The Panasonic Let's Note CF-SV1 is a 12.1" laptop released in 2021, based on the Intel Tiger Lake platform (11th Gen Core i5/i7). It is the successor to the CF-SV9.

The firmware uses the classic AMI text-mode setup utility (blue background, keyboard-only navigation). The interface uses standard menu navigation (arrow keys, Enter, Esc). A mouse is not required.

fwupd detects the system as Panasonic Corporation CFSV1-2. Panasonic does not distribute BIOS updates through fwupd; only the Secure Boot key database is manageable this way. BIOS updates must be applied from Windows.

The system uses UEFI (2.70, x64). Secure Boot is supported.

The device has a small round touchpad. libinput does not have support for circular scrolling, which means you cannot get circular scrolling in Wayland. Under Xorg, with xf86-input-synaptics installed, circular scrolling works with the following configuration section:

/etc/X11/xorg.conf.d/70-synaptics.conf

Section "InputClass"
 Identifier "Synaptics TM3562-003"
 Driver "synaptics"
 MatchIsTouchpad "on"
 MatchDevicePath "/dev/input/event*"
 Option "CircularScrolling" "on"
 Option "CircScrollTrigger" "0"
 Option "CircularPad" "on"
 Option "LeftEdge" "80"
 Option "RightEdge" "450"
 Option "TopEdge" "80"
 Option "BottomEdge" "450"
EndSection

After saving the file, restart Xorg.

The Xorg solution above does not work on Wayland. The letsnote-wheelpad-git^AUR package provides a daemon that implements circular scrolling on both Wayland and X11.

Requires Sound Open Firmware to fully function.

The webcam exposes four V4L2 nodes via uvcvideo: two for the visible-light camera (/dev/video0, /dev/video1) and two for an IR camera (/dev/video2, /dev/video3). The IR node captures 8-bit greyscale frames but has not been tested with any application (e.g. Howdy for face authentication). The IR emitter, if present, has not been verified to illuminate.

The CF-SV1 can be configured with a Sierra Wireless AirPrime MC7455 LTE modem (USB ID 1199:9071). It is detected by both the qcserial driver (serial interfaces) and cdc_mbim (MBIM interface), but has not been tested with ModemManager or NetworkManager.

By default, the laptop ships in "eco" mode — CPU power is capped at approximately 10W via DPTF, and the fan runs continuously. The Embedded Controller (EC) exposes ACPI methods for setting power modes and fan profiles, but Linux does not actively manage them. The firmware exposes two power modes: "perf" (power limits unlocked, DPTF disabled) and "eco" (DPTF limits active), and two fan profiles: "cool" (firmware perf curve) and "quiet" (firmware eco curve). These names are not official Panasonic terminology. The fan RPM is not readable — the ACPI _FST method always returns 0xFFFFFFFF, so lm_sensors reports N/A. There is no userspace interface to adjust these without writing to the EC.

The panafanpwr^AUR package provides a daemon that writes to the EC via ACPI calls to control fan speed and power limits, integrating with power-profiles-daemon.

The panasonic_laptop driver's keymap does not match the ACPI events this firmware emits. All function keys produce only 0x0030 and 0x0031 as ACPI events, appearing in the kernel log as Unknown hotkey event. The function keys work via PS/2 scancodes, not the ACPI hotkey interface.

• panasonic-laptop.c — kernel driver source
• letsnote-wheelpad — circular scrolling daemon
• panafanpwr — fan and power control daemon
• Panasonic CF-SV9 — predecessor, same Let's Note family