After last update X wont start

Hi!

I am using the Cinnamon DE. After last update (today: 2022.08.23.) X wont start.
Alt+Ctrl+F2 works for using console.
What can I do to resolve this problem?
Thanks.

Starting with this post:

Provide relevant errors & provide system info so users can provide assistance for your specific case.

inxi -v7azy
System:
  Kernel: 5.15.41-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 12.1.0
    parameters: BOOT_IMAGE=/boot/vmlinuz-5.15-x86_64
    root=UUID=8ee88a05-f1e2-466b-a466-2618187b792f rw quiet apparmor=1
    security=apparmor resume=UUID=0a149764-a23c-42ac-a17f-b126100b0a6f
    udev.log_priority=3
  Desktop: Cinnamon v: 5.2.7 tk: GTK v: 3.24.34 vt: 7 dm: LightDM v: 1.30.0
    Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Laptop System: Micro-Star product: GF63 Thin 10SCXR v: REV:1.0
    serial: <superuser required> Chassis: type: 10 serial: <superuser required>
  Mobo: Micro-Star model: MS-16R4 v: REV:1.0 serial: <superuser required>
    UEFI: American Megatrends v: E16R4IMS.105 date: 04/17/2020
Battery:
  ID-1: BAT1 charge: 47.6 Wh (100.0%) condition: 47.6/51.3 Wh (92.8%)
    volts: 12.7 min: 11.4 model: MSI Corp. MS-16R4 type: Li-ion serial: N/A
    status: full
  Device-1: hidpp_battery_0
    model: Logitech M720 Triathlon Multi-Device Mouse serial: <filter>
    charge: 100% (should be ignored) rechargeable: yes status: discharging
Memory:
  RAM: total: 31.17 GiB used: 5.39 GiB (17.3%)
  RAM Report:
    permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: Intel Core i7-10750H bits: 64 type: MT MCP arch: Comet Lake
    family: 6 model-id: 0xA5 (165) stepping: 2 microcode: 0xF0
  Topology: cpus: 1x cores: 6 tpc: 2 threads: 12 smt: enabled cache:
    L1: 384 KiB desc: d-6x32 KiB; i-6x32 KiB L2: 1.5 MiB desc: 6x256 KiB
    L3: 12 MiB desc: 1x12 MiB
  Speed (MHz): avg: 1102 high: 3966 min/max: 800/5000 scaling:
    driver: intel_pstate governor: powersave cores: 1: 800 2: 800 3: 800 4: 800
    5: 800 6: 800 7: 800 8: 1265 9: 3966 10: 800 11: 800 12: 800
    bogomips: 62431
  Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat
    arch_capabilities arch_perfmon art avx avx2 bmi1 bmi2 bts clflush clflushopt
    cmov constant_tsc cpuid cpuid_fault cx16 cx8 de ds_cpl dtes64 dtherm dts
    epb ept ept_ad erms est f16c flexpriority flush_l1d fma fpu fsgsbase fxsr
    ht hwp hwp_act_window hwp_epp hwp_notify ibpb ibrs ibrs_enhanced ida
    intel_pt invpcid invpcid_single lahf_lm lm mca mce md_clear mmx monitor
    movbe mpx msr mtrr nonstop_tsc nopl nx ospke pae pat pbe pcid pclmulqdq
    pdcm pdpe1gb pebs pge pku pln pni popcnt pse pse36 pts rdrand rdseed
    rdtscp rep_good sdbg sep smap smep ss ssbd sse sse2 sse4_1 sse4_2 ssse3
    stibp syscall tm tm2 tpr_shadow tsc tsc_adjust tsc_deadline_timer vme vmx
    vnmi vpid x2apic xgetbv1 xsave xsavec xsaveopt xsaves xtopology xtpr
  Vulnerabilities:
  Type: itlb_multihit status: KVM: VMX disabled
  Type: l1tf status: Not affected
  Type: mds status: Not affected
  Type: meltdown status: Not affected
  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 status: Vulnerable: eIBRS with unprivileged eBPF
  Type: srbds status: Not affected
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: Intel CometLake-H GT2 [UHD Graphics] vendor: Micro-Star MSI
