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SubjectRe: [PATCH] usb audio.
On Fri, Oct 13, 2000 at 03:08:59PM +0100, David Woodhouse wrote:
> J.A.K.Mouw@ITS.TUDelft.NL said:
> > Only problem is that the sound has a lot of hickups and I get these
> > messages in my syslog:
>
> I didn't see that. I think I _do_ have CONFIG_USB_BANDWIDTH enabled. What
> else do you have connected and what else were you using at the time? Does
> the kernel whinge?

Just recompiled the USB modules with CONFIG_USB_BANDWIDTH enabled, but
that doesn't solve the problem. The audio thingy is the only device
connected, I don't have an USB hub, otherwise I would have used my
Wacom Graphire and the audio converter at the same time (my laptop has
only one USB port). FWIW, the audio converter is using a Philips UDA
1321 chip.

Here is some more information:

root@arthur:~ #lspci
00:00.0 Host bridge: Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge (AGP disabled) (rev 03)
00:02.0 VGA compatible controller: Neomagic Corporation NM2160 [MagicGraph 128XD] (rev 01)
00:07.0 ISA bridge: Intel Corporation 82371AB PIIX4 ISA (rev 02)
00:07.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 02)
00:0a.0 CardBus bridge: Texas Instruments PCI1131 (rev 01)
00:0a.1 CardBus bridge: Texas Instruments PCI1131 (rev 01)

root@arthur:~ #cat /proc/bus/usb/devices
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 0.00
S: Product=USB UHCI Root Hub
S: SerialNumber=fcc0
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 6 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0471 ProdID=0104 Rev= 1.00
S: Manufacturer=Philips Electronics
S: Product=Philips USB Digital Speaker System
C:* #Ifs= 3 Cfg#= 1 Atr=40 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=audio
I: If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=audio
I: If#= 1 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=audio
E: Ad=04(O) Atr=09(Isoc) MxPS= 56 Ivl= 1ms
I: If#= 1 Alt= 2 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=audio
E: Ad=04(O) Atr=09(Isoc) MxPS= 112 Ivl= 1ms
I: If#= 1 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=audio
E: Ad=04(O) Atr=09(Isoc) MxPS= 112 Ivl= 1ms
I: If#= 1 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=audio
E: Ad=04(O) Atr=09(Isoc) MxPS= 224 Ivl= 1ms
I: If#= 1 Alt= 5 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=audio
E: Ad=04(O) Atr=09(Isoc) MxPS= 168 Ivl= 1ms
I: If#= 1 Alt= 6 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=audio
E: Ad=04(O) Atr=09(Isoc) MxPS= 336 Ivl= 1ms
I: If#= 2 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=00 Prot=00 Driver=hid
E: Ad=83(I) Atr=03(Int.) MxPS= 1 Ivl= 10ms

Let me know if you want to have more information.


Erik


--
J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department
of Electrical Engineering, Faculty of Information Technology and Systems,
Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands
Phone: +31-15-2783635 Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl
WWW: http://www-ict.its.tudelft.nl/~erik/
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