On Fri, 22 Oct 2004, Kyle Harris wrote: > Alan, > > When the system fails, ps shows khubd with a status of DW. I have verified > that the change makes it to hub_irq, but for whatever reason the hubd thread > is in uninterruptible sleep state. I can reproduce the failure by cat'ing > /proc/bus/usb/devices while performing a mount on the usbdrive. Below is a > log (not much info) with some additional debug statements from my hcd. The > "rh change 2 status 0" statement is from hub_status_data function. > > Thanks for your help. Kyle.
> Initializing USB Mass Storage driver... > usb-storage 1-1:1.0: usb_probe_interface > usb-storage 1-1:1.0: usb_probe_interface - got id > scsi0 : SCSI emulation for USB Mass Storage devices > Vendor: LEXAR Model: JUMPDRIVE SECURE Rev: 2000 > Type: Direct-Access ANSI SCSI revision: 02 > SCSI device sda: 248928 512-byte hdwr sectors (127 MB) > sda: assuming drive cache: write through > sda: sda1 > Attached scsi disk sda at scsi0, channel 0, id 0, lun 0 > USB Mass Storage device found at 2 > usbcore: registered new driver usb-storage > USB Mass Storage support registered. > usb 1-1: control timeout on ep0in <- ep0 timeout What program sent that message on ep0? Do you have something like gnome-pilot running that monitors USB devices? Or did it come from your "cat" process? > dequeue status -104 > ezhost_usb_reset sie 0 port 0(0) <- device unplugged > ezhost_usb_reset1 sie 0 port 0(0) > ezhost_usb_reset2 sie 0 port 0(0) > ezhost_device_stat: 0380 > ezhost_device_stat: no device > rh change 2 status 0 <- hub_status_data reports change > rh change 2 status 0 > usb 1-1: control timeout on ep0in Again, who sent this message? > dequeue status -104 > rh change 2 status 0 Also, what does a Alt-SysRq-T stack trace show for the khubd process? And for the usb-storage and scsi-eh processes? Finally, what other activities are you doing? You said that you tried to mount the USB drive and to cat /proc/bus/usb/devices. In what order? What does the stack backtrace show for those processes? Does either of them run to completion? If you turn on the usb-storage verbose debugging option in the kernel configuration, what additional information shows up in the system log? Alan Stern ------------------------------------------------------- This SF.net email is sponsored by: IT Product Guide on ITManagersJournal Use IT products in your business? Tell us what you think of them. Give us Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more http://productguide.itmanagersjournal.com/guidepromo.tmpl _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
