Le lundi 26 mai 2008 ? 19:12 -0400, m. allan noah a ?crit : > two random thoughts- > > 1. can he try 32 bit kernel on same exact machine, just to rule out > hardware problems?
Good point, and to try other USB ports on the same machine, that needs to be confirmed first as it could be a HW issue > 2. is there a pattern to the timeouts, like always same number of > errors before a good packet? It looks to be a repetitive pattern, i.e. error occurs on a second "read" sequence when reading image data, but occurs also sometimes with smaller transaction control messages (write message, then read response immediately). I've asked to give a try with a small tempo between two successive image data readings, but do not have feedback yet. Thanks Nicolas > allan > > On 5/26/08, Nicolas <nicolas.martin at freesurf.fr> wrote: > > Sam V. posted recently a bug report with a 64 bits kernel, running the > > pixma backend and a MF-4270 Canon MFP. > > > > Details here: > > > > > > https://alioth.debian.org/tracker/?group_id=30186&atid=410366&func=detail&aid=310861 > > > > He has the pixma backend running fine with a 32 bits kernel (same > > version as 64 bits) in same conditions. > > > > On a 64 bits 2.6.25 kernel (Fedora 9) or 2.6.24 (Ubuntu), the logs show > > that sometimes (but not always, that's why scanning finally works, but > > takes very long time), there appears to be a: > > > > "Resource temporarily unavailable" > > > > error for read calls, from either sanei_usb_read_int() or > > sanei_usb_read_bulk(). They are triggered by usb_bulk_read() or > > usb_interrupt_read() calls from libusb. > > > > This error induces the timeouts, thus long scanning time. > > > > There do not appear to be errors on write calls (this would make > > scanning fail). > > > > I don't know what could cause this libusb error for the 64 bits kernel ? > > > > Anyone here already experienced this, or would have a clue ? > > > > 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 > > > > > -- > "The truth is an offense, but not a sin" >
