The following fixed the problem for my USB 3 Expresscard (NEC
uPD720200):
sudo echo acpiphp >> /etc/modules:
Modify /etc/default/grub to have:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pciehp_force=1
pciehp_poll_mode=1"
and run
sudo update-grub
Now hotplugging works as expected.
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https://bugs.launchpad.net/bugs/999462
Title:
ExpressCard34 slot not hotplugable after boot
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