Comment 3 for bug 567955

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Michael Richardson (mcr-sandelman) wrote :

Actually, you likely do have hardware for the serial ports. It's part of the legacy ISA stuff in your north bridge.
Just your laptop does not have the pins hooked up to a DB9. My laptop's docking station exposes those.

What I think is that memtest86 should look for console= in the kernel config file, and not add the serial console unless
kernel has one.