Bug 1858219

That is strange. If there's no swap, the error message is "Not enough swap space for hibernation".
Can you please install systemd-tests and execute:
sudo /usr/lib/systemd/tests/test-sleep

Yes,but there is swap on this system.
[lnie@localhost ~]$ swapon
NAME      TYPE      SIZE USED PRIO
/dev/dm-1 partition 7.5G   0B   -2

[lnie@localhost ~]$ sudo /usr/lib/systemd/tests/test-sleep
/* test_parse_sleep_config */
  allow_suspend: 1
  allow_hibernate: 1
  allow_s2h: 1
  allow_hybrid_sleep: 1
  suspend modes:
         states: mem, standby, freeze
  hibernate modes: platform, shutdown
           states: disk
  hybrid modes: suspend, platform, shutdown
        states: disk
/* test_sleep */
/= configuration =/
Standby configured: no
Suspend configured: yes
Hibernate configured: no
Hibernate+Suspend (Hybrid-Sleep) configured: no
Hibernate+Reboot configured: no
Hibernate+Platform configured: no
Hibernate+Shutdown configured: no
Freeze configured: yes
/= running system =/
Suspend configured and possible: yes
Hibernation configured and possible: no
Hybrid-sleep configured and possible: no
Unable to hibernate system.
Suspend-then-Hibernate configured and possible: no
/* test_fiemap */
extent map information for /usr/lib/systemd/tests/test-sleep:
     start: 0
     length: 20408
     flags: 1
     number of mapped extents: 1
     extent count: 1
     first extent location: 2719360

'cat /proc/cmdline' and 'systemd-analyze cat-config systemd/sleep.conf' please.

[lnie@localhost ~]$ cat /proc/cmdline
BOOT_IMAGE=(hd0,gpt4)/vmlinuz-5.8.0-0.rc4.1.fc33.x86_64 root=/dev/mapper/fedora_localhost--live-root ro resume=/dev/mapper/fedora_localhost--live-swap rd.lvm.lv=fedora_localhost-live/root rd.lvm.lv=fedora_localhost-live/swap rhgb quiet
[lnie@localhost ~]$ systemd-analyze cat-config systemd/sleep.conf
# /etc/systemd/sleep.conf
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.
#
# Entries in this file show the compile time defaults.
# You can change settings by editing this file.
# Defaults can be restored by simply deleting this file.
#
# See systemd-sleep.conf(5) for details

[Sleep]
#AllowSuspend=yes
#AllowHibernation=yes
#AllowSuspendThenHibernate=yes
#AllowHybridSleep=yes
#SuspendMode=
#SuspendState=mem standby freeze
#HibernateMode=platform shutdown
#HibernateState=disk
#HybridSleepMode=suspend platform shutdown
#HybridSleepState=disk
#HibernateDelaySec=180min

An incorrect errno was passed in the code. This might be fixed by https://github.com/systemd/systemd/commit/6f9120ad61.

Oh, this is rawhide, not F32. So that's patch is already applies.

Could you please run 'sudo strace -s200 /usr/lib/systemd/tests/test-sleep' and attach here?

Created attachment 1702499 [details]
output of " sudo strace -s200 /usr/lib/systemd/tests/test-sleep"

Thanks.

access("/sys/power/state", W_OK)        = 0
openat(AT_FDCWD, "/sys/power/state", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0
read(3, "freeze mem\n", 4096)           = 11

So hibernation is disabled at the kernel level. Do you have Secure Boot enabled?
(E.g. what does 'bootctl' say?)

Np.I haven't set anything,just do a default installation,and I don't know why secure boot is enabled.

[lnie@localhost ~]$ sudo bootctl
[sudo] password for lnie: 
systemd-boot not installed in ESP.
System:
     Firmware: n/a (n/a)
  Secure Boot: enabled
   Setup Mode: user
 Boot into FW: supported

Current Boot Loader:
      Product: n/a
     Features: ✗ Boot counting
               ✗ Menu timeout control
               ✗ One-shot menu timeout control
               ✗ Default entry control
               ✗ One-shot entry control
               ✗ Support for XBOOTLDR partition
               ✗ Support for passing random seed to OS
               ✗ Boot loader sets ESP partition information
          ESP: n/a
         File: └─n/a

Random Seed:
 Passed to OS: no
 System Token: not set
       Exists: no

Available Boot Loaders on ESP:
          ESP: /boot/efi (/dev/disk/by-partuuid/41a53e43-4afc-4f85-b8d9-7c9407781a73)
         File: └─/EFI/BOOT/bootx64.efi
         File: └─/EFI/BOOT/BOOTIA32.EFI

Boot Loaders Listed in EFI Variables:
        Title: Fedora
           ID: 0x0001
       Status: active, boot-order
    Partition: /dev/disk/by-partuuid/41a53e43-4afc-4f85-b8d9-7c9407781a73
         File: └─/EFI/fedora/shimx64.efi

        Title: Windows Boot Manager
           ID: 0x0000
       Status: active, boot-order
    Partition: /dev/disk/by-partuuid/41a53e43-4afc-4f85-b8d9-7c9407781a73
         File: └─/EFI/Microsoft/Boot/bootmgfw.efi

Boot Loader Entries:
        $BOOT: /boot/efi (/dev/disk/by-partuuid/41a53e43-4afc-4f85-b8d9-7c9407781a73)

0 entries, no entry could be determined as default.

I queued up a patch locally to make the logs more verbose in this case. But there
isn't anything to fix here really. The kernel does not allow hibernation when
secure boot is enabled. For the foreseeable future, users need to either disable
secure boot or live without hibernation.