Right, gang. Getting this thread back on track...
My suspicion IS confirmed.
Midori-portable will NOT run on the HP desktop rig. That's indisputable, and has been proved now on multiple occasions. This is entirely down to the Intel Pentium 'Gold' G5400 in this rig, which has been deliberately & intentionally "crippled" by Intel themselves.
I've just tried it out on the E6430 Dell Latitude I use in the front room in the evenings. Despite being several years older than the HP Pavilion, its Core-i5 has the AVX instruction set. Guess what? Yup; as suspected, it runs fine here. Which confirms what I've been thinking for a couple of weeks now; with the move to 11.5, the Astian team have upgraded their compile environment.....which now builds with the requirement for AVX to be present in the CPU.
So; for those of you who - like me - are getting the "Illegal instruction" error message upon trying to run Midori, ya now know WHY this is so. Unfortunately, this is a hardware limitation.....and no amount of software jiggery-pokery will "fix" it. No workarounds will make it run. The only fix will be a newer CPU.....which for many will mean a newer (or different) machine.
I do at least have the option to upgrade my CPU; desktops still have that advantage. A Core-i5 8500 will do exactly what I need, because it's the same-gen "Coffee Lake" architecture, just with AVX included. However, I won't be taking this rather drastic step simply for a pair of browsers that aren't even my regular "daily drivers"; I shall reserve this step for when ALL browsers start pulling this same stunt. (Probably won't be too much further down the line, but.....we'll see).
Unless Astian relent, and make a specific SSE2 build for 'non-compliant' hardware, Midori will henceforth be OFF THE MENU. Literally!
Sorry to be the bearer of bad news, but.....shit happens, I'm afraid.
Posting from Midori 11.5 on the E6430 Latitude right now.....it's still a good, lightweight browser, just unfortunate the Astian team have taken this step. But I suspect this sort of thing will be happening more frequently now, since AVX is present on ALL modern CPUs.
Mike. 