USB issues on Fujitsu T2020 since a424948dde8421089826e2f782d0efe9e565707e
After commit a424948dde8421089826e2f782d0efe9e565707e (see below), and still in Kernel 3.4.2, USB will not work at all when the power controls of the according PCI device and in the usb subdirectory are set to "auto". For example:
echo auto > /sys/devices/pci0000:00/0000:00:1a.7/power/control echo auto > /sys/devices/pci0000:00/0000:00:1a.7/usb1/power/control
It only stops working when *both* are set to "auto". This is also triggered by the tunables of the powertop program.
Tested on a Fujitsu Lifebook T2020.
If this behavior is not specific to this notebook, the commit should maybe get reverted?
Thanks for any comment!
-Dennis
a424948dde8421089826e2f782d0efe9e565707e is the first bad commit commit a424948dde8421089826e2f782d0efe9e565707e
Author: Rafael J. Wysocki <[email protected]> Date: Sun Nov 6 22:21:46 2011 +0100
PCI/ACPI/PM: Avoid resuming devices that don't signal PME
Modify pci_acpi_wake_dev() to avoid resuming PME-capable devices whose PME Status bits are not set, which may happen currently if several devices are associated with the same wakeup GPE and all of them are notified whenever at least one of them signals PME.
:040000 040000 bd5d78ae9ff2b75713725ed6e16d997b0017937df801b576ab380baa48b8c19523323aa6cca0b8cb M drivers