I comment the line "stopAudioPlayback();"  in file
SoundRecorder.java, so the Soundrecord and music playback work at the
same time.  however, the error comes as :

I/DEBUG   ( 1847): *** *** *** *** *** *** *** *** *** *** *** *** ***
*** *** ***
I/DEBUG   ( 1847): Build fingerprint: .../:1.5/CUPCAKE/eng.XXXX.
20090506.190953:eng/test-keys'
I/DEBUG   ( 1847): pid: 1850, tid: 1864  >>> /system/bin/mediaserver
<<<
I/DEBUG   ( 1847): signal 11 (SIGSEGV), fault addr 0000000c
I/DEBUG   ( 1847):  r0 00000000  r1 4030adec  r2 00000001  r3 00000300
I/DEBUG   ( 1847):  r4 00000000  r5 00000300  r6 00000001  r7 00000300
I/DEBUG   ( 1847):  r8 00000000  r9 00038438  10 00022c38  fp 00000001
I/DEBUG   ( 1847):  ip ab798e48  sp 4030adb8  lr afe13e8b  pc
afe13bec  cpsr 20000030
W/AudioFlinger( 1850): write blocked for 50 msecs
I/DEBUG   ( 1847):          #00  pc 00013bec  /system/lib/libc.so
I/DEBUG   ( 1847):          #01  pc 00013e86  /system/lib/libc.so
I/DEBUG   ( 1847):          #02  pc 0005aa6c  /system/lib/libaudio.so
I/DEBUG   ( 1847):          #03  pc 0004c360  /system/lib/libaudio.so
I/DEBUG   ( 1847):          #04  pc 0001e36c  /system/lib/libaudio.so
I/DEBUG   ( 1847):     4030ae08  40bf1080
I/DEBUG   ( 1847):     4030ae0c  ab75aa70  /system/lib/libaudio.so

and then

I/ServiceManager( 1845): service 'media.audio_flinger' died
I/ServiceManager( 1845): service 'media.player' died
I/ServiceManager( 1845): service 'media.camera' died
W/MediaPlayer( 1984): MediaPlayer server died!

and then, the audio service restart.
the audio flinger thread won't work for the mediarecord.

do you have the same problem
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