Bug 7782 - USB communication with Kyocera FS 820 fails when reading printer ID
USB communication with Kyocera FS 820 fails when reading printer ID
Product: Drivers
Classification: Unclassified
Component: USB
i386 Linux
: P2 normal
Assigned To: Greg Kroah-Hartman
Depends on:
  Show dependency treegraph
Reported: 2007-01-06 13:02 UTC by Martin Williges
Modified: 2007-08-15 01:17 UTC (History)
0 users

See Also:
Kernel Version:, 2.6.18.x, older versions likely
Tree: Mainline
Regression: ---


Description Martin Williges 2007-01-06 13:02:00 UTC
Remark: For this bug there is a patch already in -mm and -grekh trees. This 
bug report works as a reminder.

Most recent kernel where this bug did *NOT* occur:

gentoo with gentoo-sources / vanilla kernel

Hardware Environment:
x86 (Athlon XP 2400+), NEC USB Card (1033:0035), Kyocera Mita FS 820

Software Environment:
gentoo linux (i686), udev 103, cups 1.2.6 / 1.2.7

Problem Description:
since cups 1.2, cups requests the printer ID before adding a printer and 
before each print job. The Kyocera FS 820 seems to have a problem with ID 
requests - it does not answer the request unless there has been communication 
just before (e.g. plugging in)


strace output:
/usr/libexec/cups/backend # strace -e raw=ioctl /usr/libexec/cups/backend/usb
open("/dev/usb/lp0", O_RDWR|O_EXCL|O_LARGEFILE) = 3
ioctl(0x3, 0x84005001, 0xbfc397b1)      = -1 (errno 5)
close(3)                                = 0

usbmon log:
de8fbac0 2123539163 S Bi:003:02 -115 8192 <
ddba3860 2123539196 S Ci:003:00 s a1 00 0000 0000 03ff 1023 <
ddba3860 2128538251 C Ci:003:00 -104 0
de8fbac0 2128539243 C Bi:003:02 -2 0

lkml: http://lkml.org/lkml/2006/12/22/62
lkml: http://lkml.org/lkml/2006/12/28/163
private homepage: http://www.zut.de/kyocerafs820.html

possibly related:

patch that fixes mentined behaviour:
To get the printer working, it can be added to the list of "quirky printers" 
in usblp.c:

--- a/drivers/usb/class/usblp.c
+++ b/drivers/usb/class/usblp.c
@@ -217,6 +217,7 @@ static const struct quirk_printer_struct quirk_printers[] 
= {
Comment 1 Daniel Drake 2007-01-07 13:06:36 UTC
Hmm, I didn't realise this patch was already merged. To me it seems like the
wrong approach, since the USB read *does* succeed a lot of the time. Instead we
should at least identify the problem before accepting a workaround...
Comment 2 Natalie Protasevich 2007-08-11 10:59:49 UTC
Any updates on this problem?
Comment 3 Martin Williges 2007-08-15 01:17:09 UTC
Fix made it into mainline, works at least for me, heard no other comments about it.

Note You need to log in before you can comment on or make changes to this bug.