[sane-devel] Benq 5000 (Freebsd) works form time to time

[m. allan noah]

It might be interesting to boot a linux livecd, and try the scanner
there, just to see if it is an OS issue or a hardware issue.

allan

On Thu, Jun 2, 2011 at 7:00 PM, Олег <xammep at mail.ru> wrote:
> Hi all!
>
> I use:
> Benq 5000
> sane-backends-1.0.21
> FreeBSD 7.4-STABLE
> 'firmware /home/user/ftp/20F8V119.bin' in snapscan.conf
>
> The problem is scanner works unstable (from time to time). It takes multiple
> attepts of 'scanimage > file.ppm' to get the scan.
> All my actions have been tested in 2 cases:
> 1. with libusb (kernel without 'device uscanner')
> 2. with uscanner:
> (echo 'product ACERP ACERSCAN_5000 0x20f8 Benq 5000' >>
> /usr/src/sys/dev/usb/usbdevs
> echo '{{ USB_VENDOR_ACERP, USB_PRODUCT_ACERP_ACERSCAN_5000 }, 0 },' >>
> /usr/src/sys/dev/usb/uscanner.c
> recompiled kernel with 'device uscanner')
>
> Case1:
> Benq 5000 powered on first time:
>
> # lsusb
> Bus /dev/usb2 Device /dev/ugen0: ID 04a5:20f8 Acer Peripherals Inc. (now
> BenQ Corp.) Benq 5000
>
> sane-find-scanner found the scanner on the fourth attempt:
>
> # sane-find-scanner -q
> # sane-find-scanner -q
> # sane-find-scanner -q
> # sane-find-scanner -q
> found USB scanner (vendor=0x04a5 [Color], product=0x20f8 [ FlatbedScanner
> 22]) at libusb:/dev/usb2:/dev/ugen0
>
> and scanimage found it on third attempt:
>
> # scanimage -L
>
> No scanners were identified. ....
> .
> .
> .
> # scanimage -L
> device `snapscan:libusb:/dev/usb2:/dev/ugen0' is a Acer FlatbedScanner42
> flatbed scanner
>
> after 6 attempts of:
> # scanimage --quality-cal=no > image-7.ppm
> scanimage: no SANE devices found
>
> we got the scan:
> # scanimage --quality-cal=no > image-7.ppm
> #
>
> and next:
> # scanimage -L
>
> No scanners were identified.....
>
> And i have to wait several minutes getting this errors to get the next scan.
>
> Case2:
> Benq 5000 powered on first time it is found by sane-find-scanner and
> scanimage successfully:
>
> # sane-find-scanner -q
> found USB scanner (vendor=0x04a5, product=0x20f8) at /dev/uscanner0
>
> # scanimage -L
> device `snapscan:/dev/uscanner0' is a Acer FlatbedScanner22 flatbed scanner
>
> # scanimage --quality-cal=no > image-1.ppm
> [snapscan] Scanner warming up - waiting 31 seconds.
> #
>
> OK. We got the scan.
> After 3 minutes:
>
> # scanimage --quality-cal=no > image-2.ppm
>
> hangs forever...
>
> If i kill scanimage and use sane-find-scanner:
> # sane-find-scanner -q
> # sane-find-scanner -q
> .
> .
> .
> i have nothing.
>
> I've tried changing firmware to 20F8V116.bin, 20F8V114.bin, 20F8V112.bin -
> the problem repeats.
> What is the root of this instability?
> Thanks for your time!
>
>
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