memtest showing now errors I uploaded the results of ubuntu-bug:
cat /var/crash/_usr_lib_gdm3_gdm-session-worker.0.uploaded
0d1b7258-3816-11ec-ae83-fa163e102db1

Perhaps the stacktrace will help or perhaps warnings can be added if memory is 
suspected?
Thread 3 (Thread 0x7f9f50e77700 (LWP 1292)):
#0  0x00007f9f518eaaff in __GI___poll (fds=0x5565cc27c700, nfds=1, timeout=-1) 
at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
#1  0x00007f9f51bab36e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f51bab4a3 in g_main_context_iteration () at 
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f51bab4f1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f51bd4ad1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9f519d0609 in start_thread (arg=<optimized out>) at 
pthread_create.c:477
        ret = <optimized out>
        pd = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140322233874176, 
1304645551131517484, 140731730720206, 140731730720207, 140731730720352, 140
322233871936, -1358492822650691028, -1358491638588054996}, mask_was_saved = 
0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup
 = 0x0, canceltype = 0}}}
        not_first_call = 0
#6  0x00007f9f518f7293 in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 2 (Thread 0x7f9f4bfff700 (LWP 1293)):
#0  0x00007f9f518eaaff in __GI___poll (fds=0x5565cc294470, nfds=3, timeout=-1) 
at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
#1  0x00007f9f51bab36e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0

#2  0x00007f9f51bab6f3 in g_main_loop_run () at 
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f51e00f8a in  () at /lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f9f51bd4ad1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9f519d0609 in start_thread (arg=<optimized out>) at 
pthread_create.c:477
        ret = <optimized out>
        pd = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140322151593728, 
1304645551131517484, 140731730720638, 140731730720639, 140731730720784, 
140322151591488, -1358504028220366292, -1358491638588054996}, mask_was_saved = 
0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, 
canceltype = 0}}}
        not_first_call = 0
#6  0x00007f9f518f7293 in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 1 (Thread 0x7f9f513e9040 (LWP 1291)):
#0  0x00007f9f506256e7 in  () at /lib/x86_64-linux-gnu/security/pam_systemd.so
#1  0x00007f9f5062c02a in  () at /lib/x86_64-linux-gnu/security/pam_systemd.so
#2  0x00007f9f5061e279 in  () at /lib/x86_64-linux-gnu/security/pam_systemd.so
#3  0x00007f9f50623b6a in  () at /lib/x86_64-linux-gnu/security/pam_systemd.so
#4  0x00007f9f5063478a in  () at /lib/x86_64-linux-gnu/security/pam_systemd.so
#5  0x00007f9f506378be in pam_sm_close_session () at 
/lib/x86_64-linux-gnu/security/pam_systemd.so
#6  0x00007f9f51a1a056 in  () at /lib/x86_64-linux-gnu/libpam.so.0
#7  0x00005565cbf9b8e7 in  ()
#8  0x00005565cbf9b9a6 in  ()
#9  0x00007f9f51ba7338 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f9f51bab04e in g_main_context_dispatch () at 
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f9f51bab400 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f9f51bab6f3 in g_main_loop_run () at 
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00005565cbf92413 in  ()
#14 0x00007f9f517fc0b3 in __libc_start_main (main=0x5565cbf92290, argc=1, 
argv=0x7ffea8d18798, init=<optimized out>, fini=<optimized out>, 
rtld_fini=<optimized out>, stack_end=0x7ffea8d18788) at ../csu/libc-start.c:308
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {93895702292016, 
1304645551131517484, 93895702160560, 140731730724752, 0, 0, 
-1304256548182367700, -1358491932716506580}, mask_was_saved = 0}}, priv = {pad 
= {0x0, 0x0, 0x1, 0x7ffea8d18798}, data = {prev = 0x0, cleanup = 0x0, 
canceltype = 1}}}
        not_first_call = <optimized out>
#15 0x00005565cbf924de in  ()

== Title =================================
gdm-session-worker crashed with SIGSEGV


** Attachment added: "pic of memtest no errors"
   
https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1948704/+attachment/5536832/+files/IMG_0334.jpg

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1948704

Title:
  segfault with gnome-shell & gdm-session-worker

Status in gnome-shell package in Ubuntu:
  Incomplete

Bug description:
  Using Ubuntu 20.04.3 LTS with 5.11.0-38-generic #42~20.04.1-Ubuntu,
  gnome-shell/focal-updates,now 3.36.9-0ubuntu0.20.04.2 amd64 
[installed,automatic]
  gnome-shell/focal-security 3.36.4-1ubuntu1~20.04.2 amd64
  gnome-shell/focal 3.36.1-5ubuntu1 amd64
  gnome-session/focal,focal 3.36.0-2ubuntu1 all

  Oct 22 19:41:09 ourserver kernel: [15260.574496] show_signal_msg: 29 
callbacks suppressed
  Oct 22 19:41:09 ourserver kernel: [15260.574503] gnome-shell[1475]: segfault 
