Yeah, I'm not convinced are issues are the same, though they seem
related. From reading your posts your crackling was happening on a
timed interval, where as mine is more of a random static.
I have a laptop as well, but it is going on 5 years old, and this
problem is new since kernels .33+. I don't think I have this new USB
bus/hub that you are talking about.
That said, doing 2.6.39 with rtirq and nokms is the only way to solve it
in my case. That or use a really old release of a distro, which gives
me other issues non audio related.
-BB
On 5/25/11 5:03 AM, Aurélien Leblond wrote:
> Ouch...
>
> Unfortunately I have a laptop, so or I get to work... or I change it
> altogether (and I just bought it two months ago...especially to play
> music!).
>
> What gives me hope though is that:
> - I have en XHCI USB3 port on the same laptop... Module snd-usb-audio
> doesn't work on it yet, but I don't despair.
> - Most important is that yesterday, I compiled the 2.6.39 kernel with
> irqthreads, setup the rtirq script, removed every module I wasn't
> using to free the irqs (xhci for the moment, wifi, other sound cards,
> etc...) and I was down to only 2/3 crackles (and 3 messages in dmesg)
> when playing a song with Ardour3 and Hydrogen playing along.
>
> I still have to test and turn off KMS as I have read another user who
> reported the same crackles (but no error in dmesg, because he has to
> have alsa compiled with debug option to get them) and improved a lot
> the thing with this option off...
>
> Strange that the HP Envy 17, which is apparently designed with music
> production in mind isn't set up properly hardware wise to support USB
> sound cards!
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Received on Wed May 25 20:15:02 2011
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