On Tue, 28 May 2013, Grant wrote: > OK good point. In light of this, here's the real problem. Ejecting > the SSD results in the "Writing data to device" desktop notification > persisting on the desktop instead of disappearing after a few seconds > like it does with my other external drives. The following messages > appears in dmesg which does not appear when ejecting my other external > drives: > > sd 8:0:0:0: [sdb] Synchronizing SCSI cache > sd 8:0:0:0: Device offlined - not ready after error recovery > > Unplugging and replugging the device does not result in the > reappearance of the /dev/sdb device file like it does with my other > external drives. The only way to bring the /dev/sdb device file back > is to 'modprobe -r xhci_hcd && modprobe xhci_hcd'. > > I originally wrote a problem report like this but then I convinced > myself that the *real* problem was the one I described in my previous > message which Greg proved it is not. There are two things you can do to help diagnose this. One is to build a kernel with CONFIG_USB_DEBUG enabled and then post the portion of the dmesg log showing what happens when you eject, unplug, and replug the device. The other is to capture and post a usbmon trace of the same sequence of events. See Documentation/usb/usbmon.txt. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
