On Sun, 22 Sep 2013, folkert wrote: > Hi, > > Cleware GMBH is a German company producing all kinds of USB devices. > Switches, lights, sensors, etc. > As a hobbyist, I do the Linux support for them (I wrote a userspace > program to control their devices). > Now a new range of products are to be released with new firmware. I > think I'm seeing problems with them and I would like to discuss them > here before bothering Cleware. > When the device is plugged in, I can access it, somewhat. Why somewhat? > Because it looks as if it is "thrown out" and reconnected each 6-7 > seconds: > > [715607.610601] usb 3-3: USB disconnect, device number 93 > [715607.976312] usb 3-3: new low-speed USB device number 94 using xhci_hcd > [715607.997641] usb 3-3: New USB device found, idVendor=0d50, idProduct=0010 > [715607.997644] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > [715607.997645] usb 3-3: Product: USB-Temp > [715607.997647] usb 3-3: Manufacturer: Cleware GmbH > [715607.997648] usb 3-3: SerialNumber: 63813 > [715607.997807] usb 3-3: ep 0x81 - rounding interval to 64 microframes, ep desc says 80 microframes > [715607.997810] usb 3-3: ep 0x2 - rounding interval to 64 microframes, ep desc says 80 microframes > [715608.000742] hid-generic 0003:0D50:0010.0934: hiddev0,hidraw1: USB HID v1.11 Device [Cleware GmbH USB-Temp] on usb-0000:00:14.0-3/input0 > [715614.701038] usb 3-3: USB disconnect, device number 94 > [715615.070236] usb 3-3: new low-speed USB device number 95 using xhci_hcd Does the device behave the same way if you plug it into a USB-2 port instead of a USB-3 port? > My question now is: is this a Linux kernel problem? Or a problem with > the firmware of these devices? If it is the latter case, please (please) > tell me (if possible) what it is doing wrong. There's no way to tell for certain from just the kernel log. However, if the device behaves differently when plugged into a USB-2 port then most likely the problem isn't in the device. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
