So, I have hibernated system manually and started again. This is the log for it: 16.06.24 21:36 systemd-logind The system will hibernate now! 16.06.24 21:36 systemd Starting System Hibernate... 16.06.24 21:36 systemd-sleep INFO: running /usr/lib/systemd/system-sleep/grub2.sleep for hibernate 16.06.24 21:36 systemd-sleep Entering sleep state 'hibernate'... 16.06.24 21:36 kernel PM: hibernation: hibernation entry 16.06.24 21:58 kernel PM: hibernation: Marking nosave pages: [mem 0x00000000-0x00000fff] 16.06.24 21:58 kernel PM: hibernation: Marking nosave pages: [mem 0x00058000-0x00058fff] 16.06.24 21:58 kernel PM: hibernation: Marking nosave pages: [mem 0x0009e000-0x000fffff] 16.06.24 21:58 kernel PM: hibernation: Marking nosave pages: [mem 0x6d7fd000-0x6d7fdfff] 16.06.24 21:58 kernel PM: hibernation: Marking nosave pages: [mem 0x6d80a000-0x6d80bfff] 16.06.24 21:58 kernel PM: hibernation: Marking nosave pages: [mem 0x6d81b000-0x6d81bfff] 16.06.24 21:58 kernel PM: hibernation: Marking nosave pages: [mem 0x70b71000-0x70b72fff] 16.06.24 21:58 kernel PM: hibernation: Marking nosave pages: [mem 0x7bd97000-0x7be78fff] 16.06.24 21:58 kernel PM: hibernation: Marking nosave pages: [mem 0x7d9c3000-0x7d9c3fff] 16.06.24 21:58 kernel PM: hibernation: Marking nosave pages: [mem 0x7eaa8000-0x7fffdfff] 16.06.24 21:58 kernel PM: hibernation: Marking nosave pages: [mem 0x7ffff000-0xffffffff] 16.06.24 21:58 kernel PM: hibernation: Basic memory bitmaps created 16.06.24 21:58 kernel PM: hibernation: Preallocating image memory 16.06.24 21:58 kernel PM: hibernation: Allocated 892640 pages for snapshot 16.06.24 21:58 kernel PM: hibernation: Allocated 3570560 kbytes in 2.94 seconds (1214.47 MB/s) 16.06.24 21:58 kernel PM: hibernation: PM: secret key is invalid 16.06.24 21:58 kernel PM: hibernation: Creating image: 16.06.24 21:58 kernel PM: hibernation: Need to copy 882950 pages 16.06.24 21:58 kernel PM: hibernation: Normal pages needed: 882950 + 1024, available pages: 2208611 16.06.24 21:58 kernel PM: hibernation: PM: Trampoline freed 16.06.24 21:58 kernel PM: hibernation: Basic memory bitmaps freed 16.06.24 21:58 kernel PM: hibernation: hibernation exit 16.06.24 21:59 systemd-sleep INFO: running /usr/lib/systemd/system-sleep/grub2.sleep for hibernate 16.06.24 21:59 systemd systemd-hibernate.service: Deactivated successfully. 16.06.24 21:59 systemd Finished System Hibernate. 16.06.24 21:59 systemd systemd-hibernate.service: Consumed 3.879s CPU time. 16.06.24 21:59 systemd Reached target System Hibernation. 16.06.24 21:59 systemd Stopped target System Hibernation. No log when automatically sleep and hibernate due to crash possible.