[sane-devel] HP ScanJet 6300C head moving back/forth during scan >200dpi

[m. allan noah]

no, i meant the scanner is usb 1.1. have you tried using the usb under windows?

allan

2008/4/14 Michael Ole Olsen <gnu at gmx.net>:
> Hello again
>
>  It's a USB-2.0 machine (the hub is integrated on the motherboard,
>  ASUS A7N8X deluxe), and I have had no other issues with the usb hub
>  running fullspeed; I get fine transfer speed to my camera with gphoto2
>  and to my usb-sticks.
>
>  No problems under Windows and also no problems when using the scanner with
>  scsi or scanner-server (rj45), so the scanner isn't wrecked.
>
>  I cannot use the SCSI feature on this computer though - and I don't have
>  the scanner server here, that's why I want to use it with USB.
>
>
>
>  /michael ole olsen
>
>
>
>
>  On Mon, 14 Apr 2008, m. allan noah wrote:
>
>  > On Mon, Apr 14, 2008 at 10:34 AM, Michael Ole Olsen <gnu at gmx.net> wrote:
>  > > Hello, I am having problem using my HP ScanJet 6300C with libusb and
>  > >  xsane+sane backend from debian testing. I have also tried debian etch
>  > >  version on another computer with same issues, and I even tried
>  > >  downgrading my sane backend (then it went completely insane and almost
>  > >  broke the scanner). Right now im testing on a cometely fresh install of
>  > >  Debian/testing.
>  > >
>  > >  There are no scanner modules loaded/in kernel and the kernel is PREEMPT 2.6.23.9
>  > >
>  > >  When I do a scan, it waits about 6-8 seconds before scanning (just like
>  > >  it is calibrating), then it moves the scanner head back and forth while
>  > >  scanning (only when i get over approx. 200dpi)
>  > >
>  > >  I did read somewhere on this mailinglist, that it had to do with USB
>  > >  bandwidth, so the scanner must wait at above 200dpi for the transfer of
>  > >  data to complete over USB.
>  > >
>  > >  I'm using it with a high-speed USB 2.0 hub, so i dont see how there
>  > >  could be any kind of transfer-bottleneck.
>  >
>  > it's a usb 1.0 machine? does it do this on windows?
>  >
>  > allan
>  > --
>  > "The truth is an offense, but not a sin"
>
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-- 
"The truth is an offense, but not a sin"