On Mon, 9 Mar 2009, Maxim Levitsky wrote: > > Is your printer connected directly to the computer, or does it go > > through a hub? (If it is connected directly then EHCI_TT_NEWSCHED > > should not affect it at all.) > > > > If it does go through a hub, does it behave better when you attach it > > directly? > > > > Alan Stern > > > No, it is connected directly. > Just tried 'bad' driver, and firmware upload failed > > Do you mean that CONFIG_USB_EHCI_TT_NEWSCHED doesn't affect the driver > at all when no hub is presented? That's right. Transaction Translators (TTs) live inside hubs. If you don't use a hub then the TT code never runs. > Btw, at least according to lsusb -t, there are no internal hubs in the > printer. What does /proc/bus/usb/devices say? > But it can be a coincidence, it seems that with 'bad' driver printer > works 'better' to as it failed back few days ago much more often, maybe > cable is bad, don't know, but according to the web these printers > 1018/1020.. have usb problems, there is even a readme for that in > foo2zjz > > I try to use the 'good' driver > (without CONFIG_USB_EHCI_TT_NEWSCHED) for some time. Please don't forget to collect usbmon traces when the problem occurs. 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
