Can't login anymore after restart (after installing Wireshark)

Hello everybody,

I installed Wireshark some hours ago and suddenly experienced Firefox crashing constantly, so I restarted. After restart I’m greeted by GRUB (as usual) and I’m able to boot into Manjaro XFCE. I type in my password, the screen turns black for a second and I’m back at the XFCE login screen. The password is 100% correct - when I type in a wrong password on purpose I receive the respective error message stating that the password is wrong.

As mentioned in an additional post, I’m able to log in as root but not with my user.
I finally found a command I executed because I wasn’t able to use Wireshark before:
sudo chmod +x /usr/bin/dumpcap
Is this somethind that could be related to my login problem?

Here’s some additional info:

System:    12Kernel 5.9.16-1-MANJARO x86_64 12bits 64 12compiler gcc 12v 10.2.0 
           12parameters BOOT_IMAGE=/boot/vmlinuz-x86_64 lang=en_US keytable=us tz=UTC 
           misobasedir=manjaro misolabel=MANJARO_XFCE_2021 quiet systemd.show_status=1 apparmor=1 
           security=apparmor driver=free nouveau.modeset=1 i915.modeset=1 radeon.modeset=1 
           12Desktop Xfce 4.16.0 12tk Gtk 3.24.24 12info xfce4-panel 12wm xfwm4 12dm N/A 
           12Distro Manjaro Linux 12base Arch Linux 
12Machine:   12Type Desktop 12Mobo ASUSTeK 12model Z170 PRO GAMING 12v Rev X.0x 12serial <filter> 
           12UEFI American Megatrends 12v 3606 12date 02/22/2018 
12CPU:       12Info Quad Core 12model Intel Core i7-6700K 12socket LGA1151 12bits 64 12type MT MCP 
           12arch Skylake-S 12family 6 12model-id 5E (94) 12stepping 3 12microcode E2 12cache 12L1 256 KiB 
           12L2 8 MiB 12L3 8 MiB 
           12flags avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 12bogomips 64026 
           12Speed 800 MHz 12min/max 800/4200 MHz 12base/boost 4000/8300 12volts 1.2 V 12ext-clock 100 MHz 
           12Core speeds (MHz) 121 800 122 800 123 799 124 800 125 800 126 800 127 800 128 800 
           12Vulnerabilities 12Type itlb_multihit 12status KVM: VMX unsupported 
           12Type l1tf 12mitigation PTE Inversion 
           12Type mds 12mitigation Clear CPU buffers; SMT vulnerable 
           12Type meltdown 12mitigation PTI 
           12Type spec_store_bypass 
           12mitigation Speculative Store Bypass disabled via prctl and seccomp 
           12Type spectre_v1 12mitigation usercopy/swapgs barriers and __user pointer sanitization 
           12Type spectre_v2 12mitigation Full generic retpoline, IBPB: conditional, IBRS_FW, STIBP: 
           conditional, RSB filling 
           12Type srbds 12mitigation Microcode 
           12Type tsx_async_abort 12mitigation Clear CPU buffers; SMT vulnerable 
12Graphics:  12Device-1 NVIDIA GM204 [GeForce GTX 970] 12vendor Micro-Star MSI 12driver nouveau 12v kernel 
           12alternate nvidia_drm,nvidia 12bus-ID 01:00.0 12chip-ID 10de:13c2 12class-ID 0300 
           12Display 12server X.Org 1.20.10 12driver 12loaded nvidia 12display-ID :0.0 12screens 1 
           12Screen-1 0 12s-res 2560x1440 12s-dpi 96 12s-size 677x381mm (26.7x15.0") 12s-diag 777mm (30.6") 
           12OpenGL 12renderer NV124 12v 4.3 Mesa 21.0.1 12direct render Yes 
12Audio:     12Device-1 Intel 100 Series/C230 Series Family HD Audio 12vendor ASUSTeK 
           12driver snd_hda_intel 12v kernel 12bus-ID 00:1f.3 12chip-ID 8086:a170 12class-ID 0403 
           12Device-2 NVIDIA GM204 High Definition Audio 12vendor Micro-Star MSI 12driver snd_hda_intel 
