Login loop on rebooting (Gnome)

When trying to login to Gnome desktop environment after either booting or rebooting i find myself stuck in a login loop.

I am presented with my name.
I click on the icon and enter my password.
Screen goes black, cursor disappears as normal.
Cursor then reappears, then i’m presented with normal login screen again.

when coming from either suspend or locking the screen it works just fine.

Fortunately so far i have been able to switch off and then boot to enable a successful login. Reboot so far does not seem to be able to get me in.

My system is fully up to date, the problem seems to have crept up after installing updates and restarting. Could be coincidence.

After checking other (old) threads there was a suggestion to check some logs.

  ` journalctl /usr/bin/gnome-shell`

Gave only logs from august. Nothing recent at all.

`journalctl /usr/bin/gnome-session`

Was empty.

`less /var/log/Xorg.0.log`

Was at least a few hundred lines long, and ive no idea what im looking for in it.
all help gratefully received.

check then
boot current

sudo journalctl -b0 

boot before

sudo journalctl -b -1 
/ >>> sudo journalctl -b0                                                                                                                                                   
[sudo] password for benjamin: 
-- Journal begins at Mon 2020-08-17 22:04:47 BST, ends at Thu 2021-04-29 19:24:40 BST. --
Apr 29 11:25:46 benjamin-inspiron7570 kernel: microcode: microcode updated early to revision 0xe0, date = 2020-06-17
Apr 29 11:25:46 benjamin-inspiron7570 kernel: Linux version 5.10.32-1-MANJARO (builduser@LEGION) (gcc (GCC) 10.2.0, GNU ld (GNU Binutils) 2.36.1) #1 SMP Wed Apr 21 14:54:10>
Apr 29 11:25:46 benjamin-inspiron7570 kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-5.10-x86_64 root=UUID=2d55ee99-fce9-4bf8-9a14-fbb4a98d7482 rw quiet udev.log_priority=3
Apr 29 11:25:46 benjamin-inspiron7570 kernel: x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
Apr 29 11:25:46 benjamin-inspiron7570 kernel: x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
Apr 29 11:25:46 benjamin-inspiron7570 kernel: x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
Apr 29 11:25:46 benjamin-inspiron7570 kernel: x86/fpu: Supporting XSAVE feature 0x008: 'MPX bounds registers'
Apr 29 11:25:46 benjamin-inspiron7570 kernel: x86/fpu: Supporting XSAVE feature 0x010: 'MPX CSR'
Apr 29 11:25:46 benjamin-inspiron7570 kernel: x86/fpu: xstate_offset[2]:  576, xstate_sizes[2]:  256
Apr 29 11:25:46 benjamin-inspiron7570 kernel: x86/fpu: xstate_offset[3]:  832, xstate_sizes[3]:   64
Apr 29 11:25:46 benjamin-inspiron7570 kernel: x86/fpu: xstate_offset[4]:  896, xstate_sizes[4]:   64
Apr 29 11:25:46 benjamin-inspiron7570 kernel: x86/fpu: Enabled xstate features 0x1f, context size is 960 bytes, using 'compacted' format.
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-provided physical RAM map:
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000000000000-0x0000000000057fff] usable
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000000058000-0x0000000000058fff] reserved
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000000059000-0x000000000009efff] usable
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000000009f000-0x00000000000fffff] reserved
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000000100000-0x00000000807e7fff] usable
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000807e8000-0x00000000807e8fff] ACPI NVS
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000807e9000-0x00000000807e9fff] reserved
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000807ea000-0x000000008eeaefff] usable
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008eeaf000-0x000000008f256fff] reserved
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008f257000-0x000000008f299fff] ACPI data
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008f29a000-0x000000008f93ffff] ACPI NVS
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008f940000-0x000000008ff20fff] reserved
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008ff21000-0x000000008fffdfff] type 20
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008fffe000-0x000000008fffefff] usable
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008ffff000-0x0000000097ffffff] reserved
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000098000000-0x00000000985fffff] usable
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000098600000-0x000000009e7fffff] reserved
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000e0000000-0x00000000efffffff] reserved
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000fe000000-0x00000000fe010fff] reserved
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] reserved
Apr 29 11:25:46 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000100000000-0x00000004607fffff] usable
Apr 29 11:25:46 benjamin-inspiron7570 kernel: NX (Execute Disable) protection: active
Apr 29 11:25:46 benjamin-inspiron7570 kernel: efi: EFI v2.40 by American Megatrends




