maemo.org Bugzilla – Bug 8577
Scanning for IAPs interrupts A2DP playback
Last modified: 2010-02-03 18:08:04 UTC
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EXACT STEPS LEADING TO PROBLEM:
1. Launch media player, play back a (local) MP3 file
2. Connect your A2DP headset via Bluetooth (Sennheiser MM450)
3. Hit the connection chooser, wait
No choppy sound
Every time the connection chooser scans for connections the sound is
interrupted for roughly 100-200ms. Background scanning also explains some
regular interruptions in the A2DP audio, even when the connection chooser is
If you want to reproduce it very fast, just use:
$ dbus-send --system --dest=com.nokia.wlancond --type=method_call --print-reply
/com/nokia/wlancond/request com.nokia.wlancond.request.scan int32:4
EXTRA SOFTWARE INSTALLED:
Nothing running at that time
Does not happen with local playback on the speakers, so it definitely has to do
something with Bluetooth. This bug would be less annoying if #3399 was fixed
and there was no need for third party applications to scan the WiFi.
Thanks for reporting this. Bluetooth and WLAN share the same antenna (see bug
3238) so some interference is unavoidable and this may be WONTFIX as well.
Interesting. Passively (or even actively) scanning all Wifi channels might
really be blocking the antenna too long. Is there maybe a way to reduce
scanning speed? Or on the other hand (have to warn you: I have no insight on
how A2DP works), is there the possibility to increase buffer-sizes for A2DP?
As Lucas already correctly wrote, this is a WONTFIX.