【 03-06 技术 】

测下这时候otg u盘的读写速度，还是三四十MB每秒吗

昂达平板双系统安卓5.1支不支持充电otg，我不知道
我这单系统的昂达平板，装安卓x86 7.1 lineage os，支持充电otg，Linux 4.8内核

回复 S570582306 :
还真是高速、全速、低速三种模式
充电otg的dmesg输出
android_x86:/ $ su
android_x86:/ # dmesg > /sdcard/d
android_x86:/ # dmesg | grep USB
[ 0.363048] ACPI: Power Resource [USBC] (on)
[ 0.431518] ACPI: bus type USB registered
[ 5.607502] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 5.607976] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 5.608352] uhci_hcd: USB Universal Host Controller Interface driver
[ 5.609103] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 1
[ 5.610885] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 5.611100] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 5.612093] hub 1-0:1.0: USB hub found
[ 6.142539] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 2
[ 6.142868] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003
[ 6.143083] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 6.144075] hub 2-0:1.0: USB hub found
[ 7.374883] usb 1-1: new full-speed USB device number 2 using xhci_hcd
[ 7.486499] usbhid: USB HID core driver
[ 7.640292] usb 1-1: New USB device found, idVendor=1a40, idProduct=0101
[ 7.640296] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[ 7.640299] usb 1-1: Product: USB 2.0 Hub [Safe]
[ 7.654155] hub 1-1:1.0: USB hub found
[ 8.075092] usb 1-1.1: new low-speed USB device number 3 using xhci_hcd
[ 8.199376] usb 1-1.1: New USB device found, idVendor=1a2c, idProduct=0c21
[ 8.223294] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 8.246978] usb 1-1.1: Product: USB Keyboard
[ 8.258868] usb 1-1.1: Manufacturer: USB
[ 8.269889] input: USB USB Keyboard as /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1.1/1-1.1:1.0/0003:1A2C:0C21.0001/input/input0
[ 8.329843] hid-generic 0003:1A2C:0C21.0001: input,hidraw0: USB HID v1.10 Keyboard [USB USB Keyboard] on usb-0000:00:14.0-1.1/input0
[ 8.352196] input: USB USB Keyboard as /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1.1/1-1.1:1.1/0003:1A2C:0C21.0002/input/input1
[ 8.417217] hid-generic 0003:1A2C:0C21.0002: input,hidraw1: USB HID v1.10 Mouse [USB USB Keyboard] on usb-0000:00:14.0-1.1/input1
[ 8.501096] usb 1-1.2: new full-speed USB device number 4 using xhci_hcd
[ 8.677592] usb 1-1.2: New USB device found, idVendor=174c, idProduct=55aa
[ 8.690613] usb 1-1.2: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 8.724684] usb-storage 1-1.2:1.0: USB Mass Storage device detected
[ 8.929042] usb 1-1.3: new full-speed USB device number 5 using xhci_hcd
[ 9.048406] usb 1-1.3: New USB device found, idVendor=05e3, idProduct=0610
[ 9.132336] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 9.140715] usb 1-1.3: Product: USB2.0 Hub
[ 9.223341] hub 1-1.3:1.0: USB hub found
[ 9.615072] usb 1-1.3.1: new full-speed USB device number 6 using xhci_hcd
[ 9.701447] usb 1-1.3.1: New USB device found, idVendor=0b95, idProduct=1790
[ 9.701460] usb 1-1.3.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 11.642434] ax88179_178a 1-1.3.1:1.0 eth0: register 'ax88179_178a' at usb-0000:00:14.0-1.3.1, ASIX AX88179 USB 3.0 Gigabit Ethernet, 00:0e:c6:c3:60:ac
[ 46.075086] usb 1-1.1: usbfs: USBDEVFS_CONTROL failed cmd UsbService host rqt 128 rq 6 len 254 ret -75
android_x86:/ #
这是单独otg hub的dmesg
[ 451.717137] usb 1-1: USB disconnect, device number 8
[ 451.717163] usb 1-1.3: USB disconnect, device number 9
[ 451.717182] usb 1-1.3.1: USB disconnect, device number 10
[ 451.717595] ax88179_178a 1-1.3.1:1.0 eth0: unregister 'ax88179_178a' usb-0000:00:14.0-1.3.1, ASIX AX88179 USB 3.0 Gigabit Ethernet
[ 454.410284] usb 1-1: new high-speed USB device number 12 using xhci_hcd
[ 454.578593] usb 1-1: New USB device found, idVendor=1a40, idProduct=0101
[ 454.578619] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[ 454.578637] usb 1-1: Product: USB 2.0 Hub
[ 454.866200] usb 1-1.3: new high-speed USB device number 13 using xhci_hcd
[ 454.956742] usb 1-1.3: New USB device found, idVendor=05e3, idProduct=0610
[ 454.956771] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 454.956789] usb 1-1.3: Product: USB2.0 Hub
[ 454.956804] usb 1-1.3: Manufacturer: GenesysLogic
[ 455.231300] usb 1-1.3.1: new high-speed USB device number 14 using xhci_hcd
[ 455.315011] usb 1-1.3.1: New USB device found, idVendor=0b95, idProduct=1790
[ 455.315082] usb 1-1.3.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 455.315102] usb 1-1.3.1: Product: AX88179
[ 455.315118] usb 1-1.3.1: Manufacturer: ASIX Elec. Corp.
[ 455.315133] usb 1-1.3.1: SerialNumber: 000000000000@3
[ 455.648314] ax88179_178a 1-1.3.1:1.0 eth0: register 'ax88179_178a' at usb-0000:00:14.0-1.3.1, ASIX AX88179 USB 3.0 Gigabit Ethernet, 00:0e:c6:c3:60:ac
android_x86:/ #

充着电写入还是37M/S不到40

楼主v80可不可以实现

～～～～～

请问你看主板哪个位置，机子我打开了，里面很多地方都贴有黑色胶带

这个怎么不出教程尼