Sometimes hang on login

I am using Manjaro KDE:

System: Host: Workstation Kernel: 5.6.19-2-MANJARO x86_64 bits: 64 compiler: gcc v: 10.1.0
parameters: BOOT_IMAGE=/vmlinuz-5.6-x86_64 root=UUID=2e971b07-684c-474b-9db2-2848f30dc492 rw quiet apparmor=1
security=apparmor udev.log_priority=3
Desktop: KDE Plasma 5.19.3 tk: Qt 5.15.0 wm: kwin_x11 dm: SDDM Distro: Manjaro Linux
Machine: Type: Server System: Supermicro product: X10SRA v: 0123456789 serial: Chassis: type: 17 v: 0123456789
serial:
Mobo: Supermicro model: X10SRA v: 1.01 serial: UEFI: American Megatrends v: 2.1a date: 10/24/2018
CPU: Topology: 6-Core model: Intel Core i7-6800K bits: 64 type: MT MCP arch: Broadwell family: 6 model-id: 4F (79)
stepping: 1 microcode: B000038 L2 cache: 15.0 MiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 81628
Speed: 1458 MHz min/max: 1200/3800 MHz Core speeds (MHz): 1: 2112 2: 1394 3: 1326 4: 1666 5: 1387 6: 1261 7: 1651
8: 1672 9: 2515 10: 1282 11: 1415 12: 1296
Vulnerabilities: Type: itlb_multihit status: KVM: Split huge pages
Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable
Type: mds mitigation: Clear CPU buffers; 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 mitigation: Clear CPU buffers; SMT vulnerable
Graphics: Device-1: NVIDIA GM204 [GeForce GTX 970] vendor: CardExpert driver: nouveau v: kernel bus ID: 02:00.0
chip ID: 10de:13c2
Display: x11 server: X.Org 1.20.8 driver: nouveau unloaded: modesetting alternate: fbdev,nv,vesa
compositor: kwin_x11 resolution: 2560x1440~60Hz
OpenGL: renderer: NV124 v: 4.3 Mesa 20.1.3 direct render: Yes
Audio: Device-1: Intel C610/X99 series HD Audio vendor: Super Micro driver: snd_hda_intel v: kernel bus ID: 00:1b.0
chip ID: 8086:8d20
Device-2: NVIDIA GM204 High Definition Audio vendor: CardExpert driver: snd_hda_intel v: kernel bus ID: 02:00.1
chip ID: 10de:0fbb
Sound Server: ALSA v: k5.6.19-2-MANJARO
Network: Device-1: Intel I210 Gigabit Network vendor: Super Micro driver: igb v: 5.6.0-k port: d000 bus ID: 04:00.0
chip ID: 8086:1533
IF: eno1 state: down mac:
Device-2: Intel I210 Gigabit Network vendor: Super Micro driver: igb v: 5.6.0-k port: c000 bus ID: 05:00.0
chip ID: 8086:1533
IF: eno2 state: up speed: 1000 Mbps duplex: full mac:
Drives: Local Storage: total: 4.57 TiB used: 1.08 TiB (23.7%)
ID-1: /dev/sda vendor: Samsung model: SSD 850 PRO 512GB size: 476.94 GiB block size: physical: 512 B logical: 512 B
speed: 6.0 Gb/s serial: rev: 4B6Q scheme: GPT
ID-2: /dev/sdb vendor: Samsung model: SSD 850 PRO 512GB size: 476.94 GiB block size: physical: 512 B logical: 512 B
speed: 6.0 Gb/s serial: rev: 4B6Q scheme: GPT
ID-3: /dev/sdc vendor: Western Digital model: WD4003FZEX-00Z4SA0 size: 3.64 TiB block size: physical: 4096 B
logical: 512 B speed: 6.0 Gb/s rotation: 7200 rpm serial: rev: 1A01 scheme: GPT
Partition: ID-1: / raw size: 100.00 GiB size: 97.93 GiB (97.93%) used: 7.67 GiB (7.8%) fs: ext4 dev: /dev/sda3
ID-2: /boot raw size: 1024.0 MiB size: 975.9 MiB (95.30%) used: 101.4 MiB (10.4%) fs: ext4 dev: /dev/sda1
ID-3: /home raw size: 200.00 GiB size: 195.86 GiB (97.93%) used: 14.57 GiB (7.4%) fs: ext4 dev: /dev/sda4
ID-4: /var raw size: 143.93 GiB size: 140.67 GiB (97.74%) used: 1.84 GiB (1.3%) fs: ext4 dev: /dev/sda5
ID-5: swap-1 size: 32.00 GiB used: 0 KiB (0.0%) fs: swap swappiness: 60 (default) cache pressure: 100 (default)
dev: /dev/sda2
Sensors: System Temperatures: cpu: 21.0 C mobo: N/A gpu: nouveau temp: 34 C
Fan Speeds (RPM): N/A gpu: nouveau fan: 450
Info: Processes: 263 Uptime: 10m Memory: 31.24 GiB used: 1.58 GiB (5.1%) Init: systemd v: 245 Compilers: gcc: 10.1.0
Shell: bash v: 5.0.18 running in: konsole inxi: 3.0.37

The system sometimes hangs after I try to login (I type username and password).

systemd-analyze blame

After it hangs, obviously :smiley:

Could be linked to the NetworkManager.

Here is a workaround:

see these topic

I have solved the problem by installing the Nvidia driver (not nouveau).

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