Brian Morgret

For Martin Ayotte Thank you for all of your help. I have enjoyed working with you on the Rock pi4. I think the board has significant potential. However, I am still having difficulty. I am willing to keep trying but I don't want to take a lot of your time. Am I helping or hindering your development efforts? If you want me to continue, I am going to abandon this thread about the USB problems in the Radxa version and start a new thread on the HDMI problem in 5.78. I have a bunch of time I can commit to troubleshooting this week.

I am not having good success with 5.78. I see that the file system is expanding so I suspect a significant portion of the OS is up. I do not have HDMI. My 4k Samsung says "Mode not supported". I also tried it on a generic 1080p and just got a blank screen. I don't see a /boot/config.txt file and my quick perusal thru the /boot directory didn't help me much, so I am not sure how to proceed.

5.73 dated 1/28 appears to be the latest on dl.armbian.com/rockpi-4b

I used the Armbian image from the radxa website. Their Debian image has the exact same problem. Is there a better build?

dmesg [ 98.230808] usb 7-1: new full-speed USB device number 3 using xhci-hcd [ 98.346089] usb 7-1: New USB device found, idVendor=1a86, idProduct=7523 [ 98.346115] usb 7-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0 [ 98.346130] usb 7-1: Product: USB2.0-Serial 

Sorry my fault. /dev/ttyUSB0 is not coming up. I included the dmesg output in my original post.

I am attempting to use an arduino uno on a rockpi4 using armbian. The device is connecting but not bringing up /dev/ttyusb0. uname -a Linux rockpi4b 4.4.154-rk3399rockpi4b #26 SMP Mon Dec 10 09:26:20 CST 2018 aarch64 GNU/Linux dmesg [ 98.230808] usb 7-1: new full-speed USB device number 3 using xhci-hcd [ 98.346089] usb 7-1: New USB device found, idVendor=1a86, idProduct=7523 [ 98.346115] usb 7-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0 [ 98.346130] usb 7-1: Product: USB2.0-Serial lsusb -t /: Bus 08.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M /: Bus 07.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M |__ Port 1: Dev 4, If 0, Class=Vendor Specific Class, Driver=, 12M /: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M /: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=ohci-platform/1p, 12M /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=ohci-platform/1p, 12M |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 1: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 12M /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-platform/1p, 480M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-platform/1p, 480M lsusb -v Bus 007 Device 003: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter Couldn't open device, some information will be missing Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.10 bDeviceClass 255 Vendor Specific Class bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x1a86 QinHeng Electronics idProduct 0x7523 HL-340 USB-Serial adapter bcdDevice 2.63 iManufacturer 0 iProduct 2 iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 39 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 98mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 3 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 1 bInterfaceProtocol 2 iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0020 1x 32 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0020 1x 32 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0008 1x 8 bytes bInterval 1