On Fri, Dec 17, 2010 at 09:09:55PM +0000, Camaleón wrote: > On Fri, 17 Dec 2010 15:07:53 -0500, Thomas H. George wrote: > > > On Fri, Dec 17, 2010 at 08:24:01AM +0000, Camaleón wrote: > > >> Even if you boot up with just the USB hard disk attached? :-? > >> > > Found that if I power down the computer - not just reboot - and connect > > the USB drive its drive light begins to flash immediately. Then when > > the computer is powered up as bios is loaded the drive is recognized at > > the bnttom of the list of hard drives available for the boot sequence > > and its drive light comes on steadily. The boot sequence continues > > normally and when complete the USB drive can be mounted but only by > > root! > > > > This does not solve the hot plug problem! > > Nope, not at all :-( > > > The moment the USB drive is unmounted it returns to the previous state - > > flashing steadily while the "unable to enumerate USB device on port 2" > > message scrolls by. > > > > I regularly connect my Sansa MP3/MP4 player to this same usb port and > > mount it as user tom. Again there is a message "unable to enumerate USB > > device on port 2" but there is no problem in continuing. Here is the > > tail of dmesg: > > (...) > > Okay, it seems to be working fine. Is your USB hard disk being powered > externally or it uses the USB's own voltage? > > >> > Tried rmmod ehci_hcd which removed the module. This did not help, > >> > same result as above. > >> > >> "Same" message cannot be ;-) > >> > >> If the high speed USB module was removed, "ehci_hdc" should not be > >> present in your "dmesg" log when plugging the drive (resend the log > >> again, once you unload "ehci_hcd" module). > > > > You are correct. After rmmod ehci_hcd the tail of dmesg is > > > > [ 1441.408024] hub 2-0:1.0: unable to enumerate USB device on port 2 [ > > 1441.816519] hub 2-0:1.0: unable to enumerate USB device on port 2 [ > > 1442.240023] hub 2-0:1.0: unable to enumerate USB device on port 2 [ > > 1442.824520] usb 2-2: new full speed USB device using ohci_hcd and > > address 41 [ 1442.888534] hub 2-0:1.0: unable to enumerate USB device on > > port 2 [ 1443.136518] hub 2-0:1.0: unable to enumerate USB device on > > port 2 [ 1443.544520] hub 2-0:1.0: unable to enumerate USB device on > > port 2 [ 1443.960519] hub 2-0:1.0: unable to enumerate USB device on > > port 2 [ 1444.384020] hub 2-0:1.0: unable to enumerate USB device on > > port 2 [ 1444.792017] hub 2-0:1.0: unable to enumerate USB device on > > port 2 > >> > > Note these messages would scroll by rapidly as addresses 5 through 127 > > would be tried repeatedly > > There is still one more thing I would try: completely unload and reload > all of the USB modules (modprobe -r ehci_hdc; modprobe -r ohci_hdc; > modprobe ehci_hdc; modprobe ohci_hdc) and then, switch on your USB drive. > If none of the above helps, I would fill a bug. > None of this helped, I'll try to file a bug.
Tom > > > -- > To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org > Archive: http://lists.debian.org/pan.2010.12.17.21.09...@gmail.com > > -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20101218184741.ga10...@tomgeorge.info
