Solved How old is too old?

In that case, you have nothing to worry about. If that iMac ever craps out; just take out the CPU and repurpose it in another motherboard. Scrap the rest. Easy peasy.
 
I plan to daily drive it until the problem worsens delay further productivity as I continue to stay on the 14-RELEASE branch progressing my way to future releases and see how it's like. I build a gaming PC in 2018 (Ryzen 5 2600/GTX 1070) left untouched from that period so would be a fallback when the time comes. As far as I know even with GPUs that are from 2009 era as long they are supported from intel/AMD open drivers (post nvidia 340 driver) there won't be much of an issue like I have.
I have an iMac 12,2 (mid-2011, 27") that I got for cheap earlier this year. I replaced the nvidia gpu it came with with an AMD WX 4130, and put in an SSD instead of the old HDD. The machine works great with Debian 13 and is my main workstation computer now. Even found an old Belkin Thunderbolt 3 docking station that works with the Apple bi-directional Thunderbolt I/II (miniDP) <-> USB-C adapter, so I have USB 3.0 ports available. Works great! These older iMacs are pretty easy to service and take a lot of parts that can be bough cheaply on eBay. And great displays!
 
Software should be removed when there is something wrong with it, not just because it is inactive upstream. There is such a thing as finished software that just runs indefinitely.
I spent an awful lot of time trying to get FreeBSD working on a GoFlex Home unit. I managed to get it booting from a USB stick but never worked out how to get it to boot from a hard disk. I had to abandon my profect since support for Arm v5 was pulled. There was nothing wrong with what was available so I don't understand why support was removed.

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Periodic stall and recovery tells me something is too hot.

How long since system and PSU opened up for cleaning and inspection? Look for popped capacitors everywhere.

Check CPU temps, perhaps the conductive paste needs a refresh.
 
Periodic stall and recovery tells me something is too hot.

How long since system and PSU opened up for cleaning and inspection? Look for popped capacitors everywhere.

Check CPU temps, perhaps the conductive paste needs a refresh.
I wish it was a temperature problem, but after I messed up the libglx in the xorg module extension directory i reinstalled xorg server and havent gotten the black screen since
 
Cool, I didn't know that memory tests can be inadvertently related with the Nvidia GPU. I will look into the xorg module extension to see what happened then into the memtest.
 
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