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

[m. allan noah]

advice? yeah. stop using a bleeding edge mm kernel unless you are prepared 
to hack the kernel to get everything to work. it is highly likely that 
there have been some changes that affect the usb subsystem.

allan

On Tue, 20 Apr 2004, gerard klaver wrote:

> 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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