at 11390dbffff8 ip 00007f3fd36f716c sp 00007ffe50e6d788 error 4 in 
libmozjs-68.so.68.6.0[7f3fd3234000+843000]
  Oct 22 19:41:09 ourserver kernel: [15260.574525] Code: 50 10 85 d2 75 d0 0f 
b6 40 14 83 e8 01 3c 01 41 0f 96 c0 44 89 c0 c3 0f 1f 80 00 00 00 00 48 89 f0 
45 31 c0 48 25 00 00 f0 ff <48> 8b 90 f8 ff 0f 00 48 39 17 74 08 44 89 c0 c3 0f 
1f 40 00 48 85
  Oct 22 19:41:09 ourserver kernel: [15260.619146] apport[2636]: segfault at 3 
ip 0000000000000003 sp 00007fffe172cb48 error 14 in python3.8[400000+23000]
  Oct 22 19:41:09 ourserver kernel: [15260.619165] Code: Unable to access 
opcode bytes at RIP 0xffffffffffffffd9.
  Oct 22 19:41:09 ourserver kernel: [15260.619186] Process 2636(apport) has 
RLIMIT_CORE set to 1
  Oct 22 19:41:09 ourserver kernel: [15260.619189] Aborting core
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e761320' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: message repeated 3 times: [ 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e761320' of type 'GCancellable']
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e7d7860' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e80f8e0' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e811b20' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e80e0a0' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x7fd938006460' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e82c1e0' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e7fc320' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x7fd934004a60' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e80ff60' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e8317a0' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e8145e0' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x7fd934005020' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e82c420' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e80fea0' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e7c05e0' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e7dfc20' of type 'GCancellable'
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e761320' of type 'GCancellable'
  Oct 22 19:41:09 ourserver gnome-session[1446]: gnome-session-binary[1446]: 
WARNING: Application 'org.gnome.Shell.desktop' killed by signal 11
  Oct 22 19:41:09 ourserver gnome-session-binary[1446]: WARNING: Application 
'org.gnome.Shell.desktop' killed by signal 11
  Oct 22 19:41:09 ourserver NetworkManager[1049]: 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e761320' of type 'GCancellable'
  Oct 22 19:41:09 ourserver kernel: [15260.661119] general protection fault, 
probably for non-canonical address 0xedededededededed: 0000 [#1] SMP NOPTI
  Oct 22 19:41:09 ourserver kernel: [15260.661131] CPU: 9 PID: 1766 Comm: dconf 
worker Tainted: P           OE     5.11.0-38-generic #42~20.04.1-Ubuntu
  Oct 22 19:41:09 ourserver kernel: [15260.661138] Hardware name: System 
manufacturer System Product Name/PRIME X299-A II, BIOS 1004 03/19/2021
  Oct 22 19:41:09 ourserver kernel: [15260.661141] RIP: 
0010:acct_collect+0x70/0x1e0
  Oct 22 19:41:09 ourserver kernel: [15260.661156] Code: 7d 78 e8 33 8d a9 00 
0f 1f 44 00 00 65 48 8b 04 25 c0 7b 01 00 48 8b 80 68 08 00 00 48 8b 00 48 85 
c0 0f 84 67 01 00 00 31 d2 <48> 03 50 08 48 2b 10 48 8b 40 10 48 85 c0 75 f0 48 
c1 ea 0a 49 89
  Oct 22 19:41:09 ourserver kernel: [15260.661161] RSP: 0018:ffffb32b85a1bd10 
EFLAGS: 00010286
  Oct 22 19:41:09 ourserver kernel: [15260.661168] RAX: edededededededed RBX: 
ffff88c6c2de8900 RCX: ffff88c6d088f700
  Oct 22 19:41:09 ourserver kernel: [15260.661172] RDX: 000000000e664000 RSI: 
0000000000000100 RDI: ffff88c6d088f778
  Oct 22 19:41:09 ourserver kernel: [15260.661176] RBP: ffffb32b85a1bd30 R08: 
00000000000000b9 R09: 0000000000000000
  Oct 22 19:41:09 ourserver kernel: [15260.661179] R10: 0000000000000000 R11: 
0000000000000000 R12: 000000000000000f
  Oct 22 19:41:09 ourserver kernel: [15260.661183] R13: ffff88c6d088f700 R14: 
ffffb32b85a1be70 R15: 0000000000000001
  Oct 22 19:41:09 ourserver kernel: [15260.661187] FS:  00007f2604dc7700(0000) 
GS:ffff88f59fa40000(0000) knlGS:0000000000000000
  Oct 22 19:41:09 ourserver kernel: [15260.661192] CS:  0010 DS: 0000 ES: 0000 
CR0: 0000000080050033
  Oct 22 19:41:09 ourserver kernel: [15260.661196] CR2: 000000c4207c5010 CR3: 
000000014c250005 CR4: 00000000003706e0
  Oct 22 19:41:09 ourserver kernel: [15260.661200] DR0: 0000000000000000 DR1: 
0000000000000000 DR2: 0000000000000000
  Oct 22 19:41:09 ourserver kernel: [15260.661203] DR3: 0000000000000000 DR6: 
00000000fffe0ff0 DR7: 0000000000000400
  Oct 22 19:41:09 ourserver kernel: [15260.661206] Call Trace:
  Oct 22 19:41:09 ourserver kernel: [15260.661212]  do_exit+0x1af/0xaf0
  Oct 22 19:41:09 ourserver kernel: [15260.661223]  ? 
