[Voyage-linux] Re: QB9

[jegunn]

Hi, Punky.

Just to summarize from here:

UAC1 mode does not work at all; tried Voyage snapshot April 26, 0.7.0,
Fedora 12,13, Ubuntu 10.04 (several platforms). Always dmesg message
about not being able to read frequency, 96 on display, Dac does not
work at all.

UAC2 mode only works with late Alsa and late-ish kernels. It works
with voyage 0.7.0 (Alsa 1.0.24, kernel 2.6.33.7-rt29-voyage (SMP)
on both an AMD Turion mini-itx system (880G chipset) and a VIA
C7 mini-itx system, but is finicky about what gets connected first.
Punky remarked in some post that the problems might be associated
with the fact that the Alsa version is not quite pure 1.0.24.

It works, seemingly flawlessly, on the same two systems with the April 
snapshot of Voyage, Alsa 1.0.24 and kernel 2.6.38-voyage. I just noticed 
that this is not a realtime kernel (?). Probably does not matter so much 
for asynchronous USB IF the buffer in the receiver is big enough.

--jim

On Wed, 11 May 2011, Frank Lübeck wrote:

> On Wed, May 11, 2011 at 10:36:51AM +0800, Kim-man 'Punky' TSE wrote:
>> Hi all,
>>
>> Just want to know the status of QB-9 issues.  Does anyone in the list still having problem with QB-9?
>>
>> We kind of believe that UAC1 mode in QB-9 could be problematic.  Could you confirm what setup that works?
>>
>> 1. UAC1 or UAC2 mode
>> 2. Voyage MPD version (0.7.0 or daily).  If daily, please list the
>> kernel version, and alsa version (run command "uname -a ; dpkg-query
>> --show | grep alsa").
>>
>> Thanks and regards,
>> Punky
>
> Hi Punky and others,
>
> No news from me. No combination works for me. To recall:
>
> UAC1: always locked displaying "96". Tried with several computers,
>      variants of Linux, versions of ALSA.
>
> UAC2: with most of the machines mentioned above: QB-9 is not recognized as
>      a device at all. Exception: voyage with 2.6.38.5 kernel (either with
>      contained ALSA 1.0.23, also tried with ALSA 1.0.24), in this case the
>      QB-9 is recognized, BUT as a UAC1 device and again it is locked at "96".
>
> UAC1 works for me with Windows XP with builtin USB audio driver and I'm
> using it for the moment with ALIX + OpenBSD 4.8 (its uaudio.c driver needs
> a small patch to work).
>
> Best regards,
>   Frank
>>
>> On 5/6/2011 4:04 PM, Frank Lübeck wrote:
>>>
>>> But 2.6.38.5 with the included ALSA 1.0.23 is the combination that Maarten
>>> reported to work for him in UAC2 mode. This is what I wanted to reproduce.
>>>
>>> I had tried the voyage-mpd-current before with 2.6.38.4 plus 1.0.24 alsa.
>>> In that case the QB-9 in class 2 mode wasn't recognized at all.
>>>
>>> Best regards, Frank
>>>
>>>
>>> _______________________________________________
>>> Voyage-linux mailing list
>>> Voyage-linux at list.voyage.hk
>>> http://list.voyage.hk/mailman/listinfo/voyage-linux
>>
>>
>> --
>> Regards,
>> Kim-man "Punky" Tse
>>
>> * Open Source Embedded Solutions and Systems
>>   - Voyage Linux (http://linux.voyage.hk)
>>   - Voyage ONE   (http://linux.voyage.hk/voyage-one)
>>   - Voyage MPD   (http://linux.voyage.hk/voyage-mpd)
>> * Voyage Store   (http://store.voyage.hk)
>>
>