Echo issue on OM2008.08 solved
openmoko at mazikeen.demon.co.uk
Mon Oct 6 21:39:36 CEST 2008
On Monday 06 October 2008, Daniel Nöthen wrote:
> I've found out that the echo suppression works only one time after qpe was
> started. At least this applies to me.
> Phone: freerunner (gta02)
> Dist: OM2008.09
> gmshandset.state: http://www.teaparty.net/technotes/data/gsmhandset.state
> "grep AT%N0187 libficgta01vendor.so" gives me a match.
> So I assume that Florians patch got into OM2008.9
> Here is a step by step list of how it behaves to me:
> 1. Boot the freerunner
> 2. Make a call -> no echo
> 3. Hang up
> 4. Make a call -> echo
> 5. Hang up
> 6. /etc/init.d/xserver-nodm restart
> 7. Make a call -> no echo
> 8. Hang up
> 9. Make a call -> echo
> With the above state file I was able to bring up the "Speaker" volume up to
> without hearing any echo on step 2 and 7.
> The volumes on both sides were very good.
> On step 4 and 9 I could only bring up the "Speaker" volume to 79%.
> Above 79% the echo came back.
> So it seems that the echo suppression command (AT%N0187) gets reset after
> every call.
> Can anyone confirm this?
When I tested this under FSO I checked that it was persistent over multiple
calls. It remained until I explicitly disabled it with AT%N0001 mid call
several calls later to check the effect back to back. I may retest this in
case I missed something.
Are there any resets of any sort in there that could undo the setting? Unless
there's a delay involved I can't see any harm in sending AT%N0187 at the
start of every call.
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