Hi Pawel,
If you are comfortable with re-compiling/editing source, please enable
DEBUG, RD_DATA_DUMP, and WR_DATA_DUMP in scanner.h, configure syslog to
capture debug output, and send me the output when you run the test
program described below.
Regards,
/\/elson
On Wed, 14 Jun 2000, Pawel Salek wrote:
> Hello,
>
> my problem is following: I try to use Epson 1200U USB scanner and get
> communication(?) errors. I tried different kernels (I use currently
> 2.4.0-test1-ac15) and different computers (Gateway GP7-550 and IBM
> 300GL) but it fails in all the cases no matter if I use UHCI or
> UHCI-alt driver. From /dev/bus/usb/devices I conclude that the scanner
> is recognized:
>
> T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
> B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
> D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
> P: Vendor=0000 ProdID=0000 Rev= 0.00
> S: Product=USB UHCI-alt Root Hub
> S: SerialNumber=ff00
> C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA
> I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
> E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms
> T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
> D: Ver= 1.00 Cls=ff(vend.) Sub=ff Prot=ff MxPS=64 #Cfgs= 1
> P: Vendor=04b8 ProdID=0104 Rev= 1.03
> S: Manufacturer=EPSON
> S: Product=Perfection1200
> C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 2mA
> I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=usbscanner
> E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
> E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
>
> When I realized that sane doesn't work out of the box, I asked Karl Heinz for
> help and he sent me attached program for testing the communication. The output
> is:
>
> Opening /dev/usb/scanner0...
> writing sequence...
> reading ack message.
> read 1 bytes
> Asking for ident string.
> REading answer...
> read 1 bytes of ident
> Did not receive STX
> in_buf[0] = 0x15
>
> It basically means that the scanner reset is successful but when asked for
> identity string, the scanner or the scanner module answers NAK.
>
> Has anyone seen it, too? Any clues? What is the best approach to debug this
> problem (I know how to debug ordinary programs, but never tried to debug kernel, or
> kernel modules). Is there any other information you would like to get?
>
> /Pawel
>
--
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