hi, most recent andoid phone let you connect it to a computer via USB and select the USB mode. The modes also contain midi. This e.g. allows to run a midi controller on the phone/table as a control surface for music software. If it do this with a pixel 3 phone it all works, but since it is a phone, the screen is a bit too small. If I use my pixel c tablet, the alsa device is recognized (it shows up in /proc/asound/ and also creates a midi0 entry), but there is no new entry among the alsa sequencer clients for it. I tested this both on debian testing and opensuse tumbleweed and both show the same issue. Any idea whats wrong here and especially how to debug? Stefan Pixel 3 USB Midi --------------------------------------------------------------- tail -f /var/log/kern.log Apr 22 21:49:47 ensonic.roam.corp.google.com kernel: usb 1-1: USB disconnect, device number 29 Apr 22 21:49:48 ensonic.roam.corp.google.com kernel: usb 1-1: new high-speed USB device number 30 using xhci_hcd Apr 22 21:49:49 ensonic.roam.corp.google.com kernel: usb 1-1: New USB device found, idVendor=18d1, idProduct=4ee9, bcdDevice= 4.40 Apr 22 21:49:49 ensonic.roam.corp.google.com kernel: usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Apr 22 21:49:49 ensonic.roam.corp.google.com kernel: usb 1-1: Product: Pixel 3 Apr 22 21:49:49 ensonic.roam.corp.google.com kernel: usb 1-1: Manufacturer: Google Apr 22 21:49:49 ensonic.roam.corp.google.com kernel: usb 1-1: SerialNumber: 884X00MQ8 lsusb | grep Google Bus 001 Device 021: ID 18d1:4ee9 Google Inc. Pixel 3 aseqdump -l Port Client name Port name 0:0 System Timer 0:1 System Announce 14:0 Midi Through Midi Through Port-0 20:0 Pixel 3 Pixel 3 MIDI 1 cat /proc/asound/seq/clients Client info cur clients : 3 peak clients : 7 max clients : 192 Client 0 : "System" [Kernel] Port 0 : "Timer" (Rwe-) Port 1 : "Announce" (R-e-) Client 14 : "Midi Through" [Kernel] Port 0 : "Midi Through Port-0" (RWe-) Client 20 : "Pixel 3" [Kernel] Port 0 : "Pixel 3 MIDI 1" (RWeX) ll /proc/asound/P3/ total 0 -r--r--r-- 1 root root 0 Mai 15 13:48 id -r--r--r-- 1 root root 0 Mai 15 13:48 midi0 -rw-r--r-- 1 root root 0 Mai 15 13:48 oss_mixer -r--r--r-- 1 root root 0 Mai 15 13:48 usbbus -r--r--r-- 1 root root 0 Mai 15 13:48 usbid -r--r--r-- 1 root root 0 Mai 15 13:48 usbmixer Pixel C USB Midi --------------------------------------------------------------- tail -f /var/log/kern.log Apr 22 21:48:29 ensonic.roam.corp.google.com kernel: usb 1-1: USB disconnect, device number 27 Apr 22 21:48:30 ensonic.roam.corp.google.com kernel: usb 1-1: new high-speed USB device number 28 using xhci_hcd Apr 22 21:48:30 ensonic.roam.corp.google.com kernel: usb 1-1: New USB device found, idVendor=18d1, idProduct=5209, bcdDevice= 2.23 Apr 22 21:48:30 ensonic.roam.corp.google.com kernel: usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Apr 22 21:48:30 ensonic.roam.corp.google.com kernel: usb 1-1: Product: Pixel C Apr 22 21:48:30 ensonic.roam.corp.google.com kernel: usb 1-1: Manufacturer: Google Apr 22 21:48:30 ensonic.roam.corp.google.com kernel: usb 1-1: SerialNumber: 5B16001650 lsusb | grep Google Bus 001 Device 019: ID 18d1:520a Google Inc. Pixel C aseqdump -l Port Client name Port name 0:0 System Timer 0:1 System Announce 14:0 Midi Through Midi Through Port-0 cat /proc/asound/seq/clients Client info cur clients : 2 peak clients : 7 max clients : 192 Client 0 : "System" [Kernel] Port 0 : "Timer" (Rwe-) Port 1 : "Announce" (R-e-) Client 14 : "Midi Through" [Kernel] Port 0 : "Midi Through Port-0" (RWe-) ll /proc/asound/C/ total 0 -r--r--r-- 1 root root 0 Mai 15 13:51 id -r--r--r-- 1 root root 0 Mai 15 13:51 midi0 -rw-r--r-- 1 root root 0 Mai 15 13:51 oss_mixer -r--r--r-- 1 root root 0 Mai 15 13:51 usbbus -r--r--r-- 1 root root 0 Mai 15 13:51 usbid -r--r--r-- 1 root root 0 Mai 15 13:51 usbmixer _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
