Hello, My name is Alfredo from Spain, I'm a secondary school teacher and I worked with my students with the lego usb tower, I write you in reference to the following commit (2fae9e5a7babada041e2e161699ade2447a01989): patch: 9363741 I have a little problem with the legousbtower module of kernel. I was working with kernel 4.4 and I had no problem with this module, each time that I connected the tower I have the following message in my log: [ 4927.822527] usb 3-1: new low-speed USB device number 2 using xhci_hcd [ 4928.022168] usb 3-1: New USB device found, idVendor=0694, idProduct=0001 [ 4928.022185] usb 3-1: New USB device strings: Mfr=4, Product=26, SerialNumber=0 [ 4928.022188] usb 3-1: Product: LEGO USB Tower [ 4928.022190] usb 3-1: Manufacturer: LEGO Group [ 4929.914818] legousbtower 3-1:1.0: LEGO USB Tower firmware version is 1.0 build 134 [ 4929.915157] legousbtower 3-1:1.0: LEGO USB Tower #-160 now attached to major 180 minor 0 [ 4929.915517] usbcore: registered new interface driver legousbtower And I can use nqc without any problems. Since kernel 4.9 (I've tested it with kernel 4.9 and 4.10), I'm having the same issue. Each time that I connect the legousbtower I have this error: [ 51.036609] usb 1-2: USB disconnect, device number 5 [ 53.025125] usb 1-2: new low-speed USB device number 6 using xhci_hcd [ 53.173087] legousbtower 1-2:1.0: LEGO USB Tower get version control request failed [ 53.173102] legousbtower: probe of 1-2:1.0 failed with error -11 I have tested it in two different distros and in different computers (Lliurex that is based in Ubuntu and Manjaro that is based in Arch). I have also tried to download kernel 4.4 directly to see if it is a problem of the distro, and it works perfectly with the kernel. I have also tried to compile the module from kernel 4.4 in 4.9 but I'm having the same problem, probably at this time I'm groping because this is beyond my knowledge. I have never report a bug to the kernel and I don't really know if it could be a bug, before report it, I would like, if it isn't an inconvenience for you, if it is really a bug related with the last update of the legousbtower module or what it is, because I'm lost. If you need that I do some test I'm available. I know that lego RCX is quite old but I and plenty of my colleagues in Valencia use it and before update the kernel, this issue can be a handicap for them. Thank you for your attention. -- 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
