Hi Christof,
> Any ideas what the reason for this change could be? Was there a change
> in Gecko?
Yes, we phase in a change in Gecko.
Bug 1216148 shows the whole story.
The patch was phased in one weeks ago. (1/13)
> And if so, what would an application have to do to prevent
> GPS being turned off? Is there any resource lock to acquire to prevent
> this?
You need to use wakelock to keep GPS on.
*window.navigator.requestWakeLock('Gps');*
P.S. Ya-Chieh is modifying the content of MDN for this change currently.
Alphan Chen 陳俊帆
Software Engineer | Mozilla Taiwan
Tel: +886-2-87861100#214 | Mobile: +886-937589694
Email: [email protected] | Skype: alphan102
On Mon, Jan 18, 2016 at 2:54 AM, Christof Meerwald <[email protected]>
wrote:
> Hi,
>
> I am using a ZTE Open C with nightly builds from
> http://builds.firefoxos.mozfr.org/opencebay/ and am seeing a change in
> behaviour for GPS when the screen is switched off.
>
> It used to be the case that an app would still receive GPS location
> updates (using the navigator.geolocation.watchPosition API) when the
> user turned the screen off. But with recent build (last week) it
> appears that GPS is turned off when the user turns off the screen and
> only turned on again when the user turns the screen back on (and it
> takes a few seconds to get a new location via GPS).
>
> Any ideas what the reason for this change could be? Was there a change
> in Gecko? And if so, what would an application have to do to prevent
> GPS being turned off? Is there any resource lock to acquire to prevent
> this?
>
>
> Christof
>
> --
>
> http://cmeerw.org sip:cmeerw at cmeerw.org
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