I'm having the same problem all of a sudden this morning on a Dell
E6530. However, the kernel option intremap=off workaround does not
work for me.
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https://bugs.launchpad.net/bugs/1343151
Thanks for the suggestions. I tried all of those settings and none
helped the wifi problem. (note that acpi=noirq and pci=noacpi caused the
keyboard not to work too). There is something deeper broken.
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