If you really want a solution, eliminating several of those possibilities is a good first step. Of course, the kernel assumes that the serial-USB adapter is working properly.ġ) The kernel and adapter are working properly and the MTP device is not known to the kernel.Ģ) The kernel and adapter are working properly and the device is not really an MTP-compatible device. And about the possibility of it being a fake, I have two of different brands.Īre you asking "Why, after the first failure, does it continue to fail?"įrom the log you showed, the kernel's perspective is that it does not recognize the MTP device. So what is it that keeps it from working again after a 1st failure. Kernel: pl2303: Prolific PL2303 USB to serial adaptor driver Kernel: usbcore: registered new interface driver pl2303 Kernel: usb 5-3: pl2303 converter now attached to ttyUSB0 Kernel: USB Serial support registered for pl2303
Kernel: usbserial: USB Serial Driver core Kernel: usbcore: registered new interface driver usbserial_generic Kernel: USB Serial support registered for generic Kernel: usbcore: registered new interface driver usbserial
Mtp-probe: bus: 5, device: 2 was not an MTP device Kernel: usb 5-3: new full-speed USB device number 2 using ohci_hcd I don't want to reboot !Īfter a reboot the USB/serial adapter registers itself as /dev/ttyUSB0 and works again. I've also tried "sudo service uvdev restart" to no avail. The devices are a Trendnet TU-S9 and a Unitek but they both show up identical. Ls: cannot access /lib/udev/mtp-probe: No such file or directoryīus 006 Device 005: ID 067b:2303 Prolific Technology, Inc. Ls: cannot access /dev/ttyUSB*: No such file or directory Kernel: usb 6-1: usbfs: process 4191 (EMT-2) did not claim interface 0 before use Kernel: pl2303 6-1:1.0: device disconnected Kernel: pl2303 ttyUSB0: pl2303 converter now disconnected from ttyUSB0 Kernel: usb 6-1: pl2303 converter now attached to ttyUSB0 Kernel: usb 6-1: new full-speed USB device number 5 using ohci_hcd I always get this error when I replug the device(s): I have two different USB to serial converters that normally work, but sometimes they simply stop working and nothing short of a reboot will make them work again.
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