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Hi All,<br>
<br>
Sorry for my late response. And sorry again, I'm very busy on my new
job and I can only sometimes look into the mailing list. It's more
secure to set me on cc, if you want to address me.<br>
<br>
It seems that we have a general problem in the Pixma backend. During
the past months, several people reported timeouts resp. hang
problems with their scanners. <br>
<br>
I also had such problems with my new USB3 card, but as I found time
to solve this problem, it has been gone by itself...<br>
<br>
Now let's start with troubleshooting.<br>
<br>
(1) Please try different frontends, if you have problems with
scanning. Some users reported problems with scanimage, but xsane is
working.<br>
<br>
(2) If you're checking USB scanning, always switch off | disable |
disconnect all ethernet | WiFi connections from your scanner.<br>
<br>
(3) If you're checking ethernet | WiFi connection, always disconnect
USB from your scanner. And don't mix ethernet and WiFi.<br>
<br>
(4) What's the lastest status of USB only scanning from flatbed?
This is the base function and should always run without any
problems.<br>
<br>
(5) If flatbed scans are running and if you have problems with adf,
we need to check the usb protocols. Please create log files for
single page and 2-page scans with 'export SANE_DEBUG_PIXMA=11'. And
to reduce log files sizes, please scan only small image areas of
about 5mm x 5mm. Background: All pages are scanned in one scan
session. We need to check if the scan session will be closed after
the last page resp. after detecting paper empty with 10s timeout.<br>
<br>
I prepared 2 patches for you, if your scanner hangs at the end of a
scan. Or if your scanner doesn't want to scan a 2nd time without
repowering. Exclude item (5). Please try only one patch at one time,
and revoke it before you want to try the other one.<br>
<br>
(6) I found an old patch, I got about 3 years ago as a bug fix
(3c5cc2a). There is an EOF declared as an error! The original patch
was for USB only, but has been extended for all protocols with a
later patch. Attached patch file pixma_io_sanei.c.patch revokes the
old patches.<br>
<br>
(7) Due to the reported issue that sometimes xsane is working and
scanimage doesn't, I found out that the method mp150_finish_scan()
in pixma_mp150.c will be called twice: (a) At the end of the scan
and (b) called from scanimage (I didn't investigated other frontends
than scanimage). Existing code can create communication problems
with the scanner, if calling (b) is faster than (a) is ready. I'm
not sure, if this could really happen. Attached patch file
pixma_mp150.c.patch fixes this issue. I also prepared a patch file
for the Pixma CCD scanners (pixma_mp810.c.patch).<br>
<br>
Please report your results and|or respond your suggestions.<br>
<br>
Cheers,<br>
Rolf<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">Am 03.03.2015 um 22:49 schrieb Troels
Thomsen:<br>
</div>
<blockquote
cite="mid:%3CCANAA4oYnMBz+Mh+dH9G2zb42rsBhjz2PhMAG1LwsE7tu3+aA4A@mail.gmail.com%3E"
type="cite">
<div dir="ltr">
<div>Hi Martin, <br>
<br>
<div>Good work Martin!<br>
</div>
<div>Any missing commands would be a smoking gun imho.<br>
</div>
<br>
Rolf, are you following this thread ?<br>
<br>
</div>
/Troels<br>
<div><br>
<br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2015-02-24 23:09 GMT+01:00 Martin <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:martin.gu@intergga.ch" target="_blank">martin.gu@intergga.ch</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Troels<br>
<br>
I don't have access to another computer. But I have
installed OpenSUSE 13.2<br>
and the result is the same as on 13.1.<br>
I did not (yet) test with short delays between the commands,
but I compared<br>
the communication of the Canon software scangear on Windows
with the one of<br>
SANE:<br>
<br>
At start ScanGear sends the following (linebreaks added by
me):<br>
<?xml version="1.0" encoding="utf-8" ?><br>
<cmd xmlns:ivec="<a moz-do-not-send="true"
href="http://www.canon.com/ns/cmd/2008/07/common/"
target="_blank">http://www.canon.com/ns/cmd/2008/07/common/</a>"<br>
xmlns:vcn="<a moz-do-not-send="true"
href="http://www.canon.com/ns/cmd/2008/07/canon/"
target="_blank">http://www.canon.com/ns/cmd/2008/07/canon/</a>"><br>
<ivec:contents><ivec:operation>VendorCmd</ivec:operation><br>
<ivec:param_set servicetype="scan"><br>
<ivec:jobID> </ivec:jobID><br>
