I tried to connect the USB serial adapter to the Pixel3A via a OTG adapter and executed the lsusb command, and it is recognized as follows. The USB serial adapter used is the following CH340. Jan 26 08:48:07 USSMLTRDLinux02 kernel: usb 2-1.4: Product: USB2.I would like to use a USB serial adapter with Ubuntu Touch installed on a Pixel3A. Interesting how the description in syslog also corrupts Jan 26 08:48:07 USSMLTRDLinux02 mtp-probe: bus: 2, device: 39 was not an MTP device Jan 26 08:48:07 USSMLTRDLinux02 kernel: usb 2-1.4: ch341-uart converter now attached to ttyUSB2 Jan 26 08:48:07 USSMLTRDLinux02 kernel: usb 2-1.4: New USB device strings: Mfr=0, Product=2, SerialNumber=0 Jan 26 08:48:07 USSMLTRDLinux02 kernel: usb 2-1.4: New USB device found, idVendor=1a86, idProduct=7523 Jan 26 08:48:07 USSMLTRDLinux02 kernel: usb 2-1.4: new full-speed USB device number 39 using ehci-pci Jan 26 08:48:04 USSMLTRDLinux02 kernel: usb 2-1.4: USB disconnect, device number 37 These have a driver CD for Windows, works fine there. I do observe the associated access is ehci-pci, whereas the original post access was xhci_hcdĪlso I have some CH341 bases RS485 interfaces, they work just fine, same VID:PID. Jan 26 08:36:17 USSMLTRDLinux02 mtp-probe: bus: 2, device: 38 was not an MTP device Jan 26 08:36:17 USSMLTRDLinux02 kernel: usb 2-1.1: ch341-uart converter now attached to ttyUSB1 Jan 26 08:36:17 USSMLTRDLinux02 kernel: usb 2-1.1: New USB device strings: Mfr=0, Product=2, SerialNumber=0 Jan 26 08:36:17 USSMLTRDLinux02 kernel: usb 2-1.1: New USB device found, idVendor=1a86, idProduct=7523 Jan 26 08:36:17 USSMLTRDLinux02 kernel: usb 2-1.1: new full-speed USB device number 38 using ehci-pci UserGroups: adm btsync cdrom dialout dip kismet kvm libvirtd lpadmin plugdev sambashare sudo wireshark UpgradeStatus: Upgraded to wily on (39 days ago) UnreportableReason: The running kernel is not an Ubuntu kernel InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) InstallationDate: Installed on (331 days ago) unix.stackexcha nge.com/ questions/ 189896/ testing- if-hl-340- works USB serial adapter detected but not working.īus 001 Device 125: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapterĭec 18 09:35:23 pieter-ThinkPad kernel: usb 1-1: new full-speed USB device number 126 using xhci_hcdĭec 18 09:35:23 pieter-ThinkPad kernel: usb 1-1: New USB device found, idVendor=1a86, idProduct=7523ĭec 18 09:35:23 pieter-ThinkPad kernel: usb 1-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0ĭec 18 09:35:23 pieter-ThinkPad kernel: usb 1-1: Product: USB2.0-Ser!ĭec 18 09:35:23 pieter-ThinkPad kernel: ch341 1-1:1.0: ch341-uart converter detectedĭec 18 09:35:23 pieter-ThinkPad kernel: usb 1-1: ch341-uart converter now attached to ttyUSB0ĭec 18 09:35:23 pieter-ThinkPad mtp-probe: checking bus 1, device 126: "/sys/devices/ pci0000: 00/0000: 00:14.0/ usb1/1- 1"ĭec 18 09:35:23 pieter-ThinkPad mtp-probe: bus: 1, device: 126 was not an MTP device
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