This issue is a long time coming. I got a mini pc (Asrock Deskmini h110, i5-6400, 16gb) that I have used for a long time with Kubuntu/Kde Neon, and most of its life, it worked great. Some years ago, it started freezing, especially at Graphic intensive workload, so I thought some hardware issue and converted it into a NAS and it worked absolutely fine as well for a couple of years there too. Recently my wife needed a Windows PC to do some work, and since I had upgraded my NAS, I repurposed the same PC and installed Windows on it, and it worked absolutely fine for her too. Then I decided to check some Graphics intensive workload, like 3d benchmarking stuff, and it didn't freeze once. I was delighted, and thought maybe I didn't investigated the issue the first time, and the PC was fine all along. So I reinstalled Debian 13, and lo behold, the issue came back. I found out while I was using IKEA's 3d kitchen planner. So I replaced distros, and it froze on Ubuntu and CachyOS as well. I tried switching between Wayland and X11, switched browsers, but PC freezes seconds logging into IKEA's kitchen planner (as soon as 3d graphics are loaded). I reinstalled windows, and my wife has been designing a kitchen in IKEA's 3d kitchen planner for over an hour now, and it hasn't frozen once. What's going on? How do I even investigate this?
I have reinstalled Linux and had sudo dmesg -w running, but no logs are captured before it's frozen. I have reproduced the issue multiple times now on Linux, and not once it froze on Windows. I have also done memtests, and tried multiple disks both nvme and sata. Also have tried multiple browsers with apt and flatpaks. I really need Lemmy's collective intelligence to help me here.
Update: Well system stopped hanging with 'nomodeset' as boot parameter, confirming that it's Intel 915 driver. I tried variety of Intel related kernel parameters like psr, dc, guc, even messed with Intel cstate, but it hanged every time Intel 915 driver is even loaded. So ???