Ubuntu 26.04 stuck on boot/logo - AMD GPU failure? Only works with nomodeset & video=SVIDEO-1:d

Hi everyone, I'm struggling with an HP laptop running the latest Ubuntu ​The issue: The laptop hangs indefinitely on the HP/Ubuntu logo during boot. Before switching to Linux, Windows 10 would boot but instantly crash into a solid blue screen (no text, just color) as soon as any video or hardware acceleration was triggered. ​What I've done so far: ​I can only boot into the desktop using nomodeset. ​Even with nomodeset, it was hanging on the logo until I added video=SVIDEO-1:d to the GRUB command line. ​Once booted, performance is extremely poor (software rendering, obviously). I’m getting about 13-30 FPS in simple tasks/games like osu! because the CPU is doing all the work. ​Hardware/Specs: ​Laptop: HP ​CPU/GPU:amd ryzen 5 3500u apu vega 8 ​OS: Ubuntu 26.04 LTS ​It looks like a hardware failure of the AMD GPU block, but I'm looking for a way to maybe "partially" enable some drivers or bypass the specific faulty instruction that causes the hang. ​Is there any way to get even basic hardware acceleration without triggering the "blue screen of death" / total system hang? Or am I stuck with software rendering forever? ​Thanks in advance!