Re: A desktop environment[1] kernel wishlist

Bastien Nocera
2015-05-06T12:41:46Z

On Tue, 2015-05-05 at 12:22 -0700, Chirantan Ekbote wrote:
> On Tue, May 5, 2015 at 3:46 AM, Bastien Nocera <hadess@hadess.net>
> wrote:
> >
> > > The last thing the power manager does, right before
> > > writing "mem" to /sys/power/state, is write the wakeup_count
> > > that it
> > > read earlier to /sys/power/wakeup_count. If the write fails, the
> > > power manager considers the suspend attempt failed, reads the new
> > > wakeup_count, and starts a timer (usually 10 seconds) to retry
> > > the
> > > suspend. The same thing happens if the write to /sys/power/state
> > > fails.
> >
> > Is this something that logind should do as well?
> >
>
> We do it to avoid a race condition where a wakeup event occurs after
> userspace has started the suspend process but before anything writes
> "mem" to /sys/power/state. I'm guessing that this is something
> logind
> should be doing as well since the chances of missing a wakeup event
> increase the longer any given delay inhibitor takes to delay a
> suspend.

File https://bugzilla.freedesktop.org/show_bug.cgi?id=90339

Cheers