Hi,
The colors are completly wrong it looks like a color channel is missing or
maybe switched.
Are you sure this is not a graphic card issue ? Could you try disabling
hardware acceleration:
guvcview --hwd_acel=0
This prevents the use of hardware overlays, it decreases performance but
could if the colors are OK it may signal a problem with you graphic card.

best regards,
Paulo

2009/7/21 Tommaso Gardumi <[email protected]>

> Sorry the strange values was an attempt to correct the default broken
> visualisation.
>
> I've set everithing back to default but what i get is always the same.
> I've noticed that when i try to switch to Auto exposure i get this
> error:
> VIDIOC_S_CTRL - Unable to set control: Errore di I/O
> Exposure, Auto Priority change to 1 failed
> VIDIOC_G_CTRL - Unable to get control: Errore di I/O
> hardware get failed
>
> And if i set to manual exposure and try to change the value nothing
> happens.
>  Even switching between MJPG and YUYV and changing resolution and fps to
> any possible combination leave me with this quality (.jpg attached)
>
>
> Il giorno mar, 21/07/2009 alle 17.05 +0200, Laurent Pinchart ha scritto:
> > On Tuesday 21 July 2009 17:02:37 Paulo Assis wrote:
> > > Also make sure to set an appropriate  value to exposure and white
> balance.
> > > hue also seems to be set at an invalid value!!!
> > >
> > > guvcview output:
> > > Hue, -4:1:4, default 0
> >
> > As this is consecutive to an Ubuntu upgrade, my guess is that libv4l2
> might
> > not set proper default values.
> >
> > Regards,
> >
> > Laurent Pinchart
> >
>
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