I have an application on an embedded device. It was all happily
working with a usb-storage device, a pl2303-based gps device and a
usb-audio device plugged into a usb2 hub. Now I've added a usb mouse
and when I open the associated /dev/event0, I start seeing the
messages below when I try to play audio to the usb-audio device.
cannot submit datapipe for urb 0, error -28: not enough bandwidth
output: ioctl(SNDCTL_DSP_SYNC): Broken pipe
cannot submit datapipe for urb 0, error -28: not enough bandwidth
cannot submit datapipe for urb 0, error -28: not enough bandwidth
output: ioctl(SNDCTL_DSP_SYNC): Broken pipe
cannot submit datapipe for urb 0, error -28: not enough bandwidth
(I've cleaned the messages up a bit from what shows on the console,
the second "cannot submit [...]" typically lands in the middle of the
"output: ioctl [...]" message).
With gpsd running (opening /dev/ttyUSB0), with "cat < /dev/event0 > /dev/null",
then "/usr/bin/madplay -Q -a -10 --no-tty-control random.mp3" seems to
screw me. Without the /dev/event0 open, I don't have the problem.
Am I screwed, or is there something I can tweak?
$ cat /proc/cpuinfo
system type : Broadcom BCM47xx
processor : 0
cpu model : Broadcom BCM3302 V0.7
BogoMIPS : 197.12
wait instruction : yes
microsecond timers : yes
tlb_entries : 32
extra interrupt vector : no
hardware watchpoint : no
ASEs implemented :
VCED exceptions : not available
VCEI exceptions : not available
$ uname -a
Linux OpenWrt 2.6.23.1 #2 Fri Nov 23 04:56:20 PST 2007 mips unknown
$ cat /proc/bus/usb/devices
T: Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 2
B: Alloc= 3/800 us ( 0%), #Int= 2, #Iso= 8
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 2.6.23.1 ehci_hcd
S: Product=EHCI Host Controller
S: SerialNumber=0000:00:02.2
C:* #Ifs= 1 Cfg#= 1 Atr=e0 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= 4 Ivl=256ms
T: Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 4
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=05e3 ProdID=0660 Rev= 5.07
S: Product=USB2.0 Hub
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=256ms
T: Bus=03 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 3 Spd=1.5 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=046d ProdID=c001 Rev= 4.00
S: Manufacturer=Logitech
S: Product=USB Mouse
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr= 50mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=usbhid
E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=10ms
T: Bus=03 Lev=02 Prnt=02 Port=01 Cnt=02 Dev#= 4 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=067b ProdID=2303 Rev= 3.00
S: Manufacturer=Prolific Technology Inc.
S: Product=USB-Serial Controller
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=pl2303
E: Ad=81(I) Atr=03(Int.) MxPS= 10 Ivl=1ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=83(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
T: Bus=03 Lev=02 Prnt=02 Port=02 Cnt=03 Dev#= 5 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0d8c ProdID=0103 Rev= 0.10
S: Manufacturer=C-Media INC.
S: Product=C-Media USB Audio
C:* #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=500mA
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= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E: Ad=06(O) Atr=09(Isoc) MxPS= 192 Ivl=1ms
T: Bus=03 Lev=02 Prnt=02 Port=03 Cnt=04 Dev#= 6 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0781 ProdID=5151 Rev= 0.10
S: Manufacturer=SanDisk Corporation
S: Product=Cruzer Micro
S: SerialNumber=20052243530A7360A9A6
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=200mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=125us
T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 1
B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 2.6.23.1 ohci_hcd
S: Product=OHCI Host Controller
S: SerialNumber=0000:00:02.1
C:* #Ifs= 1 Cfg#= 1 Atr=e0 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= 2 Ivl=255ms
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 1
B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 2.6.23.1 ohci_hcd
S: Product=OHCI Host Controller
S: SerialNumber=0000:00:02.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 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= 2 Ivl=255ms
These modules are loaded:
$ lsmod
Module Size Used by Not tainted
usbhid 26160 0
hid 73552 1 usbhid
evdev 6016 2
input_core 18992 6 usbhid,hid,evdev
pl2303 15312 1
usb_storage 27680 1
usbserial 24448 3 pl2303
snd_usb_audio 57088 0
snd_usb_lib 11904 1 snd_usb_audio
ehci_hcd 28560 0
ohci_hcd 15088 0
sd_mod 18512 2
nf_nat_tftp 480 0
nf_conntrack_tftp 2480 1 nf_nat_tftp
nf_nat_irc 960 0
nf_conntrack_irc 2832 1 nf_nat_irc
nf_nat_ftp 1472 0
nf_conntrack_ftp 5152 1 nf_nat_ftp
snd_pcm_oss 40032 0
snd_mixer_oss 13728 1 snd_pcm_oss
snd_pcm 57056 2 snd_usb_audio,snd_pcm_oss
snd_timer 16144 1 snd_pcm
snd_rawmidi 15936 1 snd_usb_lib
snd_hwdep 4784 1 snd_usb_audio
snd_page_alloc 5168 1 snd_pcm
snd 35280 7
snd_usb_audio,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer,snd_rawmidi,snd_hwdep
soundcore 3664 1 snd
vfat 8576 1
fat 42480 1 vfat
nls_iso8859_1 2880 1
nls_cp437 4416 1
usbcore 106224 9
usbhid,pl2303,usb_storage,usbserial,snd_usb_audio,snd_usb_lib,ehci_hcd,ohci_hcd
scsi_mod 71584 2 usb_storage,sd_mod
nls_base 4416 4 vfat,fat,nls_iso8859_1,nls_cp437
switch_robo 4048 0
switch_core 5056 1 switch_robo
diag 8272 0
--
Russell Senior ``I have nine fingers; you have ten.''
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