On Tue, Dec 14, 2010 at 10:48:32AM -0500, Thomas H. George wrote: > On Tue, Dec 14, 2010 at 12:29:34PM +0000, Camaleón wrote: > > On Mon, 13 Dec 2010 17:16:21 -0500, Thomas H. George wrote: > > > > > A Toshiba usb hard drive previously registered with no difficulty on one > > > computer but still registers with no difficulty on a seconcd computer. > > > Both computers are using the Linux 2.6.32-5-amd64 stock kernel but the > > > one with the problem was just updated and the one with no problem was > > > updated last August. > > > > > > By failing to register I mean that when connected I get a continuing > > > series of messages like this: > > > > > > > > > Dec 13 16:54:21 dragon kernel: [ 3212.860525] usb 1-2: new high speed USB > > > device using ehci_hcd and address 44 > > > Dec 13 16:54:21 dragon kernel: [ 3213.008537] hub 1-0:1.0: unable to > > > enumerate USB device on port 2 > > > > (...) > > > > > Has something changed in the kernel? Or perhaps in some other software > > > as in each case the update was a full dist-upgrade? > > > > You mean the USB hard disk is working properly but logs that output or > > you get the errors and the disk is not detected at all? > > The device is detected, that is the led on the device flashes repeatedly > as the system tries to assign a device number and fails. > > > > You can make a quick test: run " dmesg | grep [euo]hci" in both computers > > to > > check what USB module is in charge of the disk. There are some devices that > > play better with old "[uo]hci" stack and have problems when using the new > > one. > > > Very interesting. The older system finds only ehci entries in dmesg. > The newer system finds both ohci and echi entries and, more > importantly, issues a warning that ohci controller is being loaded > before the ehci controller. I don't know how to change this. I checked > /etc/udev but found no rules regarding usb controllers. > > Here is the dmesg output for the newer system: > > > [ 0.778844] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver > [ 0.778899] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver > [ 0.778936] Warning! ehci_hcd should always be loaded before uhci_hcd and > ohci_hcd, not after . . .
Edited /etc/usb_modeswitch.conf to enable mode switching. Now the ehci controller is loaded before the ohci controller. This does not solve the problems. > > > These final entries for the low speed USB device may relate to > Cyberpower ups. The NUT usbd does not always find the Cyperpower driver > on bootup. Left to its own devices it will repeadedly try and fail > again. Issuing the upsdrvctl -D start command two or three times > corrects the situation. I hope correcting the order of loading the usb > controllers will correct all the problems. > > Tom > > > > -- > > To UNSUBSCRIBE, email to [email protected] > > with a subject of "unsubscribe". Trouble? Contact > > [email protected] > > Archive: http://lists.debian.org/[email protected] > > > > > > > -- > To UNSUBSCRIBE, email to [email protected] > with a subject of "unsubscribe". Trouble? Contact [email protected] > Archive: http://lists.debian.org/[email protected] > > -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
