1

Goal: configuring my RPi 4 to act as a bridge/router between the cafe wifi downstairs and my private network while also using Pi-hole for my local network. Effectively, my wlan0 connects to the cafe (WAN), and I have a TrendNet adapter wlan1 to broadcast my LAN. I am also trying to share wlan0 with eth0 for a NAS.

Was playing around with overclocking and one article advised running rpi-update, which I did sadly (ignoring its warnings as well as many other articles). I found out soon after that my TrendNet was not getting picked up and figured the new firmware was not compatible the old driver. No problem, I thought, as I tried to reinstall the driver but was met with Your kernel header files aren't properly installed.

I then followed steps to revert rpi-update using sudo apt-get install --reinstall raspberrypi-bootloader raspberrypi-kernel, but after reboot found that the kernel did not change. rpi-update had brought me to version 6.6.25-v8+, while the --reinstall installed 6.1.21-v8+. Fiddling around with boot config has yielded no fruit. Looking for an answer before I resort to wiping and reinstalling RPi OS Bookworm.

Main issue: uname -r always gives 6.6.25-v8+ after rpi-update but I want to roll back to 6.1.21-v8+. How is this possible?

Edit: Additional info

$ ls /usr/lib/modules
6.1.0-18-arm64       6.1.0-rpi8-rpi-2712  6.6.20+rpt-rpi-2712  6.6.25-v8-16k+
6.1.0-rpi7-rpi-2712  6.1.0-rpi8-rpi-v8    6.6.20+rpt-rpi-v8
6.1.0-rpi7-rpi-v8    6.1.21-v8+           6.6.25-v8+

$ cat /boot/firmware/config.txt


For more options and information see


http://rptl.io/configtxt


Some settings may impact device functionality. See link above for details


Uncomment some or all of these to enable the optional hardware interfaces


#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on


Enable audio (loads snd_bcm2835)


dtparam=audio=on


Additional overlays and parameters are documented


/boot/firmware/overlays/README


Automatically load overlays for detected cameras


camera_auto_detect=1


Automatically load overlays for detected DSI displays


display_auto_detect=1


Automatically load initramfs files, if found


auto_initramfs=1


Enable DRM VC4 V3D driver


dtoverlay=vc4-kms-v3d
max_framebuffers=2


Don't have the firmware create an initial video= setting in cmdline.txt.


Use the kernel's default instead.


disable_fw_kms_setup=1


Run in 64-bit mode


arm_64bit=1


Disable compensation for displays with overscan


disable_overscan=1


Run as fast as firmware / board allows


arm_boost=1


[cm4]


Enable host mode on the 2711 built-in XHCI USB controller.


This line should be removed if the legacy DWC2 controller is required


(e.g. for USB device mode) or if USB support is not required.


otg_mode=1


[all]


Uncomment to overclock. Default CPU is 1500, default GPU is 500


over_voltage=6
arm_freq=2100
gpu_freq=700
letmeinLetMeInLETM
  • 13
  • 5

1 Answers1

0

sudo apt update; sudo apt install --reinstall libraspberrypi0 libraspberrypi-{bin,dev,doc} raspberrypi-bootloader raspberrypi-kernel will put it back to the latest supported kernel/bootcode (which is currently 6.6.20 on Pi4 Bookworm and this is what you would get if you re-install).

See https://www.raspberrypi.com/documentation/computers/os.html#rpi-update which suggests sudo apt-get update sudo apt install --reinstall raspi-firmware for Bookworm.

sudo apt list --installed | grep headers will show installed headers.
Any which say "auto-removable" can be deleted with sudo apt auto-remove

Milliways
  • 62,573
  • 32
  • 113
  • 225