Messages in this thread | | | Subject | [BUG] Loading both ehci-hcd and uhci-hcd drivers causes my printer to fail | From | Maxim Levitsky <> | Date | Sat, 07 Mar 2009 21:20:44 +0200 |
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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
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)
Looking for your comments, Best regards, Maxim Levitsky
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