extjo

This is the output from dmesg dmesg | egrep -i 'serial|tty|dwc|usb|console' [ 0.000000] Kernel command line: root=UUID=50b7bf20-3a17-4ad2-be5d-1c3b48cc6ab8 rootwait rootfstype=ext4 console=ttyS2,1500000 consoleblank=0 loglevel=1 ubootpart=b554da78-01 usb-storage.quirks=0x2537:0x1066:u,0x2537:0x1068:u cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory swapaccount=1 [ 0.001105] Console: colour dummy device 80x25 [ 0.203340] Serial: AMBA PL011 UART driver [ 1.380801] usbcore: registered new interface driver usbfs [ 1.380899] usbcore: registered new interface driver hub [ 1.381042] usbcore: registered new device driver usb [ 3.386585] rockchip-u3phy ff470000.usb3-phy: vbus_drv is not assigned [ 3.389390] rockchip-u3phy ff470000.usb3-phy: Rockchip u3phy initialized successfully [ 3.407732] Serial: 8250/16550 driver, 8 ports, IRQ sharing disabled [ 3.412937] printk: console [ttyS2] disabled [ 3.413080] ff130000.serial: ttyS2 at MMIO 0xff130000 (irq = 12, base_baud = 1500000) is a 16550A [ 3.413235] printk: console [ttyS2] enabled [ 3.414857] Serial: AMBA driver [ 3.455134] phy phy-ff470000.usb3-phy.2: u3phy u2 power on [ 3.455172] phy phy-ff470000.usb3-phy.3: u3phy u3 power on [ 3.458142] dwc2 ff580000.usb: supply vusb_d not found, using dummy regulator [ 3.458343] dwc2 ff580000.usb: supply vusb_a not found, using dummy regulator [ 3.585600] dwc2 ff580000.usb: EPs: 10, dedicated fifos, 972 entries in SPRAM [ 3.586293] dwc2 ff580000.usb: DWC OTG Controller [ 3.586342] dwc2 ff580000.usb: new USB bus registered, assigned bus number 1 [ 3.586445] dwc2 ff580000.usb: irq 29, io mem 0xff580000 [ 3.586801] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.08 [ 3.586813] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.586829] usb usb1: Product: DWC OTG Controller [ 3.586839] usb usb1: Manufacturer: Linux 5.8.14-rockchip64 dwc2_hsotg [ 3.586852] usb usb1: SerialNumber: ff580000.usb [ 3.588094] hub 1-0:1.0: USB hub found [ 3.590785] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 3.593610] ehci-platform ff5c0000.usb: EHCI Host Controller [ 3.593657] ehci-platform ff5c0000.usb: new USB bus registered, assigned bus number 2 [ 3.593927] ehci-platform ff5c0000.usb: irq 30, io mem 0xff5c0000 [ 3.609535] ehci-platform ff5c0000.usb: USB 2.0 started, EHCI 1.00 [ 3.609974] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.08 [ 3.609987] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.610003] usb usb2: Product: EHCI Host Controller [ 3.610013] usb usb2: Manufacturer: Linux 5.8.14-rockchip64 ehci_hcd [ 3.610026] usb usb2: SerialNumber: ff5c0000.usb [ 3.611030] hub 2-0:1.0: USB hub found [ 3.611961] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 3.612827] ohci-platform ff5d0000.usb: Generic Platform OHCI controller [ 3.612867] ohci-platform ff5d0000.usb: new USB bus registered, assigned bus number 3 [ 3.613103] ohci-platform ff5d0000.usb: irq 31, io mem 0xff5d0000 [ 3.673884] usb usb3: New USB device found, idVendor=1d6b, idProduct=0001, bcdDevice= 5.08 [ 3.673897] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.673914] usb usb3: Product: Generic Platform OHCI controller [ 3.673924] usb usb3: Manufacturer: Linux 5.8.14-rockchip64 ohci_hcd [ 3.673936] usb usb3: SerialNumber: ff5d0000.usb [ 3.674957] hub 3-0:1.0: USB hub found [ 3.677001] xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 4 [ 3.678300] usb usb4: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.08 [ 3.678314] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.678330] usb usb4: Product: xHCI Host Controller [ 3.678340] usb usb4: Manufacturer: Linux 5.8.14-rockchip64 xhci-hcd [ 3.678355] usb usb4: SerialNumber: xhci-hcd.0.auto [ 3.679345] hub 4-0:1.0: USB hub found [ 3.680079] xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 5 [ 3.680114] xhci-hcd xhci-hcd.0.auto: Host supports USB 3.0 SuperSpeed [ 3.680246] usb usb5: We don't know the algorithms for LPM for this host, disabling LPM. [ 3.680503] usb usb5: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.08 [ 3.680515] usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 3.680532] usb usb5: Product: xHCI Host Controller [ 3.680542] usb usb5: Manufacturer: Linux 5.8.14-rockchip64 xhci-hcd [ 3.680557] usb usb5: SerialNumber: xhci-hcd.0.auto [ 3.681617] hub 5-0:1.0: USB hub found [ 3.682671] usbcore: registered new interface driver usb-storage [ 3.783323] usbcore: registered new interface driver usbhid [ 3.783330] usbhid: USB HID core driver [ 3.948041] friendlyelec-board board: Serial : bd82a41207725d80 [ 3.960286] dw-apb-uart ff130000.serial: forbid DMA for kernel console [ 4.017740] usb 5-1: new SuperSpeed Gen 1 USB device number 2 using xhci-hcd [ 4.038916] usb 5-1: New USB device found, idVendor=0bda, idProduct=8153, bcdDevice=31.00 [ 4.038937] usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=6 [ 4.038951] usb 5-1: Product: USB 10/100/1000 LAN [ 4.038961] usb 5-1: Manufacturer: Realtek [ 4.038979] usb 5-1: SerialNumber: 000000000000 [ 7.441048] systemd[1]: Created slice system-serial\x2dgetty.slice. [ 7.453938] systemd[1]: Condition check resulted in Dispatch Password Requests to Console Directory Watch when bootsplash is active being skipped. [ 7.712709] systemd[1]: Starting Set the console keyboard layout... [ 7.982073] g_serial gadget: Gadget Serial v2.4 [ 7.982088] g_serial gadget: g_serial ready [ 7.982108] dwc2 ff580000.usb: bound driver g_serial [ 8.104286] dwc2 ff580000.usb: new device is high-speed [ 8.140862] dwc2 ff580000.usb: new address 40 [ 8.424866] systemd[1]: Finished Set the console keyboard layout. [ 8.609200] systemd[1]: Starting Set console font and keymap... [ 8.666789] systemd[1]: Finished Set console font and keymap. [ 8.883878] systemd[1]: Found device /dev/ttyGS0. [ 9.721050] systemd[1]: Found device /dev/ttyS2. [ 9.968289] dwc2 ff580000.usb: new device is high-speed [ 10.004894] dwc2 ff580000.usb: new address 41 [ 10.336469] usb 5-1: reset SuperSpeed Gen 1 USB device number 2 using xhci-hcd [ 10.423366] usbcore: registered new interface driver r8152 [ 645.489033] printk: console [ttyGS0] disabled [ 729.112172] g_serial gadget: Gadget Serial v2.4 [ 729.112181] g_serial gadget: g_serial ready [ 729.112191] dwc2 ff580000.usb: bound driver g_serial [ 729.233924] dwc2 ff580000.usb: new device is high-speed [ 729.269376] dwc2 ff580000.usb: new address 42