page_add_new_anon_rmap+0x69/0x100
  Oct 22 19:41:09 ourserver kernel: [15260.661235]  do_group_exit+0x43/0xa0
  Oct 22 19:41:09 ourserver kernel: [15260.661242]  get_signal+0x15c/0x850
  Oct 22 19:41:09 ourserver kernel: [15260.661249]  
arch_do_signal_or_restart+0xf0/0x290
  Oct 22 19:41:09 ourserver kernel: [15260.661261]  ? handle_mm_fault+0xd7/0x2b0
  Oct 22 19:41:09 ourserver kernel: [15260.661267]  
exit_to_user_mode_prepare+0x115/0x1a0
  Oct 22 19:41:09 ourserver kernel: [15260.661276]  
syscall_exit_to_user_mode+0x27/0x50
  Oct 22 19:41:09 ourserver kernel: [15260.661287]  do_syscall_64+0x45/0x90
  Oct 22 19:41:09 ourserver kernel: [15260.661293]  
entry_SYSCALL_64_after_hwframe+0x44/0xa9
  Oct 22 19:41:09 ourserver kernel: [15260.661302] RIP: 0033:0x7f26066f0aff
  Oct 22 19:41:09 ourserver kernel: [15260.661308] Code: 54 24 1c 48 89 74 24 
10 48 89 7c 24 08 e8 79 1c f8 ff 8b 54 24 1c 48 8b 74 24 10 41 89 c0 48 8b 7c 
24 08 b8 07 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2b 44 89 c7 89 44 24 08 e8 ad 
1c f8 ff 8b 44
  Oct 22 19:41:09 ourserver kernel: [15260.661313] RSP: 002b:00007f2604dc6d30 
EFLAGS: 00000293 ORIG_RAX: 0000000000000007
  Oct 22 19:41:09 ourserver kernel: [15260.661318] RAX: fffffffffffffdfc RBX: 
00007f26068a80d0 RCX: 00007f26066f0aff
  Oct 22 19:41:09 ourserver kernel: [15260.661322] RDX: 00000000ffffffff RSI: 
0000000000000001 RDI: 000055866839f3a0
  Oct 22 19:41:09 ourserver kernel: [15260.661325] RBP: 000055866839f3a0 R08: 
0000000000000000 R09: 0000000000000001
  Oct 22 19:41:09 ourserver kernel: [15260.661328] R10: 000055866839f528 R11: 
0000000000000293 R12: 0000000000000001
  Oct 22 19:41:09 ourserver kernel: [15260.661331] R13: 00007f2604dc6d74 R14: 
00000000ffffffff R15: 000055866839f4a0
  Oct 22 19:41:09 ourserver kernel: [15260.661337] Modules linked in: 
binfmt_misc nls_iso8859_1 joydev input_leds uas usb_storage hid_generic usbhid 
hid intel_rapl_msr intel_rapl_common nvidia_uvm(POE) nvidia_drm(POE) 
isst_if_common nvidia_modeset(POE) nfit x86_pkg_temp_thermal intel_powerclamp 
coretemp nvidia(POE) snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio 
snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg soundwire_intel 
soundwire_generic_allocation soundwire_cadence snd_hda_codec snd_hda_core 
kvm_intel snd_hwdep soundwire_bus kvm snd_soc_core snd_compress ac97_bus 
snd_pcm_dmaengine crct10dif_pclmul snd_pcm ghash_clmulni_intel aesni_intel 
snd_seq_midi snd_seq_midi_event crypto_simd snd_rawmidi cryptd glue_helper 
snd_seq drm_kms_helper rapl snd_seq_device snd_timer intel_cstate cec eeepc_wmi 
wmi_bmof intel_wmi_thunderbolt rc_core fb_sys_fops syscopyarea snd sysfillrect 
mei_me sysimgblt ioatdma efi_pstore mxm_wmi soundcore mei dca mac_hid acpi_tad 
sch_fq_codel msr parport_pc ppdev drm lp parport ip_tables