~ >>> sudo journalctl -b -1                                                                                                                                                 
[sudo] password for benjamin: 
-- Journal begins at Mon 2020-08-17 22:04:47 BST, ends at Thu 2021-04-29 19:26:12 BST. --
Apr 29 11:24:16 benjamin-inspiron7570 kernel: microcode: microcode updated early to revision 0xe0, date = 2020-06-17
Apr 29 11:24:16 benjamin-inspiron7570 kernel: Linux version 5.10.32-1-MANJARO (builduser@LEGION) (gcc (GCC) 10.2.0, GNU ld (GNU Binutils) 2.36.1) #1 SMP Wed Apr 21 14:54:10>
Apr 29 11:24:16 benjamin-inspiron7570 kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-5.10-x86_64 root=UUID=2d55ee99-fce9-4bf8-9a14-fbb4a98d7482 rw quiet udev.log_priority=3
Apr 29 11:24:16 benjamin-inspiron7570 kernel: x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
Apr 29 11:24:16 benjamin-inspiron7570 kernel: x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
Apr 29 11:24:16 benjamin-inspiron7570 kernel: x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
Apr 29 11:24:16 benjamin-inspiron7570 kernel: x86/fpu: Supporting XSAVE feature 0x008: 'MPX bounds registers'
Apr 29 11:24:16 benjamin-inspiron7570 kernel: x86/fpu: Supporting XSAVE feature 0x010: 'MPX CSR'
Apr 29 11:24:16 benjamin-inspiron7570 kernel: x86/fpu: xstate_offset[2]:  576, xstate_sizes[2]:  256
Apr 29 11:24:16 benjamin-inspiron7570 kernel: x86/fpu: xstate_offset[3]:  832, xstate_sizes[3]:   64
Apr 29 11:24:16 benjamin-inspiron7570 kernel: x86/fpu: xstate_offset[4]:  896, xstate_sizes[4]:   64
Apr 29 11:24:16 benjamin-inspiron7570 kernel: x86/fpu: Enabled xstate features 0x1f, context size is 960 bytes, using 'compacted' format.
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-provided physical RAM map:
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000000000000-0x0000000000057fff] usable
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000000058000-0x0000000000058fff] reserved
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000000059000-0x000000000009efff] usable
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000000009f000-0x00000000000fffff] reserved
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000000100000-0x00000000807e7fff] usable
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000807e8000-0x00000000807e8fff] ACPI NVS
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000807e9000-0x00000000807e9fff] reserved
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000807ea000-0x000000008eeaefff] usable
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008eeaf000-0x000000008f256fff] reserved
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008f257000-0x000000008f299fff] ACPI data
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008f29a000-0x000000008f93ffff] ACPI NVS
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008f940000-0x000000008ff20fff] reserved
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008ff21000-0x000000008fffdfff] type 20
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008fffe000-0x000000008fffefff] usable
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x000000008ffff000-0x0000000097ffffff] reserved
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000098000000-0x00000000985fffff] usable
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000098600000-0x000000009e7fffff] reserved
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000e0000000-0x00000000efffffff] reserved
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000fe000000-0x00000000fe010fff] reserved
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] reserved
Apr 29 11:24:16 benjamin-inspiron7570 kernel: BIOS-e820: [mem 0x0000000100000000-0x00000004607fffff] usable
lines 1-37

Your issue may be with GDM / Plymouth. See:

I tried installing plymouth, didnt fix it so i then uninstalled it.
Restarted and all i had was a terminal. from there i then followed

this link

to re install GDM.

This seems to have fixed it.