These modules are provided by linux-modules, not linux-modules-extra: $ dpkg -L linux-modules-5.15.0-1015-raspi | grep -E 'usbserial|ftdi' /lib/modules/5.15.0-1015-raspi/kernel/drivers/usb/serial/ftdi_sio.ko /lib/modules/5.15.0-1015-raspi/kernel/drivers/usb/serial/usbserial.ko
** Changed in: linux-raspi (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-raspi in Ubuntu. https://bugs.launchpad.net/bugs/1990595 Title: Kernel Module usbserial not available on Jammy 22.04 (Raspi 4) Status in linux-raspi package in Ubuntu: Invalid Bug description: After installing a USB to Serial Adapter on a Raspberry Pi 4 running Ubuntu Server 22.04 LTS, no tty device is created under /dev/ttyUSB... dmesg: [ 3.793123] usb 1-1.2.1: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00 [ 3.793142] usb 1-1.2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 3.793149] usb 1-1.2.1: Product: FT232R USB UART [ 3.793155] usb 1-1.2.1: Manufacturer: FTDI [ 3.793160] usb 1-1.2.1: SerialNumber: A504D2PO The usbserial and ftdi_sio kernel modules are not included in the linux-modules-extra-5.15.0-1015-raspi package. dpkg-query -L linux-modules-extra-5.15.0-1015-raspi |grep -E 'usbserial|ftdio_sio' => NO OUTPUT lsb_release -rd: Description: Ubuntu 22.04.1 LTS Release: 22.04 uname -a: Linux Host 5.15.0-1014-raspi #16-Ubuntu SMP PREEMPT Thu Aug 25 09:50:55 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux For Reference: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1947723 Configuration from /boot/config-5.15.0-1014-raspi: grep USB_SERIAL /boot/config-5.15.0-1014-raspi CONFIG_USB_SERIAL=m <= set CONFIG_USB_SERIAL_GENERIC=y <= set CONFIG_USB_SERIAL_FTDI_SIO=m <= set Fix: According to the configuration, the modules should be built. Include the modules in the package. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1990595/+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