I have an old desktop computer which I would like to keep on using as it suits me very well, although it is low spec. It has an Intel Core Duo processor and 2GB of RAM. However if I attempt to boot any kernel of the 4.14 series or later with acpi active, I get a kernel panic. None of the earlier kernels show this behaviour. I have not been able to capture the complete panic sequence because it occurs so early in the boot process, but the attachment shows as much of it as I was able to transcribe. As you can see, all the named functions are acpi functions, most of them in drivers/acpi/scan.c and drivers/acpi/bus.c, although there are some acpica functions as well. If I boot with acpi=off or simply don't build the acpi driver, there is no panic. However that is hardly an ideal solution. Lesser degrees of acpi inhibition (for example acpi=ht or pci=noacpi) are not effective. I tried a git bisection to see if I could find the commit that caused the problem but I can't see the relevance of the final answer that I got: Bisecting: 0 revisions left to test after this (roughly 0 steps) [7744ccdbc16f0ac4adae21b3678af93775b3a386] x86/mm: Add Secure Memory Encryption (SME) support. As far as I can gather from my reading, SME is purely an amd thing and I have an Intel chip, so I don't have this option activated in my kernel config file. How then could it create an acpi panic? I would be grateful for any help or advice on this. -- Hazel Russman
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kernel_panic
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