Woohoo! Partial success. Updates at http://waddles.org/content/sane-canon-mp730-driver
Perhaps the discussion of sanei_usb belongs in a different thread :) Cheers, Wade. 2009/4/19 Nicolas Martin <nicolas.martin at freesurf.fr> > Maybe there's some relation with the endpoint, but remember that all > PIXMA devices have also different endpoints for storage, printer and > scanner, and there's no issue so far with messing those devices. > So this requires anyway deeper analysis, but filtering out usb classes > in sanei_usb is a good precaution. > > BTW, we really read your posts and try to figure out where there's > something wrong, but as you can understand, this usb issue is not > trivial. > > Nicolas > > Le dimanche 19 avril 2009 ? 03:46 +1000, Wade Fitzpatrick a ?crit : > > The patch should apply to current if somebody wants to test it. I just > > don't know how many scanners might be attached to Printer or Mass > > Storage devices' interfaces so I deliberately left it simple, but the > > extra debug info was certainly helpful. > > > > Glad to see somebody is still reading my post, anyway. Thanks. > > > > Wade. > > > > m. allan noah wrote: > > > though i must chime in that wade's latest post is very interesting- it > > > does appear that sanei_usb grabs the wrong interface. I believe Ilia > > > had a complaint about this as well. Sounds like sanei_usb needs an > > > overhaul after our next release. > > > > > > allan > > > > > > On Sat, Apr 18, 2009 at 12:57 PM, Nicolas Martin > > > <nicolas.martin at freesurf.fr> wrote: > > > > > > > Wade, > > > > > > > > As far as I can see, you are experiencing a usb interrupt transfer > > > > issue, same kind as happened to other people when running the pixma > > > > backend on an ASUS router or also on MAC OS X. > > > > > > > > What is important to know is that the pixma backend - and this is due > to > > > > Canon's PIXMA devices - make use of both usb Bulk read/write > transfers, > > > > and also of usb Interrupt read transfers. > > > > > > > > It is compulsory that usb interrupt read transfers fully work to > operate > > > > the pixma backend, as the scanner (and more especially older PIXMA > > > > devices, like MP730) uses those transfer to exchange : > > > > - status information > > > > - time request > > > > - button scan information > > > > > > > > Today's PIXMA devices (that uses a generation 3 protocol) uses both, > but > > > > can work without interrupt read ; in this case, only button scan will > be > > > > disabled, but the scanner can be entirely driven with Bulk transfers. > > > > This is not the case for MP730, a generation 2 protocol device, which > > > > requires usb interrupt read transfers to be operated. > > > > > > > > There's a difference also between the usb lib used by Sane, and the > one > > > > used in the pixma Standalone driver. Sane uses libusb, based on ioctl > > > > calls to the kernel to execute usb transfers, while standalone driver > > > > uses usbdevfs. > > > > > > > > In order to help you and step further, could you tell us which Linux > > > > distribution (and version) you are running ? > > > > > > > > $ uname -a > > > > > > > > As I told before, this kind of issue was due on MAC OS X to the > darwin > > > > libusb port, not handling timeouts in interrupt reads, and for the > ASUS > > > > router, use of a (very) old kernel 2.4.20 version, known to be buggy > for > > > > usb interrupt reads. > > > > > > > > Nicolas > > > > > > > > > > > > Le samedi 18 avril 2009 ? 09:01 +1000, Wade Fitzpatrick a ?crit : > > > > > > > > > I have updated my findings at > > > > > http://waddles.org/content/sane-canon-mp730-driver > > > > > > > > > > Can someone suggest the next place to start work? > > > > > > > > > > Thanks, > > > > > Wade. > > > > > > > > > > 2009/4/4 Nicolas Martin <nicolas.martin at freesurf.fr> > > > > > Sorry, posted answer in wrong thread. > > > > > > > > > > As far as I can see in the differences between older > versions > > > > > of the > > > > > pixma standalone driver and today's, concerning usb > exchanges > > > > > for MP730, > > > > > the older drivers did not use events polling whereas newer > do > > > > > with usb > > > > > interrupt reads. > > > > > > > > > > First, did you try to remove the PIXMA_CAP_EVENTS flag for > the > > > > > pixma 730 > > > > > declaration (at the botom of file pixma_mp730.c) and see > how > > > > > it > > > > > behaves ? > > > > > > > > > > I will also send you some modified files for the pixma > backend > > > > > to > > > > > investigate why this usb low level error appears. > > > > > > > > > > Nicolas > > > > > > > > > > Le vendredi 03 avril 2009 ? 03:14 +1100, Wade Fitzpatrick a > > > > > ?crit : > > > > > > > > > > > Can you take a look at the logs on > > > > > > http://waddles.org/content/sane-canon-mp730-driver and > tell > > > > > me if you > > > > > > think I'm on the right track with the endpoints? > > > > > > > > > > > > I CBF re-installing Windows, but I did test a successful > > > > > scan with > > > > > > mp150-0.12.2 followed immediately by a try with > pixma-0.15.0 > > > > > but it > > > > > > failed so I doubt it has anything to do with power-saving > > > > > modes. > > > > > > > > > > > > Thanks, > > > > > > Wade. > > > > > > > > > > > > 2009/3/21 Nicolas Martin <nicolas.martin at freesurf.fr> > > > > > > Seems confirmed that a usb low level error > happens > > > > > on first > > > > > > write > > > > > > attempt: > > > > > > > > > > > > [sanei_usb] sanei_usb_write_bulk: trying to write > 10 > > > > > bytes > > > > > > [sanei_usb] 000 F3 20 00 00 00 00 00 00 0C > > > > > > 00 . ........ > > > > > > USB error: error submitting URB: Device or > resource > > > > > busy > > > > > > [sanei_usb] sanei_usb_write_bulk: write failed: > > > > > Device or > > > > > > resource busy > > > > > > USB error: could not clear/halt ep 1: Device or > > > > > resource busy > > > > > > > > > > > > [pixma] WARNING:pixma_write(): count(0) != > len(10) > > > > > > > > > > > > > > > > > > I remember having seen this before for someone > else, > > > > > this > > > > > > happened when > > > > > > the usb port was going to power saving (generally > > > > > after a few > > > > > > seconds) > > > > > > > > > > > > Could it be the case on system ? > > > > > > > > > > > > Nicolas > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > sane-devel mailing list: sane-devel at lists.alioth.debian.org > > > > http://lists.alioth.debian.org/mailman/listinfo/sane-devel > > > > Unsubscribe: Send mail with subject "unsubscribe your_password" > > > > to sane-devel-request at lists.alioth.debian.org > > > > > > > > > > > > > > > > > > > > > > > -------------- next part -------------- An HTML attachment was scrubbed... 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