[LAU] hdsp not happy with recent kernels

[Fernando Lopez-Lezcano]

On 09/15/2012 08:04 AM, peter at peterlutek.com wrote:
>> i've just switched over to jack1... it fails as well, with a different
>> error message (don't know if this sheds any more light on the situation!):
>>
>> plutek at palnote:~$ jackd 0.122.0
>> Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn
>> and others.
>> jackd comes with ABSOLUTELY NO WARRANTY
>> This is free software, and you are welcome to redistribute it
>> under certain conditions; see the file COPYING for details
>>
>> JACK compiled with System V SHM support.
>> loading driver ..
>> apparent rate = 44100
>> creating alsa driver ...
>> hw:0,0|hw:0,0|256|2|44100|0|0|nomon|swmeter|-|32bit
>> control device hw:0
>> configuring for 44100Hz, period = 256 frames (5.8 ms), buffer = 2 periods
>> ALSA: final selected sample format for capture: 32bit integer
>> little-endian
>> ALSA: use 2 periods for capture
>> ALSA: final selected sample format for playback: 32bit integer
>> little-endian
>> ALSA: use 2 periods for playback
>> ALSA: prepare error for playback on "hw:0,0" (Input/output error)
>> DRIVER NT: could not run driver cycle
>>
>> **** alsa_pcm: xrun of at least 0.013 msecs
>>
>> thanks again for any help on this!
>
> ooops... getting rid of the extra -p flag, and going with -p1024, i get this:
>
> plutek at palnote:~$ jackd -dalsa -r44100 -p1024 -n2 -D -Chw:0,0 -Phw:0,0&
> [1] 3580
> plutek at palnote:~$ jackd 0.122.0
> Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn
> and others.
> jackd comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to redistribute it
> under certain conditions; see the file COPYING for details
>
> JACK compiled with System V SHM support.
> loading driver ..
> apparent rate = 44100
> creating alsa driver ... hw:0,0|hw:0,0|1024|2|44100|0|0|nomon|swmeter|-|32bit
> control device hw:0
> configuring for 44100Hz, period = 1024 frames (23.2 ms), buffer = 2 periods
> ALSA: final selected sample format for capture: 32bit integer little-endian
> ALSA: use 2 periods for capture
> ALSA: final selected sample format for playback: 32bit integer little-endian
> ALSA: use 2 periods for playback
> jackd watchdog: timeout - killing jackd

All errors seem to point to a problem with interrupts. Somehow the 
kernel is not handling interrupts from the soundcard, or the soundcard 
is not generating them. Jack's driver waits for them and they never 
arrive and as a result eventually the watchdog kills the whole thing in 
the case of jack1.

Anything in /var/log/messages?

On 09/13/2012 11:24 AM, Peter Lutek wrote:
>i suppose it's possible there's some weird interaction between the more 
recent kernels and my ThinkPad T520.

That would seem to be the case, something must have changed in the newer 
kernel versions. I'm successfully running a pci express card and 
multiface II under 3.2.18-1.rt29.1.fc14.ccrma.i686.rtPAE in a Lenovo 
T510 (older than yours).

-- Fernando