On Sat, 2009-03-07 at 22:22 +0200, Maxim Levitsky wrote: > On Sat, 2009-03-07 at 11:52 -0800, Greg KH wrote: > > On Sat, Mar 07, 2009 at 09:20:44PM +0200, Maxim Levitsky wrote: > > > Hi, > > > > > > Short summary: > > > > > > I have HP1018 printer, and it works well in windows. > > > When I use in in linux, I often see messages like: > > > > > > usbfs: USBDEVFS_CONTROL failed cmd python rqt 128 rq 6 len 255 ret -110 > > > > > > This is using hp backend that talks to printer using usbfs. > > > I also tried usblp, but it just doesn't say anything in kernel log. I > > > think it silently ignores similar errors, because the end result is the > > > same, the printer sometimes works, but sometimes doesn't. > > > (printer needs firmware to be uploaded to it, and I do upload it). > > > > > > On the other hand, IF I remove _ether_ ehci-hcd or uhci-hcd from kernel, > > > then everything works fine, I already rebooted the printer many times, > > > used it to print, upload firmware, and everything just work, but as soon > > > as I load the second driver it fails in same way again. > > > > > > USB issues with this class of printers are nothing but new, for example > > > see: > > > > > > http://foo2zjs.rkkda.com/forum/read.php?9,374 > > > https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.15/+bug/54419 > > > > What kernel version are you using? > > > > > I compiled without CONFIG_USB_EHCI_ROOT_HUB_TT > > > and it did help (didn't that much testing, but at least firmware loads > > > ok, and no error messages) > > > > Can you provide the full kernel log messages from when you plug in your > > printer? Are there any other messages saying that you need to be sure > > to load one driver before the other? > I am familiar with these messages, maybe instead uhci should depend on > ehci or something like that? > > Tommorow I try to load them manually in correct order. > Btw, if I unload both and then load first ehci then uhci, this is ok > (if they were loaded incorrectly) > > > Confirm again that without CONFIG_USB_EHCI_ROOT_HUB_TT both drivers > work. > > dmesg (from /var/log/kern.log.0) attached > It shows how I rebooted the printer often. > It also have this error message about the order. > > But this isn't related. > I currently blacklisted uhci-hcd, so only ehci-hcd gets loaded. > Then I loaded the uhci, and got same bug > (This is why I attached an older dmesg, if you need I reproduce that bug > again) > > > To be clear, usually after these error messages (... -110), printer > stops working, it is so confused, all attempts to access it hang. > Only reboot helps. And of course, forgot, kernel is vanilla 2.6.28 with compat-wireless patches. Best regards, Maxim Levitsky -- 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
