[sane-devel] Firmware upload in acer-benq s2w 3300U

[Juan Jesus Gonzalez]

I use linux mandrake 9.0 , downloaded an compiled sane-backends
 1.0.9 with the latest scanimage souce. If I use the scanner in=20
windows and then switch to linux, it works fine; but no chance if I
 do it directly after powering down the scanner. The debug output
is:
[sanei_debug] Setting debug level of snapscan to 2.
[snapscan] usb_write Only 0 bytes written
[snapscan] mini_inquiry: snapscan_cmd command failed: Error during device=
 I/O
[snapscan] snapscani_check_device: mini_inquiry failed with Error during=20
device I/O.
[snapscan] usb_read Only 0 bytes read
and this is my proc/bus/usb/devices:
T:  Bus=3D01 Lev=3D00 Prnt=3D00 Port=3D00 Cnt=3D00 Dev#=3D  1 Spd=3D12  M=
xCh=3D 2
B:  Alloc=3D 17/900 us ( 2%), #Int=3D  1, #Iso=3D  0
D:  Ver=3D 1.00 Cls=3D09(hub  ) Sub=3D00 Prot=3D00 MxPS=3D 8 #Cfgs=3D  1
P:  Vendor=3D0000 ProdID=3D0000 Rev=3D 0.00
S:  Product=3DUSB UHCI Root Hub
S:  SerialNumber=3De400
C:* #Ifs=3D 1 Cfg#=3D 1 Atr=3D40 MxPwr=3D  0mA
I:  If#=3D 0 Alt=3D 0 #EPs=3D 1 Cls=3D09(hub  ) Sub=3D00 Prot=3D00 Driver=
=3Dhub
E:  Ad=3D81(I) Atr=3D03(Int.) MxPS=3D   8 Ivl=3D255ms
T:  Bus=3D01 Lev=3D01 Prnt=3D01 Port=3D01 Cnt=3D01 Dev#=3D  6 Spd=3D12  M=
xCh=3D 0
D:  Ver=3D 1.00 Cls=3Dff(vend.) Sub=3Dff Prot=3Dff MxPS=3D 8 #Cfgs=3D  1
P:  Vendor=3D04a5 ProdID=3D20b0 Rev=3D 1.20
S:  Manufacturer=3DColor
S:  Product=3D FlatbedScanner 22
C:* #Ifs=3D 1 Cfg#=3D 1 Atr=3D40 MxPwr=3D100mA
I:  If#=3D 0 Alt=3D 0 #EPs=3D 3 Cls=3Dff(vend.) Sub=3Dff Prot=3Dff Driver=
=3Dusbscanner
E:  Ad=3D81(I) Atr=3D02(Bulk) MxPS=3D  64 Ivl=3D0ms
E:  Ad=3D02(O) Atr=3D02(Bulk) MxPS=3D   8 Ivl=3D0ms
E:  Ad=3D83(I) Atr=3D03(Int.) MxPS=3D   8 Ivl=3D16ms
Also I have a soft link /dev/scanner0 < /dev/usbscanner.
Thank you in advance for any reply and sorry for my bad english.