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tonarino / panel-firmware

Firmware for the volume control hardware, targeting an STM32F4 board
MIT License
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Device name etc is not recognized by host until a machine restart #11

Open skywhale opened 3 years ago

skywhale commented 3 years ago

For the first time I plugged in a panel controller using native USB connection, the device was recognized as a generic USB ACM device. Manufacturer, SerialNumber, and Product name were not communicated during the handshake.

[1927774.628446] usb 11-1: new full-speed USB device number 5 using xhci_hcd
[1927774.797719] usb 11-1: string descriptor 0 read error: -71
[1927774.797724] usb 11-1: New USB device found, idVendor=16c0, idProduct=27dd, bcdDevice= 0.10
[1927774.797726] usb 11-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[1927774.992697] cdc_acm 11-1:1.0: ttyACM1: USB ACM device

I unplugged and re-plugged the USB cable, and this time Manufacturer and SerialNumber were communicated but not the Product name, resulting in a by-id path of /dev/serial/by-id/usb-tonari_27dd_tonari-dashboard-controller-v1-if00

[1928282.322129] usb 11-1: USB disconnect, device number 5
[1928284.288426] usb 11-1: new full-speed USB device number 6 using xhci_hcd
[1928284.462846] usb 11-1: New USB device found, idVendor=16c0, idProduct=27dd, bcdDevice= 0.10
[1928284.462849] usb 11-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[1928284.462851] usb 11-1: Manufacturer: tonari
[1928284.462853] usb 11-1: SerialNumber: tonari-dashboard-controller-v1

I rebooted the host machine, and all of Manufacturer, SerialNumber and Product name were communicated and the device was recognized as /dev/serial/by-id/usb-tonari_tonari_dashboard_controller_tonari-dashboard-controller-v1-if00

skywhale commented 3 years ago

The exact same thing happened with frontier-tokyo and frontier-osaka, so it was not something specific to a state of a machine.