    driver: i915 v: kernel ports: active: HDMI-A-2 off: eDP-1
    empty: DP-1,HDMI-A-1 bus-ID: 00:02.0 chip-ID: 8086:9bc4 class-ID: 0300
  Device-2: NVIDIA TU117M vendor: Micro-Star MSI driver: nvidia v: 510.73.05
    alternate: nouveau,nvidia_drm non-free: 515.xx+
    status: current (as of 2022-05) arch: Turing pcie: gen: 1 speed: 2.5 GT/s
    lanes: 16 link-max: gen: 3 speed: 8 GT/s bus-ID: 01:00.0
    chip-ID: 10de:1f99 class-ID: 0302
  Display: x11 server: X.Org v: 21.1.3 driver: X: loaded: modesetting,nvidia
    gpu: i915 display-ID: :0 screens: 1
  Screen-1: 0 s-res: 1920x1200 s-dpi: 96 s-size: 508x318mm (20.00x12.52")
    s-diag: 599mm (23.6")
  Monitor-1: HDMI-A-2 mapped: HDMI-1-2 pos: primary model: Samsung S24E650
    serial: <filter> built: 2016 res: 1920x1200 hz: 60 dpi: 94 gamma: 1.2
    size: 518x324mm (20.39x12.76") diag: 611mm (24.1") ratio: 16:10 modes:
    max: 1920x1200 min: 640x480
  Monitor-2: eDP-1 mapped: eDP-1-1 note: disabled model: AU Optronics 0xaf90
    built: 2020 res: 1920x1200 dpi: 142 gamma: 1.2 size: 344x193mm (13.54x7.6")
    diag: 394mm (15.5") ratio: 16:9 modes: 1920x1080
  OpenGL: renderer: NVIDIA GeForce GTX 1650 with Max-Q Design/PCIe/SSE2
    v: 4.6.0 NVIDIA 510.73.05 direct render: Yes
Audio:
  Device-1: Intel Comet Lake PCH cAVS vendor: Micro-Star MSI
    driver: snd_hda_intel v: kernel alternate: snd_soc_skl,snd_sof_pci_intel_cnl
    bus-ID: 00:1f.3 chip-ID: 8086:06c8 class-ID: 0403
  Device-2: Corsair VOID ELITE USB Gaming Headset type: USB
    driver: hid-generic,snd-usb-audio,usbhid bus-ID: 1-5:3 chip-ID: 1b1c:0a52
    class-ID: 0300 serial: <filter>
  Sound Server-1: ALSA v: k5.15.41-1-MANJARO running: yes
  Sound Server-2: JACK v: 1.9.21 running: no
  Sound Server-3: PulseAudio v: 15.0 running: yes
  Sound Server-4: PipeWire v: 0.3.51 running: yes
Network:
  Device-1: Intel Comet Lake PCH CNVi WiFi driver: iwlwifi v: kernel
    bus-ID: 00:14.3 chip-ID: 8086:06f0 class-ID: 0280
  IF: wlo1 state: up mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
    broadcast: <filter>
  IP v6: <filter> type: noprefixroute scope: link
  Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
    vendor: Micro-Star MSI driver: r8169 v: kernel pcie: gen: 1 speed: 2.5 GT/s
    lanes: 1 port: 3000 bus-ID: 03:00.0 chip-ID: 10ec:8168 class-ID: 0200
  IF: enp3s0 state: down mac: <filter>
  WAN IP: <filter>
Bluetooth:
  Device-1: Intel AX201 Bluetooth type: USB driver: btusb v: 0.8
    bus-ID: 1-14:8 chip-ID: 8087:0026 class-ID: e001
  Report: rfkill ID: hci0 rfk-id: 2 state: down bt-service: enabled,running
    rfk-block: hardware: no software: yes address: see --recommends
Logical:
  Message: No logical block device data found.
  Device-1: luks-3b947b0d-6cc7-4cd7-a9b5-de0ace40fdf0 maj-min: 254:0
    type: LUKS dm: dm-0 size: 238.42 GiB
  Components:
  p-1: sda2 maj-min: 8:2 size: 238.42 GiB
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 1.38 TiB used: 236.51 GiB (16.8%)
  SMART Message: Required tool smartctl not installed. Check --recommends
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Kingston
    model: RBUSNS8154P3512GJ5 size: 476.94 GiB block-size: physical: 512 B
    logical: 512 B speed: 15.8 Gb/s lanes: 2 type: SSD serial: <filter>
