In the process of writing an app for my G1 I think I got stuck with
similar problem. Running Orienteer application (from the Market)
confirms that; turning my G1 by 360 degrees while holding it flat, the
reading on the Orienteer compass goes between 0 and 90 degrees only.
The same thing happens when using compass view with the maps/street
view, here I could only get about 90 degrees view angle as well (in
other words I cannot see other side of the street and other direction
of the street).

The funny thing is that, in my G1 app I was listening and logging
SensorManager.SENSOR_ORIENTATION_RAW values and earlier today the
returned values had the range of 360 degrees, and I have the log file
to prove it was not a dream :) When I run the same app now, it shows
limited range values only, consistent with Orienteer . As if something
got broken between now and few hours ago. I also recall that when I
tried compass/map/streetview few days ago, I was able to rotate my
view without any constraints.

There is not much metal around, I tried changing my location as well.
For a second, I though it could be the car, which my wife parked
outside the house an hour ago, but Orienteer shows the same problem
even 120 ft away in the backyard. I did not drop G1 or did anything of
that sort.



On Nov 4, 4:01 am, bryan <[EMAIL PROTECTED]> wrote:
> I've been trying to figure out the cause of acompassrelated error
> for a while. After debugging and standing out in the rain slowly
> spinning in circles for a while, I finally found out that my device is
> reporting back yaw values inconsistently.
>
> For example, the range of offset from magnetic north is +/- 46
> degrees. The average offset is just under 20 degrees. Depending on how
> I orient my G1, the error can go to 46 degrees off of magnetic north.
> Has anyone here experienced similar results when reading yaw from the
> sensor? I've gotten a number of reports from others complaining about
> inaccuracy withcompasstype results and am wondering if this is a per
> phone error or if all of the G1s have poor yaw/orientation sensors.
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