Alan Stern wrote: > > On Thu, 6 Jul 2006, Foli Ayivoh wrote: > > > Hi Alan, > > > > I could not find "boot device" related stuff in the thread!? > > What? You mentioned it in the very first email message of this thread. > In http://marc.theaimsgroup.com/?l=linux-kernel&m=115143262828836&w=2 > you wrote: > > Two issues on USB: > > First: > USB-HDD boot device hangs > > That's where "boot device" related stuff first appeared in this thread. That's true! But I meant this thread: http://marc.theaimsgroup.com/?l=linux-usb-devel&m=114929015907507&w=2 that you refer to in your e-mail. (e-mail attached) Sorry for the confusion! > > > Could the value of "Interface Descriptor: bInterfaceSubClass" > > or "Interface Descriptor: bInterfaceProtocol" that might differes > > between _boot_device_ and _not_boot_device_ > > No. That refers to something entirely different. > > > This is from my keyboard: > > Interface Descriptor: > > bLength 9 > > bDescriptorType 4 > > bInterfaceNumber 0 > > bAlternateSetting 0 > > bNumEndpoints 1 > > bInterfaceClass 3 Human Interface Devices > > bInterfaceSubClass 1 Boot Interface Subclass > > bInterfaceProtocol 2 Mouse > > iInterface 0 > > The "Boot Interface Subclass" means that the BIOS will be able to use the > keyboard at boot time, even before you have loaded an operating system. > > > Oh, just forget what I ask right now :-( I just get a hang on the > > usb-storage-device _not_ connected as boot-device > > > > > > btw. what is -104 > > cce35c60 3670790155 C Bi:006:06 -104 0 > > -104 means that the request was cancelled by the computer. Probably > because the device took too long to respond. > > Alan Stern >
On Wed, 5 Jul 2006, Foli Ayivoh wrote:
> Alan Stern wrote: > > > > The dump shows that the drive just stopped responding at one spot and then > > was reset. Sometimes devices do that; nobody seems to know why. > > > > The real test is to use CONFIG_USB_STORAGE_DEBUG when you boot off the USB > > device. > > > > Alan Stern > > > Hi Alan, > > here are the requested dumps of dmesg and usbmon: > usb-storage-dmesg > usb-storage-usbmon It's quite possible that you're suffering from the same problem as Vivek Dharmadhikari in this thread: http://marc.theaimsgroup.com/?l=linux-usb-devel&m=114929015907507&w=2 The symptoms appear to be the same. The only way to tell for certain is to use a USB bus analyzer. Briefly, his problem was that the EHCI host controller in his computer sometimes does not send a particular type of packet (PING) when it is supposed to. It's a hardware bug, and we don't know what triggers it or how to make the driver work around it. Alan Stern
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