    rev: E8FK12.D temp: 46.9 C scheme: GPT
  ID-2: /dev/sda maj-min: 8:0 vendor: Seagate model: ST1000LM048-2E7172
    size: 931.51 GiB block-size: physical: 4096 B logical: 512 B speed: 6.0 Gb/s
    type: HDD rpm: 5400 serial: <filter> rev: 0001 scheme: GPT
  Message: No optical or floppy data found.
Partition:
  ID-1: / raw-size: 467.84 GiB size: 459.43 GiB (98.20%)
    used: 21.84 GiB (4.8%) fs: ext4 dev: /dev/nvme0n1p2 maj-min: 259:2
    label: N/A uuid: 8ee88a05-f1e2-466b-a466-2618187b792f
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
    used: 288 KiB (0.1%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1
    label: NO_LABEL uuid: C0EC-031C
  ID-3: /mnt/misc_disk raw-size: 684 GiB size: 672.19 GiB (98.27%)
    used: 192.14 GiB (28.6%) fs: ext4 dev: /dev/sda4 maj-min: 8:4 label: misc
    uuid: f417ae0c-6b9f-45d7-affb-827b6ad26286
  ID-4: /run/media/molnari/8e02e87e-1c76-4796-8bd3-dd7f27bdf843
    raw-size: 238.42 GiB size: 233.62 GiB (97.99%) used: 22.53 GiB (9.6%)
    fs: ext4 dev: /dev/dm-0 maj-min: 254:0
    mapped: luks-3b947b0d-6cc7-4cd7-a9b5-de0ace40fdf0 label: N/A
    uuid: 8e02e87e-1c76-4796-8bd3-dd7f27bdf843
Swap:
  Kernel: swappiness: 60 (default) cache-pressure: 100 (default)
  ID-1: swap-1 type: partition size: 8.8 GiB used: 0 KiB (0.0%) priority: -2
    dev: /dev/nvme0n1p3 maj-min: 259:3 label: swap
    uuid: 0a149764-a23c-42ac-a17f-b126100b0a6f
Unmounted:
  ID-1: /dev/sda1 maj-min: 8:1 size: 300 MiB fs: vfat label: N/A
    uuid: FF3C-41DF
  ID-2: /dev/sda3 maj-min: 8:3 size: 8.8 GiB fs: swap label: N/A
    uuid: 42569afe-0e3a-49ef-9c01-93d866fdac4a
USB:
  Hub-1: 1-0:1 info: Hi-speed hub with single TT ports: 16 rev: 2.0
    speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Hub-2: 1-3:2 info: Huasheng USB2.0 HUB ports: 4 rev: 2.0 speed: 480 Mb/s
    power: 100mA chip-ID: 214b:7250 class-ID: 0900
  Hub-3: 1-3.1:4 info: Huasheng USB2.0 HUB ports: 4 rev: 2.0 speed: 480 Mb/s
    power: 100mA chip-ID: 214b:7250 class-ID: 0900
  Device-1: 1-3.1.1:7 info: Logitech Unifying Receiver
    type: Keyboard,Mouse,HID driver: logitech-djreceiver,usbhid interfaces: 3
    rev: 2.0 speed: 12 Mb/s power: 98mA chip-ID: 046d:c52b class-ID: 0300
  Device-2: 1-3.3:5 info: Logitech Keyboard K120 type: Keyboard,HID
    driver: hid-generic,usbhid interfaces: 2 rev: 1.1 speed: 1.5 Mb/s
    power: 90mA chip-ID: 046d:c31c class-ID: 0300
  Device-3: 1-5:3 info: Corsair VOID ELITE USB Gaming Headset
    type: Audio,HID driver: hid-generic,snd-usb-audio,usbhid interfaces: 4
    rev: 2.0 speed: 12 Mb/s power: 100mA chip-ID: 1b1c:0a52 class-ID: 0300
    serial: <filter>
  Device-4: 1-14:8 info: Intel AX201 Bluetooth type: Bluetooth driver: btusb
    interfaces: 2 rev: 2.0 speed: 12 Mb/s power: 100mA chip-ID: 8087:0026
    class-ID: e001
  Hub-4: 2-0:1 info: Super-speed hub ports: 8 rev: 3.1 speed: 10 Gb/s
    chip-ID: 1d6b:0003 class-ID: 0900
Sensors:
  System Temperatures: cpu: 58.0 C pch: 55.0 C mobo: N/A gpu: nvidia
    temp: 53 C
  Fan Speeds (RPM): N/A
Info:
  Processes: 366 Uptime: 1h 8m wakeups: 3 Init: systemd v: 250 tool: systemctl
  Compilers: gcc: 12.1.0 clang: 13.0.1 Packages: pacman: 1278 lib: 435
  flatpak: 0 Shell: Bash v: 5.1.16 running-in: gnome-terminal inxi: 3.3.16

