Looks like it's the network waking the machine up, so try disabling any wake-on-network-activity option(s) in your BIOS.
rugs. 17 11:48:13 joao-X541NC systemd[1]: Finished Suspend. rugs. 17 11:48:13 joao-X541NC systemd[1]: Stopped target Sleep. rugs. 17 11:48:13 joao-X541NC systemd[1]: Reached target Suspend. rugs. 17 11:48:13 joao-X541NC systemd[1]: Stopped target Suspend. rugs. 17 11:48:13 joao-X541NC systemd-logind[966]: Operation 'sleep' finished. rugs. 17 11:48:13 joao-X541NC NetworkManager[937]: <info> [1631868493.2691] manager: sleep: wake requested (sleeping: yes enabled: yes) rugs. 17 11:48:13 joao-X541NC NetworkManager[937]: <info> [1631868493.2693] device (enp1s0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'managed') rugs. 17 11:48:13 joao-X541NC kernel: RTL8208 Fast Ethernet r8169-100:00: attached PHY driver (mii_bus:phy_addr=r8169-100:00, irq=POLL) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1943469 Title: [Asus X541NC] wakes up from sleep mode after 1 second To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.11/+bug/1943469/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
