Comment 86 for bug 159356

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jecks (slayerproof32) wrote : Re: System freeze on high memory usage when DMA is disabled

I’d say you probably want to start with these 4 commands and posting the results
Lspci -v
Inxi -Fzxc0
dmesg > dmesg.log (will save to ~/dmesg.log)

top -b > top.log (run this command, then trigger the memory issue. It will save to ~/top.log. If you have to hard reboot, the file will still be saved)