<vcn:ijoperation>ModeShift</vcn:ijoperation><br>
<vcn:ijmode>1</vcn:ijmode><br>
</ivec:param_set><br>
</ivec:contents><br>
</cmd><br>
<br>
response:<br>
<?xml version="1.0" encoding="utf-8" ?><br>
<cmd xmlns:ivec="<a moz-do-not-send="true"
href="http://www.canon.com/ns/cmd/2008/07/common/"
target="_blank">http://www.canon.com/ns/cmd/2008/07/common/</a>"<br>
xmlns:vcn="<a moz-do-not-send="true"
href="http://www.canon.com/ns/cmd/2008/07/canon/"
target="_blank">http://www.canon.com/ns/cmd/2008/07/canon/</a>"><br>
<ivec:contents><br>
<ivec:operation>VendorCmdResponse</ivec:operation><br>
<ivec:param_set servicetype="scan"><br>
<ivec:response>OK</ivec:response><br>
<ivec:response_detail/><br>
<vcn:ijoperation>ModeShiftResponse</vcn:ijoperation><br>
<vcn:ijresponse>OK</vcn:ijresponse><br>
<vcn:ijresponse_detail/><br>
</ivec:param_set><br>
</ivec:contents><br>
</cmd><br>
<br>
ScanGear starts a scan with the following command sequece:<br>
<?xml version="1.0" encoding="utf-8" ?><br>
<cmd xmlns:ivec="<a moz-do-not-send="true"
href="http://www.canon.com/ns/cmd/2008/07/common/"
target="_blank">http://www.canon.com/ns/cmd/2008/07/common/</a>"><br>
<ivec:contents><br>
<ivec:operation>StartJob</ivec:operation><br>
<ivec:param_set servicetype="scan"><br>
<ivec:jobID>00000001</ivec:jobID><br>
<ivec:bidi>1</ivec:bidi><br>
</ivec:param_set><br>
</ivec:contents><br>
</cmd><br>
<br>
response:<br>
<?xml version="1.0" encoding="utf-8" ?><br>
<cmd xmlns:ivec="<a moz-do-not-send="true"
href="http://www.canon.com/ns/cmd/2008/07/common/"
target="_blank">http://www.canon.com/ns/cmd/2008/07/common/</a>"><br>
<ivec:contents><br>
<ivec:operation>StartJobResponse</ivec:operation><br>
<ivec:param_set servicetype="scan"><br>
<ivec:response>OK</ivec:response><br>
<ivec:response_detail/><br>
<ivec:jobID>00000001</ivec:jobID><br>
</ivec:param_set><br>
</ivec:contents><br>
</cmd><br>
<br>
command:<br>
<?xml version="1.0" encoding="utf-8" ?><br>
<cmd xmlns:ivec="<a moz-do-not-send="true"
href="http://www.canon.com/ns/cmd/2008/07/common/"
target="_blank">http://www.canon.com/ns/cmd/2008/07/common/</a>"<br>
xmlns:vcn="<a moz-do-not-send="true"
href="http://www.canon.com/ns/cmd/2008/07/canon/"
target="_blank">http://www.canon.com/ns/cmd/2008/07/canon/</a>"><br>
<ivec:contents><br>
<ivec:operation>VendorCmd</ivec:operation><br>
<ivec:param_set servicetype="scan"><br>
<ivec:jobID>00000001</ivec:jobID><br>
<vcn:ijoperation>ModeShift</vcn:ijoperation><br>
<vcn:ijmode>1</vcn:ijmode><br>
</ivec:param_set><br>
</ivec:contents><br>
</cmd><br>
<br>
response: some data<br>
<br>
command:<br>
<?xml version="1.0" encoding="utf-8" ?><br>
<cmd xmlns:ivec="<a moz-do-not-send="true"
href="http://www.canon.com/ns/cmd/2008/07/common/"
target="_blank">http://www.canon.com/ns/cmd/2008/07/common/</a>"><br>
<ivec:contents><br>
<ivec:operation>EndJob</ivec:operation><br>
<ivec:param_set servicetype="scan"><br>
<ivec:jobID>00000001</ivec:jobID><br>
</ivec:param_set><br>
</ivec:contents><br>
</cmd><br>
<br>
response:<br>
<?xml version="1.0" encoding="utf-8" ?><br>
<cmd xmlns:ivec="<a moz-do-not-send="true"
href="http://www.canon.com/ns/cmd/2008/07/common/"
target="_blank">http://www.canon.com/ns/cmd/2008/07/common/</a>"><br>
<ivec:contents><br>
<ivec:operation>EndJobResponse</ivec:operation><br>
<ivec:param_set servicetype="scan"><br>
<ivec:response>OK</ivec:response><br>
<ivec:response_detail/><br>
<ivec:jobID>00000001</ivec:jobID><br>
</ivec:param_set><br>
</ivec:contents><br>
</cmd><br>
<br>
SANE does not send the VendorCmd. Do you think incorporating
the missing<br>
command sequence could solve the issue? I do not want to
damage my MG7550 with<br>
wrong commands, that's why I am reluctant to experiment with
code-changes.<br>
<br>
Many thanks for your help<br>
Martin<br>
<br>
Am Sonntag, 11. Januar 2015, 14.52:06 schrieb Troels
Thomsen:<br>
<div class="HOEnZb">
<div class="h5">> Martin,<br>
> ad 1)<br>
> I'm sorry I have no understanding of the protocol
what so ever, and have<br>
> spent max ½ hour in the code, to see what the
patches I was sent, did.<br>
> ad 2)<br>
> I agree , this IS strange ...<br>
> ad 3)<br>
> I agree , this IS strange ...<br>
> ad 4)<br>
> Frankly, you have so many strange phenomenons going
on, so ... you could<br>
> try....<br>
> (not that this a satisfactory solution at all...)<br>
><br>
> At this point, I think I would try to test it on
another computer, to see<br>
> if all these really strange phenomenons (e.g.