  Oct 22 19:41:09 ourserver kernel: [15260.661465]  x_tables autofs4 mfd_aaeon 
asus_wmi sparse_keymap video crc32_pclmul nvme nvme_core intel_lpss_pci 
intel_lpss i2c_i801 e1000e idma64 ahci xhci_pci i2c_smbus virt_dma 
xhci_pci_renesas libahci wmi pinctrl_sunrisepoint
  Oct 22 19:41:09 ourserver kernel: [15260.661505] ---[ end trace 
aeabb7d59b7e7c78 ]---
  Oct 22 19:41:11 ourserver kernel: [15262.665533] RIP: 
0010:acct_collect+0x70/0x1e0
  Oct 22 19:41:11 ourserver kernel: [15262.665541] Code: 7d 78 e8 33 8d a9 00 
0f 1f 44 00 00 65 48 8b 04 25 c0 7b 01 00 48 8b 80 68 08 00 00 48 8b 00 48 85 
c0 0f 84 67 01 00 00 31 d2 <48> 03 50 08 48 2b 10 48 8b 40 10 48 85 c0 75 f0 48 
c1 ea 0a 49 89
  Oct 22 19:41:11 ourserver kernel: [15262.665542] RSP: 0018:ffffb32b85a1bd10 
EFLAGS: 00010286
  Oct 22 19:41:11 ourserver kernel: [15262.665544] RAX: edededededededed RBX: 
ffff88c6c2de8900 RCX: ffff88c6d088f700
  Oct 22 19:41:11 ourserver kernel: [15262.665546] RDX: 000000000e664000 RSI: 
0000000000000100 RDI: ffff88c6d088f778
  Oct 22 19:41:11 ourserver kernel: [15262.665547] RBP: ffffb32b85a1bd30 R08: 
00000000000000b9 R09: 0000000000000000
  Oct 22 19:41:11 ourserver kernel: [15262.665548] R10: 0000000000000000 R11: 
0000000000000000 R12: 000000000000000f
  Oct 22 19:41:11 ourserver kernel: [15262.665549] R13: ffff88c6d088f700 R14: 
ffffb32b85a1be70 R15: 0000000000000001
  Oct 22 19:41:11 ourserver kernel: [15262.665550] FS:  00007f2604dc7700(0000) 
GS:ffff88f59fa40000(0000) knlGS:0000000000000000
  Oct 22 19:41:11 ourserver kernel: [15262.665552] CS:  0010 DS: 0000 ES: 0000 
CR0: 0000000080050033
  Oct 22 19:41:11 ourserver kernel: [15262.665553] CR2: 000000c4207c5010 CR3: 
000000014c250005 CR4: 00000000003706e0
  Oct 22 19:41:11 ourserver kernel: [15262.665554] DR0: 0000000000000000 DR1: 
0000000000000000 DR2: 0000000000000000
  Oct 22 19:41:11 ourserver kernel: [15262.665555] DR3: 0000000000000000 DR6: 
00000000fffe0ff0 DR7: 0000000000000400
  Oct 22 19:41:11 ourserver kernel: [15262.665557] Fixing recursive fault but 
reboot is needed!
  Oct 22 19:41:11 ourserver kernel: [15262.679148] gnome-shell[2640]: segfault 
at 7f8ae3da7a28 ip 00007f89faf43304 sp 00007ffd417f8310 error 6 in 
ld-2.31.so[7f89faf36000+23000]
  Oct 22 19:41:11 ourserver kernel: [15262.679158] Code: 1f 80 00 00 00 00 48 
8b 08 8b 50 08 4c 01 f9 48 83 fa 26 74 0a 48 83 fa 08 0f 85 e5 10 00 00 48 8b 
50 10 48 83 c0 18 4c 01 fa <48> 89 11 48 39 c3 77 d4 4d 8b 93 d0 01 00 00 4d 85 
d2 0f 85 82 fa
  Oct 22 19:41:11 ourserver kernel: [15262.681447] apport[2650]: segfault at 3 
ip 0000000000000003 sp 00007ffffa23a538 error 14 in python3.8[400000+23000]
  Oct 22 19:41:11 ourserver kernel: [15262.681455] Code: Unable to access 
opcode bytes at RIP 0xffffffffffffffd9.
