Sorry OTG is not working on my Pi4 after upgrade to Focal, so I cannot tell. Again, pls. refer to bug #1861070
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-raspi2 in Ubuntu. https://bugs.launchpad.net/bugs/1871977 Title: g_ether not working after reboot Status in linux-raspi package in Ubuntu: Incomplete Status in linux-raspi2 package in Ubuntu: Incomplete Status in linux-raspi2 source package in Eoan: New Status in linux-raspi source package in Focal: Confirmed Bug description: There is an issue with g_ether after warm reboot. Hardware I used for testing: Thinkpad L470 + Dock, Ubuntu 19.10 USB 3.0 "A male-plug Y-cable" + USB-A to USB-C adapter Pi4 4GB powered by Y-cable connecting to dock and separate USB PSU, Ubuntu 19.10 ============================== it seems like whenever I reboot my Pi, USB gadget port is not detected. How to reproduce: 1) make sure g_ether works on Pi 4 2) make sure cdc_ether works on L470, as in dmesg it shows... [112961.147030] usb 1-3.2: new high-speed USB device number 11 using xhci_hcd [112961.237399] usb 1-3.2: New USB device found, idVendor=045e, idProduct=0301, bcdDevice= 5.03 [112961.237406] usb 1-3.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [112961.237411] usb 1-3.2: Product: USB Adapter [112961.237414] usb 1-3.2: Manufacturer: Raspberry Pi [112961.237418] usb 1-3.2: SerialNumber: ***MASKED*** [112961.245067] cdc_ether 1-3.2:1.0 eth1: register 'cdc_ether' at usb-0000:00:14.0-3.2, CDC Ethernet Device, ***MASKED*** 3) verify IP connectivity works from L470 to Pi 4. 4) reboot Pi 4; on L470 it shows: [113343.783925] usb 1-3.2: USB disconnect, device number 11 [113343.784164] cdc_ether 1-3.2:1.0 eth1: unregister 'cdc_ether' usb-0000:00:14.0-3.2, CDC Ethernet Device 5) wait for Pi 4 to become available (I use wifi on Pi 4 + ssh on L470) ============================== Expected: Pi4 should show up to L470 as USB ethernet gadget after warm reboot Actual: g_ether is loaded on Pi4 but L470 does not detect it Workaround: unplug Pi4 and plug in again, it will work; given that I am using Y-cable, unplugging will not power down Pi 4. Concern: lose connectivity that needs human intervention to correct, i.e. cannot do it remotely. Note: I remember it is detected okay before I file for bug #1861070, not sure if it is related or not. using g_cdc should be the same, but not separately tested. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1871977/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
