27 Mar
2007
27 Mar
'07
6:36 p.m.
To semi-answer my own question, I was able to make progress by doing a
modprobe -r ehci-hcd
I now get 4 channels in while using the ohci_hcd driver. It seems like it's
a bug using USB 1.1 devices with the ehci-hcd in 2.6.16.
Jim Steed
On 3/26/07, Jim Steed <jsteed(a)gedae.com> wrote:
One more note. I didn't install real time kernel patches to my 2.6.16
kernel. Would not using the real time patches affect the bandwidth
problem from this "cannot submit datapipe" error?
I am able to arecord channels 1 & 2 or channels 3 & 4 but any command
to get all 4 causes this weird error. Should I just give up on the
Quattro?
Thanks,
Jim
On 3/24/07, Jim Steed <jsteed(a)gedae.com> wrote:
More info from my arecord with MAudio Quattro
problem...
Checking dmesg I get an error that says
cannot submit datapipe for urb 0, err = -28
I found through google that this means the USB bandwidth has been
exceeded. I checked and CONFIG_USB_BANDWIDTH is not set in my kernel
configuration. I tried rebuilding with it explicitly set to no and I
still get the -28 error.
Anyone have any recommendations for getting around this?
Thanks,
Jim
On 3/23/07, Jim Steed <jsteed(a)gedae.com> wrote:
> I'm trying to use all 4 input channels on a MAudio Quattro on Fedora
> Core 5 running on a Playstation 3 (PPC build of the kernel with some
> stuff stripped out).
>
> The final app will just use open() and read() to process the data
> directly. In that application it looks like I get 2 copies of the
> first 2 channels. I get Channel 0 replicated in Channel 2 with
> exactly the same values, and Channel 1 replicated in Channel 3.
> (Recording 16 bit at 44.1kHz)
>
> I followed the directions in
> http://wiki.linuxquestions.org/wiki/M-Audio_Quattro to setup
> .asoundrc. I am trying to debug using just arecord but I can't get it
> to do anything
>
> arecord -r 44100 -c 4 -f s16_le -D q4 -d 5 test4.wav
>
> gives me
>
> arecord: xrun:1082: read/write error, state = PREPARED
>
> Any help would be appreciated.
>
> Thanks,
> Jim Steed
>
> Here is the relevant part of /proc/bus/usb/devices:
>
> T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=02 Dev#= 4 Spd=12 MxCh= 0
> D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
> P: Vendor=0763 ProdID=2001 Rev= 1.05
> S: Manufacturer=M Audio
> S: Product=USB Audio Quattro
> C:* #Ifs=10 Cfg#= 1 Atr=40 MxPwr= 0mA
> I: If#= 0 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00
Driver=snd-usb-audio
> I: If#= 1 Alt= 0 #EPs= 0 Cls=01(audio)
Sub=02 Prot=00
Driver=snd-usb-audio
> I: If#= 1 Alt= 4 #EPs= 1 Cls=01(audio)
Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=03(O) Atr=09(Isoc) MxPS= 192 Ivl=1ms
> I: If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00
Driver=snd-usb-audio
> I: If#= 2 Alt= 4 #EPs= 1 Cls=01(audio)
Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=85(I) Atr=0d(Isoc) MxPS= 192 Ivl=1ms
> I: If#= 3 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00
Driver=snd-usb-audio
> I: If#= 4 Alt= 0 #EPs= 0 Cls=01(audio)
Sub=02 Prot=00
Driver=snd-usb-audio
> I: If#= 4 Alt= 1 #EPs= 1 Cls=01(audio)
Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=03(O) Atr=09(Isoc) MxPS= 576 Ivl=1ms
> I: If#= 4 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=03(O) Atr=09(Isoc) MxPS= 288 Ivl=1ms
> I: If#= 4 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=03(O) Atr=09(Isoc) MxPS= 192 Ivl=1ms
> I: If#= 5 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00
Driver=snd-usb-audio
> I: If#= 5 Alt= 1 #EPs= 1 Cls=01(audio)
Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=85(I) Atr=0d(Isoc) MxPS= 576 Ivl=1ms
> I: If#= 5 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=85(I) Atr=0d(Isoc) MxPS= 288 Ivl=1ms
> I: If#= 5 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=85(I) Atr=0d(Isoc) MxPS= 192 Ivl=1ms
> I: If#= 6 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00
Driver=snd-usb-audio
> I: If#= 7 Alt= 0 #EPs= 0 Cls=01(audio)
Sub=02 Prot=00
Driver=snd-usb-audio
> I: If#= 7 Alt= 1 #EPs= 1 Cls=01(audio)
Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=04(O) Atr=09(Isoc) MxPS= 576 Ivl=1ms
> I: If#= 7 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=04(O) Atr=09(Isoc) MxPS= 288 Ivl=1ms
> I: If#= 7 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=04(O) Atr=09(Isoc) MxPS= 192 Ivl=1ms
> I: If#= 8 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00
Driver=snd-usb-audio
> I: If#= 8 Alt= 1 #EPs= 1 Cls=01(audio)
Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=86(I) Atr=0d(Isoc) MxPS= 576 Ivl=1ms
> I: If#= 8 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=86(I) Atr=0d(Isoc) MxPS= 288 Ivl=1ms
> I: If#= 8 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00
Driver=snd-usb-audio
> E: Ad=86(I) Atr=0d(Isoc) MxPS= 192 Ivl=1ms
> I: If#= 9 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00
Driver=snd-usb-audio
E:
Ad=81(I) Atr=03(Int.) MxPS= 32 Ivl=1ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 32 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 32 Ivl=0ms