minha interface de som USB (M-Audio Fast Track Ultra 8R) funciona bem, mas quando eu paro de tocar parece "desligar" após cerca de 5 segundos (luzes verdes aparecem no Windows apenas se você ligar o dispositivo - e eu tenho um enorme som pop que é muito chato). Uma vez que eu inicio um som depois que ele "desligou", o mesmo problema ocorre novamente (como se estivesse "inicializando").
Parece quase como se o motorista mandasse desligar o aparelho por falta de som.
Existe uma maneira de corrigir isso?
Veja alguns resultados:
$ for d in /sys/bus/usb/devices/[0-9]* ; do if [[ -e $d/product ]] ; then echo -e "'basename $d'\t'cat $d/power/control'\t'cat $d/speed'\t'cat $d/product'" ; fi ; done
1-1.4.1.1 on 480 Ultra Fast Media Reader
1-1.4.1.2 on 12 Razer DeathAdder
1-1.4.1.3 auto 480 USB2.0 Hub
1-1.4.1.3.1 on 1.5 G110 G-keys
1-1.4.1.3.3 on 1.5 Gaming Keyboard G110
1-1.4.3 on 12 Hua Xing
2-1.5 on 480 Fast Track Ultra 8R
$ cat /sys/bus/usb/devices/2-1.5/power/control
on
$ cat /sys/bus/usb/devices/2-1.5/power/level
on
$ cat /sys/bus/usb/devices/2-1.5/power/autosuspend_delay_ms
2000
$ cat /sys/bus/usb/devices/2-1.5/power/autosuspend
2
$ cat /sys/module/usbcore/parameters/autosuspend
2
$ cat /sys/module/usbcore/parameters/autosuspend
2
cat /lib/udev/rules.d/42-usb-hid-pm.rules
# do not edit this file, it will be overwritten on update
#
# Enable autosuspend for qemu emulated usb hid devices
# Note that there are buggy qemu versions which advertise remote
# wakeup support but don't actually implement it correctly. This
# is the reason why we need a match for the serial number here.
# The serial number "42" is used to tag the implementations where
# remote wakeup is working.
ACTION=="add", SUBSYSTEM=="usb", ATTR{product}=="QEMU USB Mouse", ATTR{serial}=="42", TEST=="power/control", ATTR{power/control}="auto"
ACTION=="add", SUBSYSTEM=="usb", ATTR{product}=="QEMU USB Tablet", ATTR{serial}=="42", TEST=="power/control", ATTR{power/control}="auto"
ACTION=="add", SUBSYSTEM=="usb", ATTR{product}=="QEMU USB Keyboard", ATTR{serial}=="42", TEST=="power/control", ATTR{power/control}="auto"
# Catch-all for Avocent HID devices. Keyed off interface in order to only
# trigger on HID class devices.
ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="0624", ATTR{bInterfaceClass}=="03", TEST=="../power/control", ATTR{../power/control}="auto"
# Dell DRAC 4
ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="413c", ATTR{idProduct}=="2500", TEST=="power/control", ATTR{power/control}="auto"
# Dell DRAC 5
ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="413c", ATTR{idProduct}=="0000", TEST=="power/control", ATTR{power/control}="auto"
# IBM remote access
ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="04b3", ATTR{idProduct}=="4001", TEST=="power/control", ATTR{power/control}="auto"
ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="04b3", ATTR{idProduct}=="4002", TEST=="power/control", ATTR{power/control}="auto"
ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="04b3", ATTR{idProduct}=="4012", TEST=="power/control", ATTR{power/control}="auto"
# Raritan Computer, Inc KVM.
ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="14dd", ATTR{idProduct}=="0002", TEST=="power/control", ATTR{power/control}="auto"
# USB HID devices that are internal to the machine should also be safe to autosuspend
ACTION=="add", SUBSYSTEM=="usb", SUBSYSTEMS=="usb", ATTRS{removable}=="removable", GOTO="usb_hid_pm_end"
ACTION=="add", SUBSYSTEM=="usb", SUBSYSTEMS=="usb", ATTRS{removable}=="unknown", GOTO="usb_hid_pm_end"
ACTION=="add", SUBSYSTEM=="usb", ATTR{bInterfaceClass}=="03", ATTRS{removable}=="fixed", TEST=="../power/control", ATTR{../power/control}="auto"
LABEL="usb_hid_pm_end"
Note que o modo laptop não está instalado, é um PC desktop com uma nova instalação 13.10 do Ubuntu.