Public bug reported:
[Impact]
On some Skylake-U platforms, if boots with battery only and has no USB
device connect, after boot the USB port can't be used, even though the
xHCI Host Controller doesn't report any error in dmesg. The USB device
looks like doesn't turn on, LED on USB mouse or keyboard doesn't light
up.
[Fix]
There's a fix in mainline v4.2-rc3, though it states the fix is for
Braswell, but the uuid use in the commit can also be found on Skylake-U
platforms.
Commit log is as follows:
commit c3c5819a350952439c3198aa46581f9e4c46557f
Author: Mathias Nyman <mathias.ny...@linux.intel.com>
Date: Tue Jul 21 17:20:25 2015 +0300
xhci: call BIOS workaround to enable runtime suspend on Intel
Braswell
Intel xhci hw that require XHCI_PME_STUCK quirk have as default disabled
xhci from going to D3 state in runtime suspend. Driver needs to verify
it can deal with the hw by calling an ACPI _DSM method to get D3 enabled.
Signed-off-by: Mathias Nyman <mathias.ny...@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
[Test]
1. Install the patched kernel
2. Boot with battery
3. Insert a USB device (disk, keyboard, mouse), should work normally
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Phidias (phidias-chiang)
Status: New
** Tags: vivid
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https://bugs.launchpad.net/bugs/1489292
Title:
System cannot detect USB device in BAT mode
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