  Oct 22 19:41:11 ourserver kernel: [15262.681463] Process 2650(apport) has 
RLIMIT_CORE set to 1
  Oct 22 19:41:11 ourserver kernel: [15262.681465] Aborting core
  Oct 22 19:41:10 ourserver NetworkManager[1049]: message repeated 14 times: [ 
../../../gobject/gsignal.c:2595: signal 'cancelled' is invalid for instance 
'0x562e9e761320' of type 'GCancellable']
  Oct 22 19:41:11 ourserver gnome-session-binary[1446]: WARNING: Application 
'org.gnome.Shell.desktop' killed by signal 11
  Oct 22 19:41:11 ourserver gnome-session[1446]: gnome-session-binary[1446]: 
WARNING: Application 'org.gnome.Shell.desktop' killed by signal 11
  Oct 22 19:41:11 ourserver gnome-session[1446]: gnome-session-binary[1446]: 
WARNING: App 'org.gnome.Shell.desktop' respawning too quickly
  Oct 22 19:41:11 ourserver gnome-session[1446]: gnome-session-binary[1446]: 
CRITICAL: We failed, but the fail whale is dead. Sorry....
  Oct 22 19:41:11 ourserver gnome-session-binary[1446]: Unrecoverable failure 
in required component org.gnome.Shell.desktop
  Oct 22 19:41:11 ourserver gnome-session-binary[1446]: WARNING: App 
'org.gnome.Shell.desktop' respawning too quickly
  Oct 22 19:41:11 ourserver gnome-session-binary[1446]: CRITICAL: We failed, 
but the fail whale is dead. Sorry....
  Oct 22 19:41:11 ourserver /usr/lib/gdm3/gdm-x-session[1773]: X connection to 
:0 broken (explicit kill or server shutdown).
  Oct 22 19:41:11 ourserver gsd-wacom[1806]: gsd-wacom: Fatal IO error 11 
(Resource temporarily unavailable) on X server :0.
  Oct 22 19:41:11 ourserver gsd-color[1807]: gsd-color: Fatal IO error 11 
(Resource temporarily unavailable) on X server :0.
  Oct 22 19:41:11 ourserver /usr/lib/gdm3/gdm-x-session[1314]: (**) Option "fd" 
"41"
  Oct 22 19:41:11 ourserver kernel: [15262.683987] BUG: Bad page map in process 
pool-gnome-sess  pte:8000000029704025 pmd:1070e0067
  Oct 22 19:41:11 ourserver kernel: [15262.683992] page:000000006f82f6a7 
refcount:0 mapcount:-1 mapping:0000000000000000 index:0x0 pfn:0x29704
  Oct 22 19:41:11 ourserver kernel: [15262.684000] flags: 
0xfffffc0000002(referenced)
  Oct 22 19:41:11 ourserver kernel: [15262.684004] raw: 000fffffc0000002 
ffffe8ffc0a5c108 ffffe8ffc0a5c108 0000000000000000
  Oct 22 19:41:11 ourserver kernel: [15262.684006] raw: 0000000000000000 
0000000000000000 00000000fffffffe 0000000000000000
  Oct 22 19:41:11 ourserver kernel: [15262.684008] page dumped because: bad pte
  Oct 22 19:41:11 ourserver kernel: [15262.684009] addr:00007f46ed00c000 
vm_flags:08000071 anon_vma:0000000000000000 mapping:ffff88c6c65a3598 index:1
  Oct 22 19:41:11 ourserver kernel: [15262.684012] file:libsystemd.so.0.28.0 
fault:ext4_filemap_fault mmap:ext4_file_mmap readpage:ext4_readpage
  Oct 22 19:41:11 ourserver kernel: [15262.684026] CPU: 25 PID: 2641 Comm: 
pool-gnome-sess Tainted: P      D    OE     5.11.0-38-generic #42~20.04.1-Ubuntu
  Oct 22 19:41:11 ourserver kernel: [15262.684031] Hardware name: System 
manufacturer System Product Name/PRIME X299-A II, BIOS 1004 03/19/2021
  Oct 22 19:41:11 ourserver kernel: [15262.684033] Call Trace:
  Oct 22 19:41:11 ourserver kernel: [15262.684039]  dump_stack+0x74/0x92
  Oct 22 19:41:11 ourserver kernel: [15262.684045]  print_bad_pte.cold+0x6a/0xca
  Oct 22 19:41:11 ourserver kernel: [15262.684050]  ? 