This is dmesg after removing g_serial [ 645.489033] printk: console [ttyGS0] disabled After re-adding the module [ 729.112172] g_serial gadget: Gadget Serial v2.4 [ 729.112181] g_serial gadget: g_serial ready [ 729.112191] dwc2 ff580000.usb: bound driver g_serial [ 729.233924] dwc2 ff580000.usb: new device is high-speed [ 729.269376] dwc2 ff580000.usb: new address 42 The status when working systemctl status serial-getty@ttyGS0.service ● serial-getty@ttyGS0.service - Serial Getty on ttyGS0 Loaded: loaded (/lib/systemd/system/serial-getty@.service; enabled; vendor preset: enabled) Drop-In: /usr/lib/systemd/system/serial-getty@.service.d └─10-term.conf Active: active (running) since Tue 2020-10-20 10:11:39 CEST; 9s ago Docs: man:agetty(8) man:systemd-getty-generator(8) http://0pointer.de/blog/projects/serial-console.html Main PID: 1898 (agetty) Tasks: 1 (limit: 998) Memory: 232.0K CGroup: /system.slice/system-serial\x2dgetty.slice/serial-getty@ttyGS0.service └─1898 /sbin/agetty -o -p -- \u --keep-baud 115200,38400,9600 ttyGS0 linux

I have previously successfully been using the USB serial gadget as terminal on the Nanopi R2S. The last working release I have tried was: Linux 5.4.45-rockchip64 #20.05.3 SMP PREEMPT Wed Jun 10 11:47:27 CEST 2020 aarch64 aarch64 aarch64 GNU/Linux Now I am running the following version (Also tried 20.08.08) and the gadget mode does not work after boot. Linux 5.8.14-rockchip64 #20.08.10 SMP PREEMPT Tue Oct 13 16:58:01 CEST 2020 aarch64 aarch64 aarch64 GNU/Linux I have seen no warnings or error messages when running dmesg. After boot on the failing versions the log contains the following section, which I assume means that the driver loads OK. [ 7.831558] g_serial gadget: Gadget Serial v2.4 [ 7.831573] g_serial gadget: g_serial ready [ 7.831594] dwc2 ff580000.usb: bound driver g_serial The device node exists ls -l /dev/ttyGS0 crw--w---- 1 root tty 241, 0 Oct 16 12:32 /dev/ttyGS0 The service seems to be working systemctl status serial-getty@ttyGS0.service ● serial-getty@ttyGS0.service - Serial Getty on ttyGS0 Loaded: loaded (/lib/systemd/system/serial-getty@.service; enabled; vendor preset: enabled) Drop-In: /usr/lib/systemd/system/serial-getty@.service.d └─10-term.conf Active: active (running) since Fri 2020-10-16 12:32:22 CEST; 2min 52s ago Docs: man:agetty(8) man:systemd-getty-generator(8) http://0pointer.de/blog/projects/serial-console.html Main PID: 973 (agetty) Tasks: 1 (limit: 998) Memory: 304.0K CGroup: /system.slice/system-serial\x2dgetty.slice/serial-getty@ttyGS0.service └─973 /sbin/agetty -o -p -- \u --keep-baud 115200,38400,9600 ttyGS0 linux Only restarting the service has not effect, but by running the following sequence I have been able to restore functionality (until next reboot). sudo modprobe -r g_serial sudo modprobe g_serial sudo systemctl restart serial-getty@ttyGS0.service Any idea on how to fix this permanently?