As HP only releases their BIOS firmware update for my model in 64bits Windows-only exe, and after many attempts to do it without installing windows (WinPE live, for example) has failed I ended formatting everything, installing windows 8, updating the BIOS and then restoring Ubuntu.
My system is working now, fortunatelly without screen freezing.
As HP only releases their BIOS firmware update for my model in 64bits Windows-only exe, and after many attempts to do it without installing windows (WinPE live, for example) has failed I ended formatting everything, installing windows 8, updating the BIOS and then restoring Ubuntu.
My system is working now, fortunatelly without screen freezing.
Thank you, for your help Christopher!