$ sudo apt update
...
All packages are up to date.
$ sudo apt full-upgrade
...
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
$ uname -a
Linux ray-desktop 5.13.0-41-generic #46~20.04.1-Ubuntu SMP Wed Apr 20 13:16:21 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
iPhone-8（15.6.1）的 USB 支架不再显示。
当我将其插入时，iPhone 会发出适当的嗡嗡声，并且在 Ubuntu 系统上显示以下内容：
$ sudo journalctl --follow
Aug 27 18:53:05 ray-desktop kernel: usb 1-1: new high-speed USB device number 10 using xhci_hcd
Aug 27 18:53:05 ray-desktop kernel: usb 1-1: New USB device found, idVendor=05ac, idProduct=12a8, bcdDevice=10.04
Aug 27 18:53:05 ray-desktop kernel: usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Aug 27 18:53:05 ray-desktop kernel: usb 1-1: Product: iPhone
Aug 27 18:53:05 ray-desktop kernel: usb 1-1: Manufacturer: Apple Inc.
Aug 27 18:53:05 ray-desktop kernel: usb 1-1: SerialNumber: ece9a29270f4b897a925bd7c45ef3dde19b22a95
Aug 27 18:53:05 ray-desktop mtp-probe[85766]: checking bus 1, device 10: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1"
Aug 27 18:53:05 ray-desktop mtp-probe[85766]: bus: 1, device: 10 was not an MTP device
Aug 27 18:53:05 ray-desktop mtp-probe[85782]: checking bus 1, device 10: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1"
Aug 27 18:53:05 ray-desktop mtp-probe[85782]: bus: 1, device: 10 was not an MTP device
但是在任何地方都没有明显的安装位置（例如df，mount或FilesGUI）。
几周前一切都运行良好。