Michael Liesenberg
Member
Hi,
i want to use teensy 4.0 with my arm linux debian with kernel 4.1.15.
If i set the usb to one type only like USB Type: "Audio", it will list in the usb devices and also works as a sound card with no problem.
If i use USB Type: "Serial" it will list as /dev/ttyACM0 with no problem. If i use USB Type: "MIDI" it will be listed in the usb devices.
But if i use all three USB Type: "Audio+MIDI+Serial" it wont be listed in the usb devices and not in /dev/ttyACM0 and not recognized as sound card.
Must i activate a kernel module to make the usb device work? What would be the usb name device?
In dmesg i see the kernel message:
[ 708.640311] usb 1-1.4: new high-speed USB device number 25 using ci_hdrc
So it is using the ci_hdrc right? But why wont it show up in lsusb or /dev/ttyACM0 or
Kernel message for USB Type: "Audio"
[ 1130.735921] usb 1-1.3: new high-speed USB device number 17 using ci_hdrc
[ 1130.873008] hid-generic 0003:16C0:04D2.0006: device has no listeners, quitting
[ 1130.882969] usb 1-1.3: Warning! Unlikely big volume range (=4095), cval->res is probably wrong.
[ 1130.891018] usb 1-1.3: [49] FU [PCM Playback Volume] ch = 2, val = 0/4095/1
Kernel message for USB Type: "Serial"
[ 1267.440991] usb 1-1.3: new high-speed USB device number 18 using ci_hdrc
[ 1267.586658] cdc_acm 1-1.3:1.0: ttyACM0: USB ACM device
Kernel message for USB Type: "MIDI"
[ 1327.088874] usb 1-1.5: new high-speed USB device number 20 using ci_hdrc
[ 1327.232500] hid-generic 0003:16C0:0485.0008: device has no listeners, quitting
Is there a way to enable "Audio+Serial" only as usb type?
i want to use teensy 4.0 with my arm linux debian with kernel 4.1.15.
If i set the usb to one type only like USB Type: "Audio", it will list in the usb devices and also works as a sound card with no problem.
If i use USB Type: "Serial" it will list as /dev/ttyACM0 with no problem. If i use USB Type: "MIDI" it will be listed in the usb devices.
But if i use all three USB Type: "Audio+MIDI+Serial" it wont be listed in the usb devices and not in /dev/ttyACM0 and not recognized as sound card.
Must i activate a kernel module to make the usb device work? What would be the usb name device?
In dmesg i see the kernel message:
[ 708.640311] usb 1-1.4: new high-speed USB device number 25 using ci_hdrc
So it is using the ci_hdrc right? But why wont it show up in lsusb or /dev/ttyACM0 or
Kernel message for USB Type: "Audio"
[ 1130.735921] usb 1-1.3: new high-speed USB device number 17 using ci_hdrc
[ 1130.873008] hid-generic 0003:16C0:04D2.0006: device has no listeners, quitting
[ 1130.882969] usb 1-1.3: Warning! Unlikely big volume range (=4095), cval->res is probably wrong.
[ 1130.891018] usb 1-1.3: [49] FU [PCM Playback Volume] ch = 2, val = 0/4095/1
Kernel message for USB Type: "Serial"
[ 1267.440991] usb 1-1.3: new high-speed USB device number 18 using ci_hdrc
[ 1267.586658] cdc_acm 1-1.3:1.0: ttyACM0: USB ACM device
Kernel message for USB Type: "MIDI"
[ 1327.088874] usb 1-1.5: new high-speed USB device number 20 using ci_hdrc
[ 1327.232500] hid-generic 0003:16C0:0485.0008: device has no listeners, quitting
Is there a way to enable "Audio+Serial" only as usb type?
