[sane-devel] scanimage -T hangs forever

[Gerhard Jaeger]

Am Dienstag, 20. November 2007 14:01:05 schrieb m. allan noah:
> On 11/20/07, Johannes Meixner <jsmeix at suse.de> wrote:
> >
> > Hello,
> >
> > On Nov 19 15:38 m. allan noah wrote (shortened):
> > > why are you trying to use the -T?
> >
> > I thought "scanimage -d... -T" is the right way to do a test?
> >
> > I use it in the YaST scanner config tool to provide a [Test] option
> > for the user to test if his scanner/backend combination works.
> >
> > Should I better use "scanimage -d... >/dev/null" for a test?
> 
> the -T test just tries using a variety of buffer sizes during the data
> transfer, followed by a cancel (instead of completing the scan) IIRC.
> This might put some scanners/backends into a funk, as they dont
> properly implement the cancel.
> 
> i would not assume that every scanner/backend combination will act
> properly with -T.
> 

But in fact they should! A real working cancel is essential for
a good working frontend - IMHO!
Otherwise you always have to wait until a scan has finished even
if you see that it's crap - not really user-friendly.

-
Gerhard