On Sat, 18 Nov 2006, [EMAIL PROTECTED] wrote: > i have a pendrive the work correctly when plugged directly in a port on > the pc but dont start at all when i connect it in the hub of my usb > keyboard (apple white kb). I have Ubuntu 6.10 (kernel 2.6.17). > > Here my dmesg when connected to hub: > [ 7543.837101] usb 1-8.2: new full speed USB device using ohci_hcd and > address 7 > [ 7543.893559] usb 1-8.2: can't connect bus-powered hub to this port > > directly on the pc: > [ 7567.507099] usb 2-10: new high speed USB device using ehci_hcd and address > 6 > [ 7567.579895] usb 2-10: configuration #1 chosen from 1 choice > [ 7567.579995] hub 2-10:1.0: USB hub found > [ 7567.580100] hub 2-10:1.0: 1 port detected > [ 7567.730993] usb 2-10.1: new high speed USB device using ehci_hcd and > address 7 > [ 7567.783873] usb 2-10.1: configuration #1 chosen from 1 choice > [ 7567.857458] usbcore: registered new driver libusual > [ 7567.891448] Initializing USB Mass Storage driver... > [ 7567.891498] scsi4 : SCSI emulation for USB Mass Storage devices > [ 7567.891538] usb-storage: device found at 7 > [ 7567.891540] usb-storage: waiting for device to settle before scanning > [ 7567.891547] usbcore: registered new driver usb-storage > [ 7567.891550] USB Mass Storage support registered. > > Ps: on xp work perfectly when connected to kb, so its not an HW problem
On the contrary -- it _is_ a hardware problem. Your pendrive contains an embedded hub (see the third line of your "directly on the pc" log). Both it and the hub in your keyboard get their power from the USB bus. But according to the USB specification, it is illegal to plug one bus-powered hub into another (see the error message in your first log). If you can plug the pendrive into some external power source, that would solve the problem. Likewise, if you used a powered hub instead of the one in your keyboard, that would also solve the problem. Alan Stern ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