__unlock_page_memcg+0x25/0x60
  Oct 22 19:41:11 ourserver kernel: [15262.684054]  ? 
unlock_page_memcg+0x24/0x30
  Oct 22 19:41:11 ourserver kernel: [15262.684056]  
zap_pte_range.isra.0+0x434/0x830
  Oct 22 19:41:11 ourserver kernel: [15262.684063]  unmap_page_range+0x3e4/0x6a0
  Oct 22 19:41:11 ourserver kernel: [15262.684067]  unmap_single_vma+0x7f/0xf0
  Oct 22 19:41:11 ourserver kernel: [15262.684071]  unmap_vmas+0x79/0xf0
  Oct 22 19:41:11 ourserver kernel: [15262.684074]  exit_mmap+0xb4/0x200
  Oct 22 19:41:11 ourserver kernel: [15262.684078]  mmput+0x5d/0x130
  Oct 22 19:41:11 ourserver kernel: [15262.684081]  do_exit+0x332/0xaf0
  Oct 22 19:41:11 ourserver kernel: [15262.684085]  do_group_exit+0x43/0xa0
  Oct 22 19:41:11 ourserver kernel: [15262.684089]  get_signal+0x15c/0x850
  Oct 22 19:41:11 ourserver kernel: [15262.684092]  
arch_do_signal_or_restart+0xf0/0x290
  Oct 22 19:41:11 ourserver kernel: [15262.684101]  ? _copy_from_user+0x3f/0x80
  Oct 22 19:41:11 ourserver kernel: [15262.684107]  
exit_to_user_mode_prepare+0x115/0x1a0
  Oct 22 19:41:11 ourserver kernel: [15262.684111]  
syscall_exit_to_user_mode+0x27/0x50
  Oct 22 19:41:11 ourserver kernel: [15262.684116]  do_syscall_64+0x45/0x90
  Oct 22 19:41:11 ourserver kernel: [15262.684119]  
entry_SYSCALL_64_after_hwframe+0x44/0xa9
  Oct 22 19:41:11 ourserver kernel: [15262.684123] RIP: 0033:0x7f46ecf3489d
  Oct 22 19:41:11 ourserver kernel: [15262.684126] Code: Unable to access 
opcode bytes at RIP 0x7f46ecf34873.
  Oct 22 19:41:11 ourserver kernel: [15262.684127] RSP: 002b:00007f46e95e9ac8 
EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
  Oct 22 19:41:11 ourserver kernel: [15262.684131] RAX: fffffffffffffdfc RBX: 
0000000000000001 RCX: 00007f46ecf3489d
  Oct 22 19:41:11 ourserver kernel: [15262.684133] RDX: 0000000000000001 RSI: 
0000000000000080 RDI: 000055b47f366e90
  Oct 22 19:41:11 ourserver kernel: [15262.684135] RBP: 000055b47f366e88 R08: 
0000000000003b9e R09: 0000000000003b9e
  Oct 22 19:41:11 ourserver kernel: [15262.684137] R10: 00007f46e95e9ae0 R11: 
0000000000000246 R12: 000055b47f366e80
  Oct 22 19:41:11 ourserver kernel: [15262.684139] R13: 0000000000000001 R14: 
000055b47f366e88 R15: 00007f46e95e9c80
  Oct 22 19:41:11 ourserver kernel: [15262.685418] rfkill: input handler enabled
  Oct 22 19:41:11 ourserver kernel: [15262.685754] swap_info_get: Bad swap 
offset entry 3ffffff7fffff
  Oct 22 19:41:11 ourserver kernel: [15262.685758] BUG: Bad page map in process 
ibus-portal  pte:100000000 pmd:107442067
  Oct 22 19:41:11 ourserver kernel: [15262.685760] addr:00007f464ac90000 
vm_flags:08100073 anon_vma:ffff88c6d3ea07e8 mapping:0000000000000000 
index:7f464ac90
