My motherboard have an integrated ALC883 sound chip.

And everything works fine outside Skype, playback and recording.

When I set Skype playback to work with pulseaudio it works for some seconds then the entire sound system seems to crash, no more sounds, even outside Skype.

My motherboard is an ASUS P5VD2-X;
And Ubuntu lucid have automatically set VIA Technologies, Inc. VT1708/A [Azalia HDAC] (VIA High Definition Audio Controller) (rev 10) as the driver for my motherboard ALC883 integrated sound chip.

Thank you, once more, for the promptly reply. 

syslog:

Jul  3 10:52:00  dbus-daemon: Reloaded configuration
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c: O snd_pcm_delay() retornou um valor que é excepcionalmente grande: 1480680480 bytes (8393880 ms).
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c: É mais provável que isso seja um erro no driver "snd_hda_intel" do ALSA. Por favor, relate esse problema aos desenvolvedores do ALSA.
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c: snd_pcm_dump():
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c: Soft volume PCM
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c: Control: PCM Playback Volume
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c: min_dB: -51
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c: max_dB: 0
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c: resolution: 256
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c: Its setup is:
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   stream       : CAPTURE
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   access       : MMAP_INTERLEAVED
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   format       : S16_LE
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   subformat    : STD
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   channels     : 2
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   rate         : 44100
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   exact rate   : 44100 (44100/1)
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   msbits       : 16
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   buffer_size  : 88192
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   period_size  : 44096
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   period_time  : 999909
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   tstamp_mode  : ENABLE
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   period_step  : 1
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   avail_min    : 44096
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   period_event : 0
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   start_threshold  : -1
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   stop_threshold   : 1444937728
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   silence_threshold: 0
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   silence_size : 0
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   boundary     : 1444937728
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c: Slave: Hardware PCM card 0 'HDA VIA VT82xx' device 0 subdevice 0
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c: Its setup is:
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   stream       : CAPTURE
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   access       : MMAP_INTERLEAVED
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   format       : S16_LE
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   subformat    : STD
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   channels     : 2
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   rate         : 44100
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   exact rate   : 44100 (44100/1)
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   msbits       : 16
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   buffer_size  : 88192
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   period_size  : 44096
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   period_time  : 999909
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   tstamp_mode  : ENABLE
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   period_step  : 1
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   avail_min    : 44096
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   period_event : 0
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   start_threshold  : -1
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   stop_threshold   : 1444937728
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   silence_threshold: 0
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   silence_size : 0
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   boundary     : 1444937728
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   appl_ptr     : 1212992
Jul  3 10:53:09  pulseaudio[1835]: alsa-util.c:   hw_ptr       : 187208
Jul  3 10:53:10  rtkit-daemon[1838]: Sucessfully made thread 2244 of process 2244 (n/a) owned by '1000' high priority at nice level -11.
Jul  3 10:53:10  rtkit-daemon[1838]: Supervising 1 threads of 1 processes of 1 users.
Jul  3 10:53:10  pulseaudio[2244]: pid.c: Stale PID file, overwriting.
Jul  3 10:53:10  rtkit-daemon[1838]: Sucessfully made thread 2245 of process 2244 (n/a) owned by '1000' RT at priority 5.
Jul  3 10:53:10  rtkit-daemon[1838]: Supervising 2 threads of 1 processes of 1 users.
Jul  3 10:53:10  rtkit-daemon[1838]: Sucessfully made thread 2246 of process 2244 (n/a) owned by '1000' RT at priority 5.
Jul  3 10:53:10  rtkit-daemon[1838]: Supervising 3 threads of 1 processes of 1 users.