[sane-devel] Avision HP Scanjet 8390 Sleep Problem

[m. allan noah]

A couple Fujitsu machines have a similar problem. They shutdown USB
endpoint 0 when in power saving mode. This is in violation of the USB
specification, but does not harm their windows driver because it only
sends control packets when the computer first starts. Sane chokes,
because we send control packets at each program invocation. These
particular scanners come out of sleep mode when paper is inserted or a
button is pressed. Doing that before starting a sane frontend is a
workaround.

Do you see anything in your system logs when this occurs? Does the
device still show up in lsusb?

allan

On Fri, Nov 11, 2011 at 9:56 PM, Alejandro Imass <ait at p2ee.org> wrote:
> On Fri, Nov 11, 2011 at 9:15 PM, pizzakiller <pizzakiller at gmail.com> wrote:
>>
>>
>>
>> you did found solution for this issue?
>> --
>
> Nope. I haven't had the chance to test with these scanners again.
>
> --
> Alejandro Imass
>
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