[ltp] ACPI dead hotkey BIOS issue - report? ignore? document?

Mark Wotton linux-thinkpad@linux-thinkpad.org
Sat, 5 Jan 2013 10:55:13 +1100

only tangentially related, but what acpi handler scripts are you
using? I'm running Ubuntu on a T410 - power management used to be ok
in Gnome, but since I switched to unadorned XMonad, I don't get
suspend-on-screen-close or hibernate-on-low battery.


On Sat, Jan 5, 2013 at 8:52 AM, Ethan Schoonover <es@ethanschoonover.com> wrote:
> Running Arch+Xmonad, no DE, on an x220 tablet model. I just changed a couple
> BIOS settings, rebooted and noted that *all* multimedia keys were dead dead
> dead. ACPI reported battery data but all acpi events as reported by
> `acpi_listen` were gone and so my acpi handler scripts and xmonad mutlimedia
> key bindings were useless. BIOS direct keys like wifi soft kill and LCD
> brightness were also dead.
> First suspect was the fn-ctrl swap BIOS setting I'd changed. Nope. After
> reverting one by one, it turned out to be the apparently unrelated "usb
> always on" (keeps usb power on during suspend) setting. When that setting is
> *off* (i.e. BIOS set to not provide USB charge power during suspend) in my
> x220's bios (BIOS Revision: 1.36) it kills acpi related hotkeys, apparently.
> I'm wondering what I should do with this information. I'm not sure it's an
> ACPI bug, a BIOS bug, something worth documenting (outside of submitting
> here), etc. It's "fixed" for me but was one of the weirdest acpi problems
> I've encountered .
> -Ethan
> http://ethanschoonover.com/solarized

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