           12v kernel 12bus-ID 01:00.1 12chip-ID 10de:0fbb 12class-ID 0403 
           12Sound Server-1 ALSA 12v k5.9.16-1-MANJARO 12running yes 
           12Sound Server-2 sndio 12v N/A 12running no 
           12Sound Server-3 JACK 12v 0.125.0 12running no 
           12Sound Server-4 PulseAudio 12v 14.2 12running yes 
           12Sound Server-5 PipeWire 12v 0.3.24 12running no 
12Network:   12Device-1 Intel Ethernet I219-V 12vendor ASUSTeK 12driver e1000e 12v kernel 12port f000 
           12bus-ID 00:1f.6 12chip-ID 8086:15b8 12class-ID 0200 
           12IF enp0s31f6 12state up 12speed 1000 Mbps 12duplex full 12mac <filter> 
12Bluetooth: 12Device-1 Cambridge Silicon Radio Bluetooth Dongle (HCI mode) 12type USB 12driver btusb 
           12v 0.8 12bus-ID 1-2:2 12chip-ID 0a12:0001 12class-ID e001 
           12Report This feature requires one of these tools: hciconfig/bt-adapter 
12Drives:    12Local Storage 12total 2.49 TiB 12used 73.77 GiB (2.9%) 
           12SMART Message Required tool smartctl not installed. Check --recommends 
           12ID-1 /dev/nvme0n1 12maj-min 259:0 12vendor Corsair 12model Force MP510 12size 894.25 GiB 
           12block-size 12physical 512 B 12logical 512 B 12speed 31.6 Gb/s 12lanes 4 12rotation SSD 
           12serial <filter> 12rev ECFM22.5 12temp 32.9 C 
           12ID-2 /dev/sda 12maj-min 8:0 12vendor Samsung 12model SSD 840 EVO 250GB 12size 232.89 GiB 
           12block-size 12physical 512 B 12logical 512 B 12speed 6.0 Gb/s 12rotation SSD 12serial <filter> 
           12rev BB6Q 
           12ID-3 /dev/sdb 12maj-min 8:16 12vendor Samsung 12model SSD 850 EVO 500GB 12size 465.76 GiB 
           12block-size 12physical 512 B 12logical 512 B 12speed 6.0 Gb/s 12rotation SSD 12serial <filter> 
           12rev 2B6Q 
           12ID-4 /dev/sdc 12maj-min 8:32 12vendor Seagate 12model ST1000DM003-1CH162 12size 931.51 GiB 
           12block-size 12physical 4096 B 12logical 512 B 12speed 6.0 Gb/s 12serial <filter> 12rev CC47 
           12ID-5 /dev/sdd 12maj-min 8:48 12type USB 12vendor SanDisk 12model Ultra 12size 28.97 GiB 
           12block-size 12physical 512 B 12logical 512 B 12serial <filter> 12rev 1.00 
12Partition: 12ID-1 / 12raw-size 885.45 GiB 12size 870.55 GiB (98.32%) 12used 73.77 GiB (8.5%) 12fs ext4 
           12block-size 4096 B 12dev /dev/nvme0n1p1 12maj-min 259:1 
12Swap:      12Alert No Swap data was found. 
12Sensors:   12System Temperatures 12cpu 29.8 C 12mobo 27.8 C 12gpu nouveau 12temp 46.0 C 
           12Fan Speeds (RPM) N/A 12gpu nouveau 12fan 0 
12Info:      12Processes 264 12Uptime 11m 12wakeups 0 12Memory 31.31 GiB 12used 2.15 GiB (6.9%) 12Init systemd 
           12v 247 12tool systemctl 12Compilers 12gcc 10.2.0 12clang 11.1.0 12Packages 12pacman 1351 12lib 407 
           12flatpak 0 12Client Unknown Client: systemd 12inxi 3.3.03 

Thanks in advance!

Out of curiosity I tested if I could log in as root and this works.
So something with my user permissions might be wrong? Does somebody have an idea what I could try to fix this?

And here is a command I executed because I wasn’t able to use Wireshark before:
sudo chmod +x /usr/bin/dumpcap
Could this be related to my login issues?

Well, I “fixed” it by restoring a backup from yesterday evening.
Still I’m interested in knowing what happened here to be able to fix this properly or prevent it in the future. Thanks.

Inspecting some logs (journalctl) could have given you some hint/clue. Without further information you can’t expect other people to guess what went wrong.