我想从 Linux 访问华为 P9。我知道不久前它确实成功过一次。但现在我很困惑，内核只显示检测到的 CDROM 设备。
[13606.941299] usb 1-3: new high-speed USB device number 15 using xhci_hcd
[13607.091541] usb 1-3: New USB device found, idVendor=12d1, idProduct=107e, bcdDevice= 2.99
[13607.091549] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[13607.091553] usb 1-3: Product: EVA-L09
[13607.091556] usb 1-3: Manufacturer: HUAWEI
[13607.091559] usb 1-3: SerialNumber: MWS0216817007021
[13607.096252] usb-storage 1-3:1.1: USB Mass Storage device detected
[13607.096957] scsi host2: usb-storage 1-3:1.1
[13608.102255] scsi 2:0:0:0: CD-ROM Linux File-CD Gadget 0401 PQ: 0 ANSI: 2
[13608.103724] sr 2:0:0:0: Power-on or device reset occurred
[13608.104291] sr 2:0:0:0: [sr0] scsi-1 drive
[13608.129907] sr 2:0:0:0: Attached scsi CD-ROM sr0
[13608.130219] sr 2:0:0:0: Attached scsi generic sg1 type 5
[13628.342227] ISO 9660 Extensions: Microsoft Joliet Level 1
[13628.350414] ISOFS: changing to secondary root
我可以安装该 CDROM，但上面只有华为 Windows 软件。
我在手机中设置了开发者选项，并尝试了 MTP 和 PTP 设置。华为的 Android 版本是 7.0 本地内核是 5.10