Hello again, I believe I have cause to bring this thread back to life. On Sun, Aug 6, 2017 at 11:50 AM, <tu...@posteo.de> wrote: > When I plug in such a little board into my PC, demesg > reports: > [ 1429.834140] usb 7-4: new low-speed USB device number 15 using ohci-pci > [ 1429.965142] usb 7-4: device descriptor read/64, error -62 > [ 1430.203151] usb 7-4: device descriptor read/64, error -62 > [ 1430.438161] usb 7-4: new low-speed USB device number 16 using ohci-pci > [ 1430.569151] usb 7-4: device descriptor read/64, error -62 > [ 1430.803174] usb 7-4: device descriptor read/64, error -62 > [ 1431.038184] usb 7-4: new low-speed USB device number 17 using ohci-pci > [ 1431.456157] usb 7-4: device not accepting address 17, error -62 > [ 1431.582204] usb 7-4: new low-speed USB device number 18 using ohci-pci > [ 1432.000209] usb 7-4: device not accepting address 18, error -62 > [ 1432.000244] usb usb7-port4: unable to enumerate USB device >
This is with a NUCLEO-L432KC, an STM32 development board: [1817074.986238] usb usb3-port14: unable to enumerate USB device [1817075.429167] usb 3-14: new low-speed USB device number 50 using xhci_hcd [1817075.586133] usb 3-14: device descriptor read/64, error -71 [1817075.847136] usb 3-14: device descriptor read/64, error -71 [1817076.110100] usb 3-14: new low-speed USB device number 51 using xhci_hcd [1817076.267102] usb 3-14: device descriptor read/64, error -71 [1817076.527036] usb 3-14: device descriptor read/64, error -71 [1817076.790003] usb 3-14: new low-speed USB device number 52 using xhci_hcd [1817076.790470] usb 3-14: Device not responding to setup address. [1817076.994569] usb 3-14: Device not responding to setup address. [1817077.201986] usb 3-14: device not accepting address 52, error -71 [1817077.357969] usb 3-14: new low-speed USB device number 53 using xhci_hcd [1817077.358525] usb 3-14: Device not responding to setup address. [1817077.562503] usb 3-14: Device not responding to setup address. [1817077.769930] usb 3-14: device not accepting address 53, error -71 [1817077.769959] usb usb3-port14: unable to enumerate USB device [1817080.134131] usb 3-5: USB disconnect, device number 29 Admittedly, I cut apart a USB cable and am using socketed pin headers to attach it to the development board (I'd like to keep it looking nice). However, this same board properly identifies as a USB CDC device to Windows. There may be an issue with the kernel driver, Meino. I'm going to see how I should follow up on this. Can you test your ATtiny85 with Windows? R0b0t1.