'enabling Ethernet on the<br>
> device, makes usb scanning work' ) somehow is
related to hardware or the<br>
> Linux installation. Just to make sure....<br>
><br>
> Sorry, its not much help.<br>
><br>
> /Troels<br>
><br>
> 2015-01-07 23:26 GMT+01:00 Martin <<a
moz-do-not-send="true"
href="mailto:martin.gu@intergga.ch">martin.gu@intergga.ch</a>>:<br>
> > Troels<br>
> ><br>
> > I agree with you, we have to be careful on the
test methodology.<br>
> > My knowledge in c is limited since I wrote my
last c-program about 20<br>
> > years<br>
> > ago. But I could try.<br>
> > But before trying to modify the source code I
have some questions:<br>
> ><br>
> > 1) Did you analyze the USB-calls of the
Canon-software on windows and<br>
> > compare<br>
> > them to the SANE-sequence? What is the meaning
of the first sequece 55 53<br>
> > 42<br>
> > 43 F0 36 04 0B...?<br>
> ><br>
> > 2) What is the difference between scanimage
and xsane? Is it only the<br>
> > timing?<br>
> ><br>
> > 3) What is the difference between xsane and
the gimp plugin? Is it only<br>
> > the<br>
> > timing? Why does the gimp plugin only work
after xsane?<br>
> ><br>
> > 4) Would it be worth while to make a few tests
with the printer mode, i.e.<br>
> > to<br>
> > try to start xsane after printing?<br>
> ><br>
> > Martin<br>
> ><br>
> > > > If the scanner does not work on a
USB port it is quite unlikely to<br>
> > > > work<br>
> > > > over the network: the bjnp network
code just carries the USB exchange<br>
> > > > over IP.<br>
> > ><br>
> > > I mostly agree, though Rolf asks
specifically for the USB trace, because<br>
> > > (as I understood) it differs slightly
from the IP traces I had already<br>
> > > submitted.<br>
> > > (fix usb first , then patch it for IP, if
need be)<br>
> > ><br>
> > > One advice:<br>
> > > Be very paranoid on your test
methodology. I looked stupid a couple of<br>
> > > times (sorry Rolf!), because I was fooled
by the USB interface and/or<br>
> > > the<br>
> > > Canon firmware.<br>
> > > When testing a new patch, I tried some
settings in random (DPI ,<br>
> > > colour/black-n-white etc) and reported
the success/failures.<br>
> > > BUT the thing is, that the Canon MF8230
firmware can go into bad-mode,<br>
> ><br>
> > when<br>
> ><br>
> > > it has received some strange commands,
and the following scans might<br>
> > > work<br>
> > > slightly strange for that reason. I was
even fooled by the phenomenon,<br>
> ><br>
> > that<br>
> ><br>
> > > scanning a 1 by 1 cm square works, but
scanning the whole A4 didn't.<br>
> ><br>
> > (Well<br>
> ><br>
> > > ... there WERE some differences between
what worked through USB and IP<br>
> > > at<br>
> > > this point in time. I'm guessing it was
something timing-critical, but I<br>
> > > never dissected that last patch from Rolf
which fixed it)<br>
> > ><br>
> > > So I started rebooting the scanner
whenever I was in doubt.<br>
> > > (disconnect/connect the USB interface
plus move Cannon unit from to<br>
> > > "printer mode" and back to "scanner mode"
was normally enough)<br>
> > ><br>
> > ><br>
> > > So what do we do? / What is status?<br>
