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ubuntu 22.04 fail to hibernate with swap partition. systemctl status systemd-hibernate

× systemd-hibernate.service - Hibernate
     Loaded: loaded (/lib/systemd/system/systemd-hibernate.service; static)
     Active: failed (Result: exit-code) since Sat 2023-06-10 15:31:27 EDT; 44min ago
       Docs: man:systemd-hibernate.service(8)
    Process: 5649 ExecStart=/lib/systemd/systemd-sleep hibernate (code=exited, status=1/FAILURE)
   Main PID: 5649 (code=exited, status=1/FAILURE)
        CPU: 4.614s

Jun 10 15:31:21 UX330 systemd[1]: Starting Hibernate...
Jun 10 15:31:21 UX330 systemd-sleep[5649]: Entering sleep state 'hibernate'...
Jun 10 15:31:27 UX330 systemd-sleep[5649]: Failed to put system to sleep. System resumed again: No such device
Jun 10 15:31:27 UX330 systemd-sleep[5766]: /dev/sda:
Jun 10 15:31:27 UX330 systemd-sleep[5766]:  setting Advanced Power Management level to 0xfe (254)
Jun 10 15:31:27 UX330 systemd-sleep[5766]:  APM_level        = 254
Jun 10 15:31:27 UX330 systemd[1]: systemd-hibernate.service: Main process exited, code=exited, status=1/FAILURE
Jun 10 15:31:27 UX330 systemd[1]: systemd-hibernate.service: Failed with result 'exit-code'.
Jun 10 15:31:27 UX330 systemd[1]: Failed to start Hibernate.


sudo lsblk --fs


sda

├─sda1 vfat     FAT32 SYSTEM   218.1M    15% /boot/efi
├─sda2

├─sda3 ntfs           OS

├─sda4 ntfs           RECOVERY

├─sda5 ext4     1.0            123.9G    23% /
└─sda6 swap     1              [SWAP]


$ free -m
               total        used        free      shared  buff/cache   available
Mem:            7834        1654        3888         379        2291        5543
Swap:           8433           0        8433


$ swapon -s
Filename                Type        Size        Used        Priority
/dev/sda6                               partition   8636412     0       -2

/dev/sda is the only SSD in the system in /etc and not sure why hibernate service couldn't find it. /etc/fstab has the correct swap partition UUID.

ying
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