Relevant error:
black screen of nothing with blinking cursor.
I hope the above is enough.
Let me know if needs more or other specific information.
Notice that, the information originated from my backup system, so the HDD info is not valid.
Also the software versions are older.
Thanks.

:mag_right:

Amazing thing happened!
Today morning the system worked. For the record here is the journalctl result:

aug 23 18:12:08 mchdd kernel: x86/cpu: SGX disabled by BIOS.
aug 23 18:12:08 mchdd kernel: Spectre V2 : WARNING: Unprivileged eBPF is enabled with eIBRS on, data leaks possible via Spectre v2 BHB attacks!
aug 23 18:12:08 mchdd kernel: nvme nvme0: failed to set APST feature (2)
aug 23 18:12:24 mchdd kernel: usb 1-5: 1:1: cannot get freq at ep 0x81
aug 23 18:12:24 mchdd kernel: usb 1-5: 2:1: cannot get freq at ep 0x1
aug 23 18:12:38 mchdd kernel: NVRM: loading NVIDIA UNIX x86_64 Kernel Module  515.65.01  Wed Jul 20 14:00:58 UTC 2022
aug 23 18:12:39 mchdd kernel: nvidia 0000:01:00.0: can't change power state from D3cold to D0 (config space inaccessible)
aug 23 18:12:39 mchdd kernel: [drm:nv_drm_load [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed to allocate NvKmsKapiDevice
aug 23 18:12:39 mchdd kernel: [drm:nv_drm_probe_devices [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed to register device
aug 23 18:12:39 mchdd kernel: nvidia 0000:01:00.0: can't change power state from D3cold to D0 (config space inaccessible)
aug 23 18:12:40 mchdd kernel: nvidia 0000:01:00.0: can't change power state from D3cold to D0 (config space inaccessible)
aug 23 18:12:40 mchdd kernel: nvidia 0000:01:00.0: can't change power state from D3cold to D0 (config space inaccessible)
aug 23 18:12:40 mchdd kernel: nvidia 0000:01:00.0: can't change power state from D3cold to D0 (config space inaccessible)
aug 23 18:12:57 mchdd systemd[1]: Failed to start Light Display Manager.
░░ Subject: A start job for unit lightdm.service has failed
░░ Defined-By: systemd
░░ Support: https://forum.manjaro.org/c/support
░░ 
░░ A start job for unit lightdm.service has finished with a failure.
░░ 
░░ The job identifier is 1754 and the job result is failed.
aug 23 18:21:43 mchdd systemd-cryptsetup[1639]: Device luks-3b947b0d-6cc7-4cd7-a9b5-de0ace40fdf0 is still in use.
aug 23 18:21:43 mchdd systemd-cryptsetup[1639]: Failed to deactivate: Device or resource busy
aug 23 18:21:43 mchdd kernel: watchdog: watchdog0: watchdog did not stop!

