[sane-devel] Re: [linux-usb-devel] Yet another mail about libusb and scanner ;-)

[gerard klaver]

On Tue, 2004-04-20 at 16:02, syrius.ml@no-log.org wrote:
> Hi,
> 
> I'm trying to get my HP 4300C working.
> For that I'm using sane + the niash external backend.
> niash is compiled to work with libusb.
> 
> here are some informations:
> 
> debian sid + 2.6.5-mm6 kernel
> libsane is 1.0.13
> libusb is 0.1.8
> 
> (atm all commands are run as root)
> 
> After a fresh boot lsusb does not see the scanner.
> But it's present in /proc/bus/usb/device:
>  T:  Bus=02 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  5 Spd=12  MxCh= 0
>  D:  Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
>  P:  Vendor=03f0 ProdID=0305 Rev= 0.00
>  C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 48mA
>  I:  If#= 0 Alt= 0 #EPs= 3 Cls=10(unk. ) Sub=01 Prot=00 Driver=(none)
>  E:  Ad=81(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
>  E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
>  E:  Ad=83(I) Atr=03(Int.) MxPS=   1 Ivl=8ms
> 
> After running 'scanimage -h', lsusb sees the scanner:
>  Bus 002 Device 005: ID 03f0:0305 Hewlett-Packard ScanJet 4300c
> 
> the result of scanimage is:
>  scanimage: open of device niash:libusb:002:005 failed: Device busy
>  List of available devices:
>     niash:libusb:002:005
> 
> when i strace it, it shows:
>  ioctl(6, USBDEVFS_SETCONFIGURATION, 0xbfffead4) = -1 EPROTO (Protocol
>  error)
> and it doesn't produce a kernel error.
> 
> running testtool (correctly compiled for libusb):
>  # ./testtool
>   No NIASH chipset found!
>   _ProbeRegisters failed!
> 
> stracing it shows a lot of:
>  21141 ioctl(4, USBDEVFS_CONTROL, 0xbffffa70) = -1 EPROTO (Protocol
>  error)
> 
> it does produce kernel errors:
>  usbfs: USBDEVFS_CONTROL failed cmd testtool dev 5 rqt 64 rq 12 len 1
>  ret -71
>  usbfs: USBDEVFS_CONTROL failed cmd testtool dev 5 rqt 192 rq 12 len 1
>  ret -71
> 
> result of a 'SANE_DEBUG_SANEI_USB=255 scanimage -h' :
>  [sanei_usb] sanei_usb_open: trying to open device `libusb:002:005'
>  USB error: could not set config 1: Protocol error
>  [sanei_usb] sanei_usb_open: libusb complained: could not set config 1:
>   Protocol error
>  scanimage: open of device niash:libusb:002:005 failed: Device busy
> 
> Any advice ?
> 
> TIA
Did you check your hotplug configuration
also check sane cvs version tool/hotplug/README
check man sane-linux
check man sane-usb

-- 
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m.vr.gr.
Gerard Klaver