  Oct 22 19:41:11 ourserver kernel: [15262.685763] file:(null) fault:0x0 
mmap:0x0 readpage:0x0
  Oct 22 19:41:11 ourserver kernel: [15262.685766] CPU: 14 PID: 1762 Comm: 
ibus-portal Tainted: P    B D    OE     5.11.0-38-generic #42~20.04.1-Ubuntu
  Oct 22 19:41:11 ourserver kernel: [15262.685769] Hardware name: System 
manufacturer System Product Name/PRIME X299-A II, BIOS 1004 03/19/2021
  Oct 22 19:41:11 ourserver kernel: [15262.685770] Call Trace:
  Oct 22 19:41:11 ourserver kernel: [15262.685772]  dump_stack+0x74/0x92
  Oct 22 19:41:11 ourserver kernel: [15262.685778] swap_info_get: Bad swap 
offset entry 3ffffff7fffff
  Oct 22 19:41:11 ourserver kernel: [15262.685779]  print_bad_pte.cold+0x6a/0xca
  Oct 22 19:41:11 ourserver kernel: [15262.685783] BUG: Bad page map in process 
gmain  pte:100000000 pmd:149b35067
  Oct 22 19:41:11 ourserver kernel: [15262.685782]  
zap_pte_range.isra.0+0x59f/0x830
  Oct 22 19:41:11 ourserver kernel: [15262.685786] addr:00007fd50541e000 
vm_flags:08100073 anon_vma:ffff88c6c614e318 mapping:0000000000000000 
index:7fd50541e
  Oct 22 19:41:11 ourserver kernel: [15262.685788]  unmap_page_range+0x3e4/0x6a0
  Oct 22 19:41:11 ourserver kernel: [15262.685789] file:(null) fault:0x0 
mmap:0x0 readpage:0x0
  Oct 22 19:41:11 ourserver /usr/lib/gdm3/gdm-x-session[1314]: (II) event2  - 
Power Button: device removed
  Oct 22 19:41:11 ourserver kernel: [15262.685793]  unmap_single_vma+0x7f/0xf0
  Oct 22 19:41:11 ourserver kernel: [15262.685797]  unmap_vmas+0x79/0xf0
  Oct 22 19:41:11 ourserver kernel: [15262.685800]  exit_mmap+0xb4/0x200
  Oct 22 19:41:11 ourserver kernel: [15262.685803]  mmput+0x5d/0x130
  Oct 22 19:41:11 ourserver kernel: [15262.685805]  do_exit+0x332/0xaf0
  Oct 22 19:41:11 ourserver kernel: [15262.685809]  ? wake_up_state+0x10/0x20
  Oct 22 19:41:11 ourserver kernel: [15262.685814]  ? 
signal_wake_up_state+0x1a/0x30
  Oct 22 19:41:11 ourserver kernel: [15262.685817]  do_group_exit+0x43/0xa0
  Oct 22 19:41:11 ourserver kernel: [15262.685820]  get_signal+0x15c/0x850
  Oct 22 19:41:11 ourserver kernel: [15262.685822]  
arch_do_signal_or_restart+0xf0/0x290
  Oct 22 19:41:11 ourserver kernel: [15262.685827]  ? do_send_sig_info+0x64/0x90
  Oct 22 19:41:11 ourserver kernel: [15262.685831]  
exit_to_user_mode_prepare+0x115/0x1a0
  Oct 22 19:41:11 ourserver kernel: [15262.685834]  
syscall_exit_to_user_mode+0x27/0x50
  Oct 22 19:41:11 ourserver kernel: [15262.685838]  do_syscall_64+0x45/0x90
  Oct 22 19:41:11 ourserver kernel: [15262.685840]  
entry_SYSCALL_64_after_hwframe+0x44/0xa9
  Oct 22 19:41:11 ourserver kernel: [15262.685843] RIP: 0033:0x7f464b56118b
  Oct 22 19:41:11 ourserver kernel: [15262.685845] Code: Unable to access 
opcode bytes at RIP 0x7f464b561161.
