F20: what connects the lid switch to triggering suspend?

Andrew Lutomirski luto at mit.edu
Thu Mar 13 22:38:45 UTC 2014


On Thu, Mar 13, 2014 at 3:07 PM, Martin Langhoff
<martin.langhoff at gmail.com> wrote:
> My Lenovo X220, running up-to-date F20 occasionally gets into a state where
> closing the laptop lid does not trigger suspend.
>
> I want to narrow down on the problem, but I'm slightly lost on how
> "the signal is routed" through the stack. udev->?-> systemd-suspend ->
> kernel  ?

I wonder whether this is related to the fact that, on most Lenovos, if
you press the suspect button twice without waiting long enough, the
second press is ignored.

--Andy, wearing his very-occasional-lenovo-driver-hacker hat

>
> thank you!
>
>
>
> m
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