If it came back to normal, there’s probably no need to proceed further.

But if you’re curious, you could try digging deeper.

journalctl --boot=-1 --unit=lightdm.service --no-pager

Here is the result:

aug 23 18:12:41 mchdd systemd[1]: Starting Light Display Manager...
aug 23 18:12:41 mchdd systemd[1]: Started Light Display Manager.
aug 23 18:12:50 mchdd systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
aug 23 18:12:50 mchdd systemd[1]: lightdm.service: Failed with result 'exit-code'.
aug 23 18:12:51 mchdd systemd[1]: lightdm.service: Scheduled restart job, restart counter is at 1.
aug 23 18:12:51 mchdd systemd[1]: Stopped Light Display Manager.
aug 23 18:12:51 mchdd systemd[1]: Starting Light Display Manager...
aug 23 18:12:51 mchdd systemd[1]: Started Light Display Manager.
aug 23 18:12:52 mchdd systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
aug 23 18:12:52 mchdd systemd[1]: lightdm.service: Failed with result 'exit-code'.
aug 23 18:12:52 mchdd systemd[1]: lightdm.service: Scheduled restart job, restart counter is at 2.
aug 23 18:12:52 mchdd systemd[1]: Stopped Light Display Manager.
aug 23 18:12:52 mchdd systemd[1]: Starting Light Display Manager...
aug 23 18:12:52 mchdd systemd[1]: Started Light Display Manager.
aug 23 18:12:53 mchdd systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
aug 23 18:12:53 mchdd systemd[1]: lightdm.service: Failed with result 'exit-code'.
aug 23 18:12:53 mchdd systemd[1]: lightdm.service: Scheduled restart job, restart counter is at 3.
aug 23 18:12:53 mchdd systemd[1]: Stopped Light Display Manager.
aug 23 18:12:53 mchdd systemd[1]: Starting Light Display Manager...
aug 23 18:12:53 mchdd systemd[1]: Started Light Display Manager.
aug 23 18:12:54 mchdd systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
aug 23 18:12:54 mchdd systemd[1]: lightdm.service: Failed with result 'exit-code'.
aug 23 18:12:54 mchdd systemd[1]: lightdm.service: Scheduled restart job, restart counter is at 4.
aug 23 18:12:54 mchdd systemd[1]: Stopped Light Display Manager.
aug 23 18:12:54 mchdd systemd[1]: Starting Light Display Manager...
aug 23 18:12:54 mchdd systemd[1]: Started Light Display Manager.
aug 23 18:12:56 mchdd systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
aug 23 18:12:56 mchdd systemd[1]: lightdm.service: Failed with result 'exit-code'.
aug 23 18:12:56 mchdd systemd[1]: lightdm.service: Scheduled restart job, restart counter is at 5.
aug 23 18:12:56 mchdd systemd[1]: Stopped Light Display Manager.
aug 23 18:12:56 mchdd systemd[1]: Starting Light Display Manager...
aug 23 18:12:56 mchdd systemd[1]: Started Light Display Manager.
aug 23 18:12:57 mchdd systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
aug 23 18:12:57 mchdd systemd[1]: lightdm.service: Failed with result 'exit-code'.
aug 23 18:12:57 mchdd systemd[1]: lightdm.service: Scheduled restart job, restart counter is at 6.
aug 23 18:12:57 mchdd systemd[1]: Stopped Light Display Manager.
aug 23 18:12:57 mchdd systemd[1]: lightdm.service: Start request repeated too quickly.
aug 23 18:12:57 mchdd systemd[1]: lightdm.service: Failed with result 'exit-code'.
aug 23 18:12:57 mchdd systemd[1]: Failed to start Light Display Manager.

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