> > ><br>
> > > Since scanning CAN work , one could argue
the back-end DOES send all the<br>
> > > necessary+correct commands to the
printer.<br>
> > > If timing is the critical parameter
(backed by the fact that something<br>
> > > as<br>
> > > stupid as enabling IP on the
printer-side, suddenly makes it work now<br>
> > > and<br>
> > > then), maybe we should try to insert an
ugly time-delay before every USB<br>
> > > write? If that changes anything to the
better, we can start to hunt down<br>
> > > where it is really necessary, and
hopefully find a nicer approach<br>
> > > afterwards?<br>
> > ><br>
> > > Martin, are you comfortable with pulling
the code out of the GIT<br>
> > > repository, compile , install and
experiment with inserting delays?<br>
> > > I think there is something called "SANE
interface USB" sanei_usb.c/h.<br>
> ><br>
> > That<br>
> ><br>
> > > was maybe a place to start.<br>
> > ><br>
> > > Louis, what is the odds of success for
this approach?<br>
> > ><br>
> > > :-)<br>
> > ><br>
> > > /Troels<br>
> > ><br>
> > > 2015-01-03 20:43 GMT+01:00 Martin <<a
moz-do-not-send="true"
href="mailto:martin.gu@intergga.ch">martin.gu@intergga.ch</a>>:<br>
> > > > Am Samstag, 3. Januar 2015, 11.16:10
schrieb Louis Lagendijk:<br>
> > > > > On Fri, <a
moz-do-not-send="true" href="tel:2015-01-02"
value="+4520150102">2015-01-02</a> at 22:59 +0100,
Martin wrote:<br>
> > > > > > Hi Troels<br>
> > > > > ><br>
> > > > > > > *Is it USB3 (on the
computer)?<br>
> > > > > ><br>
> > > > > > no, it is USB2<br>
> > > > > ><br>
> > > > > > > *Do you have access
to another computer, where you can try it -<br>
> ><br>
> > Does<br>
> ><br>
> > > > it<br>
> > > ><br>
> > > > > > > work excactly the
same strange way ... ?<br>
> > > > > ><br>
> > > > > > No,I don't have access to
another computer. But I have also<br>
> ><br>
> > Windows 7<br>
> ><br>
> > > > > > installed. With Windows 7
and the Canon-software it works OK.<br>
> > > > > ><br>
> > > > > > > *Does unit have
ethernet connection / can you try that way?<br>
> > > > > ><br>
> > > > > > Yes. With the ethernet
connection the printer works. Thus the<br>
> > > ><br>
> > > > IP-address<br>
> > > ><br>
> > > > > > below is correct.<br>
> > > > > > But I cannot access the
scanner.<br>
> > > > > ><br>
> > > > > > xsane
pixma:MG7500_192.168.0.3<br>
> > > > > ><br>
> > > > > > results in the error
message "illegal argument". Same thing with<br>
> > > > > ><br>
> > > > > > scanimage --help -d
bnjp://<a moz-do-not-send="true"
href="http://192.168.0.3:8612" target="_blank">192.168.0.3:8612</a><br>
> > > > ><br>
> > > > > Hi Martin<br>
> > > > > If the scanner does not work on
a USB port it is quite unlikely to<br>
> ><br>
> > work<br>
> ><br>
> > > > > over the network: the bjnp
network code just carries the USB<br>
> > > > > exchange<br>
> > > > > over IP.<br>
> > > > > Anyhow, you can find the name
with scanimage -L (but make sure that<br>
> ><br>
> > port<br>
> ><br>
> > > > > 8612 is not blocked by a
firewall (see the man-page for sane-pixma<br>
> > > > > in<br>
> > > > > the latest sources from GIT.
