When screensaver is on, I often can't wake the system back up again. Screen comes, up, clock shows but frozen and login does nothing.
I have a file `/var/crash/_usr_lib_systemd_systemd.0.crash` from around the incident time, so I guess it's systemd itself that's crashing.
Trying to dig into the crash report, this is how far I get:
```
$ gdb `cat ExecutablePath` CoreDump
GNU gdb (Ubuntu 11.1-0ubuntu2) 11.1
Copyright (C) 2021 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
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Reading symbols from /usr/lib/systemd/systemd...
(No debugging symbols found in /usr/lib/systemd/systemd)
[New LWP 2241488]
[New LWP 1]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/sbin/init recovery dis_ucode_ldr'.
Program terminated with signal SIGABRT, Aborted.
#0 0x00007effcc99175b in kill () at ../sysdeps/unix/syscall-template.S:120
120 ../sysdeps/unix/syscall-template.S: No such file or directory.
[Current thread is 1 (LWP 2241488)]
(gdb) bt
#0 0x00007effcc99175b in kill () at ../sysdeps/unix/syscall-template.S:120
#1 0x0000561ece72cb5c in ?? ()
#2 <signal handler called>
#3 __pthread_kill_implementation (no_tid=0, signo=6, threadid=139637107291648) at pthread_kill.c:44
#4 __pthread_kill_internal (signo=6, threadid=139637107291648) at pthread_kill.c:80
#5 __GI___pthread_kill (threadid=139637107291648, signo=signo@entry=6) at pthread_kill.c:91
#6 0x00007effcc991476 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#7 0x00007effcc9777b7 in __GI_abort () at abort.c:79
#8 0x00007effccced6fe in ?? () from /lib/systemd/libsystemd-shared-248.so
#9 0x0000561ece7758c4 in ?? ()
#10 0x0000561ece77a7aa in ?? ()
#11 0x0000561ece72b8a7 in ?? ()
#12 0x00007effcc978fd0 in __libc_start_call_main (main=main@entry=0x561ece729330, argc=argc@entry=3, argv=argv@entry=0x7ffc9cbad768) at ../sysdeps/nptl/libc_start_call_main.h:58
#13 0x00007effcc97907d in __libc_start_main_impl (main=0x561ece729330, argc=3, argv=0x7ffc9cbad768, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc9cbad758)
at ../csu/libc-start.c:409
#14 0x0000561ece72c6f5 in ?? ()
(gdb)
#0 0x00007effcc99175b in kill () at ../sysdeps/unix/syscall-template.S:120
#1 0x0000561ece72cb5c in ?? ()
#2 <signal handler called>
#3 __pthread_kill_implementation (no_tid=0, signo=6, threadid=139637107291648) at pthread_kill.c:44
#4 __pthread_kill_internal (signo=6, threadid=139637107291648) at pthread_kill.c:80
#5 __GI___pthread_kill (threadid=139637107291648, signo=signo@entry=6) at pthread_kill.c:91
#6 0x00007effcc991476 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#7 0x00007effcc9777b7 in __GI_abort () at abort.c:79
#8 0x00007effccced6fe in ?? () from /lib/systemd/libsystemd-shared-248.so
#9 0x0000561ece7758c4 in ?? ()
#10 0x0000561ece77a7aa in ?? ()
#11 0x0000561ece72b8a7 in ?? ()
#12 0x00007effcc978fd0 in __libc_start_call_main (main=main@entry=0x561ece729330, argc=argc@entry=3, argv=argv@entry=0x7ffc9cbad768) at ../sysdeps/nptl/libc_start_call_main.h:58
#13 0x00007effcc97907d in __libc_start_main_impl (main=0x561ece729330, argc=3, argv=0x7ffc9cbad768, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc9cbad758)
at ../csu/libc-start.c:409
#14 0x0000561ece72c6f5 in ?? ()
quit)
```
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu71
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: GNOME
DistroRelease: Ubuntu 21.10
InstallationDate: Installed on 2016-12-28 (1795 days ago)
InstallationMedia: Ubuntu-GNOME 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160720)
MachineType: System manufacturer System Product Name
NonfreeKernelModules: wl nvidia_modeset nvidia
Package: systemd 248.3-1ubuntu8
PackageArchitecture: amd64
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.13.0-21-generic root=/dev/mapper/ubuntu--gnome--vg-root ro recovery nomodeset dis_ucode_ldr
ProcVersionSignature: Ubuntu 5.13.0-21.21-generic 5.13.18
Tags: impish
Uname: Linux 5.13.0-21-generic x86_64
UpgradeStatus: Upgraded to impish on 2021-11-18 (10 days ago)
UserGroups: adm cdrom dialout dip docker kvm lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 06/15/2021
dmi.bios.release: 5.17
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4002
dmi.board.asset.tag: Default string
dmi.board.name: PRIME X570-P
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4002:bd06/15/2021:br5.17:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEX570-P:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:skuSKU:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
Forgot to go through the checklist ...
$ lsb_release -rd
Description: Ubuntu 21.10
Release: 21.10
$ apt-cache policy systemd
systemd:
Installed: 248.3-1ubuntu8
Candidate: 248.3-1ubuntu8
Version table:
*** 248.3-1ubuntu8 500
500 http://
100 /var/lib/