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Any advice on where to go from here? This console was running dmesg -w to try and catch an intermittent crash... And this is what I got. I am using an el cheapo USB wifi adapter that I'm suspicious of.
Everything was working fine until I rebuilt nixos with Nvidia support... Now my old generations of the OS are crashing after a few minutes (display on, no response to input, keyboard lights don't respond, SysRq doesn't work)
I think You're right, it is a mediatek chip and I used to add the USB device id manually to load the module, but with nixos 23.11 it started working automatically. I'm also running a preemptable kernel... Probably related now that I think about it :P
I should track down the firmware, that was one of the things I was looking into when setting up the device id hack.
I think this happened once before after uptime of about a week... But I didn't get any information from that crash. Also, I'm remembering that some configurations were failing to see this wifi device and falling back to wired so maybe this has been a hidden problem since the new nixos release...
Thanks to everyone for your thoughts, it's very helpful.