Hi Geoff,

Perhaps you know what is going wrong with Ununtu jaunty Skype - recently I upgraded from ububtu 8.10 to 9.04 and although sound work well with all non-skype applications the Skype complains that it have problem with audio playback and capture device.

Strace shows the problem is :

ALSA lib pcm.c:2205:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi


And I saw in ubuntu forums that smbody just installed skype build with static oss bound,
but I woul dlike to stay with alsa model.




geoffrey mendelson wrote:

On Sep 3, 2009, at 11:44 PM, mbrace7for...@aim.com wrote:

Sound on Skype is very unpredictable. Sometimes it works well and sometimes it doesn't. I often get brake up (pauses) with speech. Or I find that the Skype Sound settings in Options have changed. Or before it worked now it won't.

I get the same problems (breakup) and other random problems under both MacOS and Windows on several different computers. I think it is a SKYPE problem, not a Linux one.

You can turn on a display of packet information and see how many dropped or out of sequence packets you get. You can improve it if you open a UDP port on your router for SKYPE. The port is a user setting so you can do it for more than one computer if you share a router.

BTW, SKYPE is very careful to keep the exact details of their protocol hidden, though some people have packet sniffed it. Because it is hidden, one of the things I can't do is to give it priority (QOS) over other things on my router. Therefore SKYPE is often a less than desirable way for me to communicate. I use SKYPE, and yes they do get some of my money, but most of my money goes to SIP providers who use an open protocol. YMMV.


Geoff.



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