tinker downgrade

tinker-downgrade.log

q@tinkerboard:/var/cache/apt/archives$ dpkg-deb -I linux-image-current-rockchip_20.11_armhf.deb
 new Debian package, version 2.0.
 size 27169880 bytes: control archive=50048 bytes.
     403 bytes,    12 lines      control
  194536 bytes,  1942 lines      md5sums
     428 bytes,    15 lines   *  postinst             #!/bin/bash
     299 bytes,    12 lines   *  postrm               #!/bin/bash
     932 bytes,    34 lines   *  preinst              #!/bin/bash
     297 bytes,    12 lines   *  prerm                #!/bin/bash
 Package: linux-image-current-rockchip
 Source: linux-5.8.18-rockchip
 Version: 20.11
 Architecture: armhf
 Maintainer: Igor Pecovnik <igor.pecovnik@****l.com>
 Installed-Size: 80090
 Section: kernel
 Priority: optional
 Homepage: http://www.kernel.org/
 Description: Linux kernel, version 5.8.18-rockchip
  This package contains the Linux kernel, modules and corresponding other
  files, version: 5.8.18-rockchip.
q@tinkerboard:/var/cache/apt/archives$ uname -a
Linux tinkerboard 5.9.14-rockchip #20.11.3 SMP PREEMPT Fri Dec 11 22:00:29 CET 2020 armv7l armv7l armv7l GNU/Linux
q@tinkerboard:/var/cache/apt/archives$ sudo apt install linux-image-current-rockchip_20.11_armhf.deb
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package linux-image-current-rockchip_20.11_armhf.deb
q@tinkerboard:/var/cache/apt/archives$ sudo dpkg -i linux-image-current-rockchip_20.11_armhf.deb
dpkg: warning: downgrading linux-image-current-rockchip from 20.11.3 to 20.11
(Reading database ... 112356 files and directories currently installed.)
Preparing to unpack linux-image-current-rockchip_20.11_armhf.deb ...
update-initramfs: Deleting /boot/initrd.img-5.9.14-rockchip
Removing obsolete file uInitrd-5.9.14-rockchip
Unpacking linux-image-current-rockchip (20.11) over (20.11.3) ...
Setting up linux-image-current-rockchip (20.11) ...
update-initramfs: Generating /boot/initrd.img-5.8.18-rockchip
update-initramfs: Converting to u-boot format
q@tinkerboard:/var/cache/apt/archives$ sudo reboot