This is my first time asking something here, so please be as tolerant as possible with any mistake that I make.

The problem:


  • I have installed ubuntu 18.10 and (sometimes ~70% chance) when I boot up the laptop I see a purple screen and then the lcd turns off (just black, without light).
  • The same happens 99% of the times, if i leave the laptop for some minutes in inactivity. When I come back, I press buttons or move the mouse and the lcd remains dead.
  • The same happens 99% of the times, if I wake the laptop from suspension.


While the screen is turned off, I can hear sounds if I hit the volume up/down buttons. Furthermore, I can blindly log in, then press Ctrl+Alt+T, write reboot and press enter (all these blindly), and the laptop reboots, prossibly to the same situation.


I tried the "nomodeset" trick and it worked, but I get a wrong resolution and extremely bad graphics performance, rendering the laptop unusable. The same goes for "radeon.modeset=0".

The same thing happend with Lubuntu 18.04.

Is there any possible solution to this problem? Thanks in advance for any suggestions.

Laptop model: HP pavilion dv6 1120ev
Graphics: ATI Mobility Radeon HD 4530


Code:
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] RV710/M92 [Mobility Radeon HD 4530/4570/545v] [1002:9553]
    Subsystem: Hewlett-Packard Company Mobility Radeon HD 4530 [103c:3628]
    Kernel driver in use: radeon
    Kernel modules: radeon