A problem solved after some detective work.
Scenario: you are running Ubuntu 13.10 (“Saucy”) and when you resume after suspend, various USB devices such as hard drives and WiFi adapters don’t wake up, causing all kinds of problems.
sudo gedit /etc/default/grub
Then update the line that says:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash usbcore.autosuspend=-1 acpi_enforce_resources=lax"
Posted on Sunday, December 29 2013Tags: ubuntu ~ linux ~ grub ~ usb ~ suspend ~ resume ~ saucy ~ 13.10
Rendered at 2015-07-29 01:15:48