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* [BUG] Loading both ehci-hcd and uhci-hcd drivers causes my printer to fail
@ 2009-03-07 19:20 Maxim Levitsky
  2009-03-07 19:52 ` Greg KH
  0 siblings, 1 reply; 17+ messages in thread
From: Maxim Levitsky @ 2009-03-07 19:20 UTC (permalink / raw)
  To: Alan Stern; +Cc: linux-usb, linux-kernel

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



^ permalink raw reply	[flat|nested] 17+ messages in thread

end of thread, other threads:[~2009-03-09 20:02 UTC | newest]

Thread overview: 17+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2009-03-07 19:20 [BUG] Loading both ehci-hcd and uhci-hcd drivers causes my printer to fail Maxim Levitsky
2009-03-07 19:52 ` Greg KH
2009-03-07 20:22   ` Maxim Levitsky
2009-03-07 20:23     ` Maxim Levitsky
2009-03-08  0:55     ` Maxim Levitsky
2009-03-08  3:27     ` Alan Stern
2009-03-08 16:09       ` Maxim Levitsky
2009-03-08 16:58         ` Alan Stern
2009-03-09 10:07           ` Maxim Levitsky
2009-03-09 12:26             ` Maxim Levitsky
2009-03-09 14:53               ` Alan Stern
2009-03-09 15:57                 ` Maxim Levitsky
2009-03-09 16:15                   ` Alan Stern
2009-03-09 18:59                     ` Maxim Levitsky
2009-03-09 19:12                       ` Alan Stern
2009-03-09 19:51                         ` Maxim Levitsky
2009-03-09 20:02                           ` Maxim Levitsky

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