Yes, inadequate shielding of the IO lines can cause spurious interrupts,
and has certainly been in the past the main cause of hotplug storms. In
this case, I suspect it is the firmware / firmware driver that is broken
and causing the interrupt storm. Short of physically inspecting the
signal lines, I'm not sure if you will get a definitive answer.

There is no mechanism to manually disable the hotplug interrupts without
recompiling the code. There is magic in v3.10 that is meant to
autodetect this, but it did not actually leave any telltale in your
log... So I am beginning to suspect that it is not just a lot of hotplug
events, but also the processing of each one that is slow.

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https://bugs.launchpad.net/bugs/1183089

Title:
  xorg freezes on macbook air unplugging thunderbolt display

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