  Oct 22 19:41:11 ourserver kernel: [15262.685846] RSP: 002b:00007ffc78dbf130 
EFLAGS: 00000246 ORIG_RAX: 000000000000000e
  Oct 22 19:41:11 ourserver kernel: [15262.685849] RAX: 0000000000000000 RBX: 
0000000000000000 RCX: 00007f464b56118b
  Oct 22 19:41:11 ourserver kernel: [15262.685851] RDX: 0000000000000000 RSI: 
00007ffc78dbf130 RDI: 0000000000000002
  Oct 22 19:41:11 ourserver kernel: [15262.685852] RBP: 0000000000000000 R08: 
0000000000000000 R09: 00007ffc78dbf130
  Oct 22 19:41:11 ourserver kernel: [15262.685853] R10: 0000000000000008 R11: 
0000000000000246 R12: 0000000000000003
  Oct 22 19:41:11 ourserver kernel: [15262.685855] R13: 00007ffc78dbf410 R14: 
00007ffc78dbf390 R15: 000055ca30ebfb50
  Oct 22 19:41:11 ourserver kernel: [15262.685858] CPU: 27 PID: 1850 Comm: 
gmain Tainted: P    B D    OE     5.11.0-38-generic #42~20.04.1-Ubuntu
  Oct 22 19:41:11 ourserver kernel: [15262.685862] Hardware name: System 
manufacturer System Product Name/PRIME X299-A II, BIOS 1004 03/19/2021
  Oct 22 19:41:11 ourserver kernel: [15262.685863] Call Trace:
  Oct 22 19:41:11 ourserver kernel: [15262.685865]  dump_stack+0x74/0x92
  Oct 22 19:41:11 ourserver kernel: [15262.685871]  print_bad_pte.cold+0x6a/0xca
  Oct 22 19:41:11 ourserver kernel: [15262.685875]  
zap_pte_range.isra.0+0x59f/0x830
  Oct 22 19:41:11 ourserver kernel: [15262.685882]  unmap_page_range+0x3e4/0x6a0
  Oct 22 19:41:11 ourserver kernel: [15262.685887]  unmap_single_vma+0x7f/0xf0
  Oct 22 19:41:11 ourserver kernel: [15262.685893]  unmap_vmas+0x79/0xf0
  Oct 22 19:41:11 ourserver kernel: [15262.685897]  exit_mmap+0xb4/0x200
  Oct 22 19:41:11 ourserver kernel: [15262.685902]  mmput+0x5d/0x130
  Oct 22 19:41:11 ourserver kernel: [15262.685905]  do_exit+0x332/0xaf0
  Oct 22 19:41:11 ourserver kernel: [15262.685909]  ? aa_file_perm+0x118/0x480
  Oct 22 19:41:11 ourserver kernel: [15262.685916]  do_group_exit+0x43/0xa0
  Oct 22 19:41:11 ourserver kernel: [15262.685920]  get_signal+0x15c/0x850
  Oct 22 19:41:11 ourserver kernel: [15262.685924]  
arch_do_signal_or_restart+0xf0/0x290
  Oct 22 19:41:11 ourserver kernel: [15262.685930]  ? vfs_read+0x182/0x1b0
  Oct 22 19:41:11 ourserver kernel: [15262.685936]  
exit_to_user_mode_prepare+0x115/0x1a0
  Oct 22 19:41:11 ourserver kernel: [15262.685940]  
syscall_exit_to_user_mode+0x27/0x50
  Oct 22 19:41:11 ourserver kernel: [15262.685946]  do_syscall_64+0x45/0x90
  Oct 22 19:41:11 ourserver kernel: [15262.685949]  
entry_SYSCALL_64_after_hwframe+0x44/0xa9
  Oct 22 19:41:11 ourserver kernel: [15262.685955] RIP: 0033:0x7fd507ad4aff
  Oct 22 19:41:11 ourserver /usr/lib/gdm3/gdm-x-session[1314]: (**) Option "fd" 
"44"
  Oct 22 19:41:11 ourserver kernel: [15262.685958] Code: Unable to access 
opcode bytes at RIP 0x7fd507ad4ad5.
  Oct 22 19:41:11 ourserver kernel: [15262.685960] RSP: 002b:00007fd506532af0 
EFLAGS: 00000293 ORIG_RAX: 0000000000000007
  Oct 22 19:41:11 ourserver kernel: [15262.685964] RAX: fffffffffffffdfc RBX: 
00007fd507d720d0 RCX: 00007fd507ad4aff
  Oct 22 19:41:11 ourserver kernel: [15262.685967] RDX: 00000000ffffffff RSI: 
0000000000000001 RDI: 0000559e827b5a30
  Oct 22 19:41:11 ourserver kernel: [15262.685970] RBP: 0000559e827b5a30 R08: 
0000000000000000 R09: 0000000000000001
  Oct 22 19:41:11 ourserver kernel: [15262.685972] R10: 0000559e82826598 R11: 
0000000000000293 R12: 0000000000000001
  Oct 22 19:41:11 ourserver kernel: [15262.685975] R13: 00007fd506532b34 R14: 
00000000ffffffff R15: 0000559e82826510

  Using gdb on the coredump I see:

  Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
  Core was generated by `gdm-session-worker [pam/gdm-launch-environment]'.
  Program terminated with signal SIGSEGV, Segmentation fault.
  #0  0x00007f9f506256e7 in ?? () from 
/lib/x86_64-linux-gnu/security/pam_systemd.so
  [Current thread is 1 (Thread 0x7f9f513e9040 (LWP 1291))]

  So is this a GDM issue, kernel or something else?

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