SRU Justification:
Impact:
A type of Dell Inspiron Mini does not turn off bluetooth physically when
pressing F2 (rfkill hotkey).
Fix:
Current kernel code expects hardware to handle the hard-rfkill switching
spontaneously and only notify rfkill subsystem with the status change.
This patch makes kernel to explicitly fire a SMI to switch on/off
rfkill devices if BIOS reports that the hardware switch is not supported.
This patch depends on the following sauce patch in lucid kernel so is not
going upstream:
UBUNTU: SAUCE: dell-laptop: Store the HW switch status internally
rather than requerying every time
Testcase:
I tested the patch on a Dell Mini 10. It works smoothly.
** Changed in: linux (Ubuntu)
Status: Triaged => In Progress
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu)
Milestone: None => lucid-updates
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rfkill hotkey does not switch off bluetooth on Dell Inspiron Mini
https://bugs.launchpad.net/bugs/590607
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