I did a bit of reading - to prevent ubuntu packages to update the rockchip optimized packages, you need to pin the packages. There is a simple way to do that.
1. Create a file called rockchip-multimedia-ppu in /etc/apt/preferences.d with
Package: *
Pin: release o=LP-PPA-liujianfeng1994-rockchip-multimedia
Pin-Priority: 600
2. Create a file called panfork-mesa-ppu in /etc/apt/preferences.d with
Package: *
Pin: release o=LP-PPA-liujianfeng1994-liujianfeng1994-pan
I did a bit of reading - to prevent ubuntu packages to update the rockchip optimized packages, you need to pin the packages. There is a simple way to do that.
1. Create a file called rockchip-multimedia-ppu in /etc/apt/preferences.d with
Package: *
Pin: release o=LP-PPA-liujianfeng1994-rockchip-multimedia
Pin-Priority: 600
2. Create a file called panfork-mesa-ppu in /etc/apt/preferences.d with
Package: *
Pin: release o=LP-PPA-liujianfeng1994-liujianfeng1994-pan