lwk@qwfys:~$ fwupdmgr get-devices
XPS 15 9560
│
├─System Firmware:
│ Device ID: a45df35ac0e948ee180fe216a5f703f32dda163f
│ Summary: UEFI ESRT device
│ Current version: 1.23.1
│ Minimum Version: 1.23.1
│ Vendor: Dell (DMI:Dell Inc.)
│ Update State: Success
│ Update Error: Cannot install update when not on AC power
│ GUIDs: 34578c72-11dc-4378-bc7f-b643866f598c
│ 230c8b18-8d9b-53ec-838b-6cfc0383493a
│ 18a8f546-f58a-556b-ae29-00fc15163b7d
│ Device Flags: ? Internal device
│ ? System requires external power source
│ ? Supported on remote server
│ ? Needs a reboot after installation
│ ? Device is usable for the duration of the update
│ ? Updatable
│
└─THNSN5512GPUK NVMe TOSHIBA 512GB:Device ID: 3743975ad7f64f8d6575a9ae49fb3a8856fe186fSummary: NVM Express solid state driveCurrent version: 5KDA4103Vendor: Toshiba Corporation (NVME:0x1179)Update Error: Cannot install update when not on AC powerGUIDs: a1aa7718-9375-5e24-9b93-5426989c82a0f68c10f1-7ffe-5d9d-aab4-9ffb60dae498bfe8d16e-b612-5f26-9526-0123dd679e7da7e9412b-a3cf-5819-9029-105efad314f1b03f4f21-f1c3-5b21-bb57-c5096120e7daDevice Flags: ? Internal device? System requires external power source? Needs a reboot after installation? Device is usable for the duration of the update? Updatablelwk@qwfys:~$
出现这个问题的原因主要是由于电脑电源线没有插上。插上电源线以后，再次查看，就会发现已经正常了。
lwk@qwfys:~$ fwupdmgr get-devices
XPS 15 9560
│
├─System Firmware:
│ Device ID: a45df35ac0e948ee180fe216a5f703f32dda163f
│ Summary: UEFI ESRT device
│ Current version: 1.23.1
│ Minimum Version: 1.23.1
│ Vendor: Dell (DMI:Dell Inc.)
│ Update State: Success
│ GUIDs: 34578c72-11dc-4378-bc7f-b643866f598c
│ 230c8b18-8d9b-53ec-838b-6cfc0383493a
│ 18a8f546-f58a-556b-ae29-00fc15163b7d
│ Device Flags: ? Internal device
│ ? Updatable
│ ? System requires external power source
│ ? Supported on remote server
│ ? Needs a reboot after installation
│ ? Device is usable for the duration of the update
│
└─THNSN5512GPUK NVMe TOSHIBA 512GB:Device ID: 3743975ad7f64f8d6575a9ae49fb3a8856fe186fSummary: NVM Express solid state driveCurrent version: 5KDA4103Vendor: Toshiba Corporation (NVME:0x1179)GUIDs: a1aa7718-9375-5e24-9b93-5426989c82a0f68c10f1-7ffe-5d9d-aab4-9ffb60dae498bfe8d16e-b612-5f26-9526-0123dd679e7da7e9412b-a3cf-5819-9029-105efad314f1b03f4f21-f1c3-5b21-bb57-c5096120e7daDevice Flags: ? Internal device? Updatable? System requires external power source? Needs a reboot after installation? Device is usable for the duration of the updatelwk@qwfys:~$