Kodibuntu on old laptop – vga problem

Hello – I’ve decided to use an old laptop for a little multimedia centre in our bedroom until we refurbish this room and put a large screen on a wall.

The hardware is an old HP Compaq 6715B (AMD Turion x2 2×2,20 Ghz, 4GB DDR2 , 60GB SSD drive, Radeon X1250, Wireless N150 card). I have installed 2 OS’es on it – Windows 10 and Kodibuntu. Windows 10 works fine and is there, in addition, to take a look for some cases via Firefox, or for further usage of the laptop after bedroom refurbishment. This part is not a problem, only indicate, that hardware is ok, and runs fine.

A problematic part starts with Kodibuntu. It installs and configures itself (almost) properly, but there is a glitch after the restart. When it starts initially, the screen looks like a cracked one. It is a funny thing because after the restart of the Kodi session (only that, without restarting Linux itself) everything works fine. Of course, this is not an end of the world and I can live with that, but maybe somebody touch this problem before and solved it ?