you need to enable port 8612 for both<br>
> > > > > incoming and outgoing traffic.<br>
> > > > ><br>
> > > > > Louis<br>
> > > ><br>
> > > > Hi Louis<br>
> > > ><br>
> > > > The necessary ports on the firewall
are open, yet scanimage -L does<br>
> > > > not<br>
> > > > find<br>
> > > > the scanner.<br>
> > > ><br>
> > > > But this lead to another discovery:<br>
> > > > I enabled LAN on the MG7550. And
although the unit is connected via<br>
> ><br>
> > USB 2<br>
> ><br>
> > > > xsane sometimes works?! But with LAN
disabled xsane never works<br>
> > > > without<br>
> > > > prior<br>
> > > > scanimage -T. And once xsane or
scanimage -T failed all succeeding<br>
> ><br>
> > calls<br>
> ><br>
> > > > fail<br>
> > > > until the scanner is switched off
and on again.<br>
> > > ><br>
> > > > Log of xsane working:<br>
> > > > [sanei_debug] Setting debug level of
pixma to 21.<br>
> > > > [pixma] pixma is compiled with
pthread support.<br>
> > > > [pixma] pixma version 0.17.13<br>
> > > > [pixma] pixma_collect_devices()
found Canon PIXMA MG7500 Series at<br>
> > > > libusb:001:007<br>
> > > > [pixma] pixma_find_scanners() found
1 devices<br>
> > > > [pixma] pixma_collect_devices()
found Canon PIXMA MG7500 Series at<br>
> > > > libusb:001:007<br>
> > > > [pixma] pixma_open(): Canon PIXMA
MG7500 Series<br>
> > > > [pixma] *mp150_open***** This is a
generation 4 scanner. *****<br>
> > > > [pixma] [pixma] Reader task
id=139772037314304 (threaded)<br>
> > > > Reader task started<br>
> > > > [pixma]<br>
> > > > [pixma] pixma_scan(): start<br>
> > > > [pixma] line_size=4605
image_size=4895115 channels=3 depth=8<br>
> > > > [pixma] dpi=300x300 offset=(0,0)
dimension=1535x1063<br>
> > > > [pixma] gamma_table=0x1f201e0
source=0<br>
> > > > [pixma] threshold=127
threshold_curve=0<br>
> > > > [pixma] ADF page count: 0<br>
> > > > [pixma] OUT T=58.770 len=288<br>
> > > > [pixma] 00000000:3c 3f 78 6d 6c 20
76 65 72 73 69 6f 6e 3d 22 31<br>
> > > > [pixma] 00000010:2e 30 22 20 65 6e
63 6f 64 69 6e 67 3d 22 75 74<br>
> > > > ...<br>
> > > > Log of xsane not working:<br>
> > > > pixma] pixma_collect_devices() found
Canon PIXMA MG7500 Series at<br>
> > > > libusb:001:008<br>
> > > > [pixma] pixma_find_scanners() found
1 devices<br>
> > > > [pixma] pixma_collect_devices()
found Canon PIXMA MG7500 Series at<br>
> > > > libusb:001:008<br>
> > > > [pixma] pixma_open(): Canon PIXMA
MG7500 Series<br>
> > > > [pixma] *mp150_open***** This is a
generation 4 scanner. *****<br>
> > > > [pixma] INTR T=1.249 len=32<br>
> > > > [pixma] 00000000:00 00 00 01 00 00
00 00 00 00 00 00 00 00 00 00<br>
> > > > [pixma] 00000010:00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00<br>
> > > > [pixma]<br>
> > > > [pixma] Sending time: '15/01/03
15:32'<br>
> > > > [pixma] OUT T=1.250 len=36<br>
> > > > [pixma] 00000000:eb 80 00 00 00 00
00 00 00 00 00 00 00 00 00 14<br>
> > > > [pixma] 00000010:31 35 2f 30 31 2f
30 33 20 31 35 3a 33 32 00 00<br>
> > > > [pixma] 00000020:00 00 00 53<br>
> > > > [pixma]<br>
> > > > [pixma] IN T=21.251 len=-9<br>
> > > > [pixma] ERROR: ETIMEDOUT<br>
> > > > [pixma]<br>
> > > > ...<br>
> > > ><br>
> > > > Martin<br>
> > > ><br>
> > > ><br>
> > > > --<br>
> > > > sane-devel mailing list: <a
moz-do-not-send="true"
href="mailto:sane-devel@lists.alioth.debian.org">sane-devel@lists.alioth.debian.org</a><br>
> > > > <a moz-do-not-send="true"
href="http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel"
target="_blank">http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel</a><br>
> > > > Unsubscribe: Send mail with subject
"unsubscribe your_password"<br>
> > > ><br>
> > > > to <a
moz-do-not-send="true"
href="mailto:sane-devel-request@lists.alioth.debian.org">sane-devel-request@lists.alioth.debian.org</a><br>
> ><br>
> > --<br>
> > sane-devel mailing list: <a
moz-do-not-send="true"
href="mailto:sane-devel@lists.alioth.debian.org">sane-devel@lists.alioth.debian.org</a><br>
> > <a moz-do-not-send="true"
href="http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel"
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