[sane-devel] Epson Perfection 1650 vs RedHat 7.2: not seen?

[Karl Heinz Kremer]

The scanner should show up in 'cat /proc/bus/usb/devices' even 
when no scanner driver is loaded. I suspect that something is
wrong with your cable. You write that you tried both ports, 
can you also try a different cable? 

Before you can run any Sane frontend, you need to see the 
scanner in the devices list. 

Depending on how recent your kernel is, you may not have to
provide the vendor and product ids as paramaters to modprobe.
Once the scanner shows up, try to load the scanner module
without any parameters. If the entry in devices lists the
scanner driver, you are all set, if it does not list the
driver, then add the IDs.

Karl Heinz


On Thu, Jan 24, 2002 at 06:17:50PM -0500, Pierre Sarrazin wrote:
> I have just connected my new Epson Perfection 1650 scanner to my
> RedHat 7.2 system (linux 2.4.7), but it does not seem like the
> scanner is detected.
> 
> I have added these lines to /etc/modules.conf:
> 
>     alias usb-controller usb-uhci
> 
> The "usbcore" and "usb-uhci" modules are loaded according to lsmod.
> When I give the command "cat /proc/bus/usb/devices" (under root),
> I only get this:
> 
> 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 Root Hub
> S:  SerialNumber=d000
> 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
> 
> 
> I picked up somewhere that the vendor ID for Epson is 0x04b8 and
> that the product ID for the 1650 is 0x0110.  So I tried the command
> "modprobe scanner vendor=0x04b8 product=0x0110", and the line
> 
>     kernel: scanner.c: USB Scanner support registered.
> 
> appears in /var/log/messages, but /proc/bus/usb/devices still only
> displays the above paragraph.  My understanding is that I should
> be seeing another paragraph with the line "Product=EPSON Scanner".
> 
> Trying "modprobe scanner" without parameters gives the same result.
> 
> I am using the stock RedHat kernel and modules.  I have not
> recompiled any of parts of those.
> 
> I have two USB connectors at the back of my machine.  I tried
> both, without success (I removed the scanner module with rmmod,
> then connected the scanner to the other USB port, then gave the
> modprobe command again).  When I disconnected the scanner from a
> USB port, the scanner made a high pitched "dzoot! dzoot!" sound,
> which sounds normal, I guess...
> 
> The command "scanimage" from scan-backends 1.0.5 says "no SANE
> devices found".  The only uncommented line in /etc/sane.d/epson.conf
> is "usb /dev/usb/scanner0".  Moreover:
> 
> # ls -l /dev/usb/scanner0 /dev/*scanner*
> /bin/ls: /dev/*scanner*: No such file or directory
> crw-------    1 ps       root     180,  48 Aug 30 16:30 /dev/usb/scanner0
> 
> I tried "scanimage -d epson:/dev/usb/scanner0" (under root) and
> got this:
> 
> scanimage: open of device epson:/dev/usb/scanner0 failed: Invalid argument
> 
> Smarter users have succeeded with the 1650, so I suppose I'm not
> very far from the goal.  Thanks for any help...
> 
> -- 
> Pierre Sarrazin <sarrazip at sympatico dot ca>
> _______________________________________________
> Sane-devel mailing list
> Sane-devel at www.mostang.com
> http://www.mostang.com/mailman/listinfo/sane-devel

-- 
Karl Heinz Kremer                                  khk at khk.net
PGP Key at                 http://www.khk.net/download/khk.asc
EPSON Sane Backend:                         http://www.khk.net
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