: 1199/2667 MHz boost: enabled Core speeds (MHz): 
  1: 1464 2: 1463 3: 1463 4: 1463 
  Vulnerabilities: Type: itlb_multihit status: KVM: VMX disabled 
  Type: l1tf 
  mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable 
  Type: mds 
  status: Vulnerable: Clear CPU buffers attempted, no microcode; SMT vulnerable 
  Type: meltdown mitigation: PTI 
  Type: spec_store_bypass 
  mitigation: Speculative Store Bypass disabled via prctl and seccomp 
  Type: spectre_v1 
  mitigation: usercopy/swapgs barriers and __user pointer sanitization 
  Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional, 
  IBRS_FW, STIBP: conditional, RSB filling 
  Type: srbds status: Not affected 
  Type: tsx_async_abort status: Not affected 
  Device-1: Intel Core Processor Integrated Graphics vendor: Hewlett-Packard 
  driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:0046 
  Device-2: Chicony HP Webcam [2 MP Macro] type: USB driver: uvcvideo 
  bus ID: 1-1.5:5 chip ID: 04f2:b15e 
  Display: server: 1.20.10 driver: intel unloaded: modesetting 
  alternate: fbdev,vesa tty: 200x56 
  Message: Advanced graphics data unavailable in console. Try -G --display 
  Device-1: Intel 5 Series/3400 Series High Definition Audio 
  vendor: Hewlett-Packard driver: snd_hda_intel v: kernel bus ID: 00:1b.0 
  chip ID: 8086:3b56 
  Sound Server: ALSA v: k5.9.14-1-MANJARO 
  Device-1: Intel 82577LM Gigabit Network vendor: Hewlett-Packard 
  driver: e1000e v: kernel port: 5020 bus ID: 00:19.0 chip ID: 8086:10ea 
  IF: enp0s25 state: down mac: <filter> 
  Device-2: Intel Centrino Ultimate-N 6300 driver: iwlwifi v: kernel 
  port: 5000 bus ID: 43:00.0 chip ID: 8086:4238 
  IF: wlo1 state: up mac: <filter> 
  Local Storage: total: 232.89 GiB used: 12.49 GiB (5.4%) 
  SMART Message: Unable to run smartctl. Root privileges required. 
  ID-1: /dev/sda vendor: Toshiba model: MK2556GSY size: 232.89 GiB block size: 
  physical: 512 B logical: 512 B speed: 3.0 Gb/s rotation: 7200 rpm 
  serial: <filter> rev: 3C scheme: MBR 
  ID-1: / raw size: 116.09 GiB size: 113.77 GiB (98.00%) 
  used: 12.49 GiB (11.0%) fs: ext4 dev: /dev/sda4 
  Alert: No Swap data was found. 
  System Temperatures: cpu: 35.0 C mobo: 0.0 C 
  Fan Speeds (RPM): N/A 
  Processes: 151 Uptime: 11m wakeups: 1 Memory: 3.64 GiB 
  used: 439.6 MiB (11.8%) Init: systemd v: 247 Compilers: gcc: 10.2.0 
  Packages: pacman: 1111 lib: 349 flatpak: 0 Shell: Bash v: 5.1.0 
  running in: tty 4 inxi: 3.1.09

Did you?
sudo pacman -Syyu libxcb lib32-libxcb qt5-base

1 Like

Thank you. Pacman gave me a warning that all three were up-to-date, re-installing.
I selected Yes (the default), and there were no errors downloading and installing.
I rebooted, but the same symptoms as before.