On Sunday, 18 August 2019 21:32:11 UTC+2, Manu EL wrote: > > I've done some testing. I use GPS only, no A-GPS. Mobile connection is off > (airplane mode). > > Testing > In the village (900m above sea level) : everything is fine with the GPS. > In the mountains (> 1000m) : I start the smartphone. I open 'GPS Test' app > => I get a GPS fix. Then I put the app in the background or lock the > screen, then I reselect the app => impossible to get a fix > Same behaviour with Osmand. Same when I close the app and then relaunch it. > > Workaround 1 > In GPS Test, I go in the A-GPS menu, do 'clear cache' or 'clear & update'. > Still no fix in GPS Test. But if I send GPS Test in the background then > select Osmand, I get a fix after 1 minute in Osmand (would be the same with > GPS Test : if I send GPS Test in the background then reselect GPS Test, I > get a fix after 1 minute in GPS Test). This workaround can be used in > emergency but is not convenient. My hypothesis is that the GPS cache is > somehow corrupted when the app is sent to background or closed. Any app > launched at this point will fail to get a fix, until the GPS cache is > cleared. > > Workaround 2 > In Osmand, I start a trace recording with recording interval set to 3 > minutes (to preserve battery). From this point, I can send Osmand in the > background or lock the screen without losing the GPS fix. It may consume a > bit of battery, but at least, I can use the GPS in mountains. That's great. > > This is a strange bug, considering it happens only in altitude, or > depending on some other parameters I'm not aware of. > > If anybody thinks about a real fix for this issue, please tell me!! >
Another vote for battery saving. GPS is usually first to go. Track recording pokes hard the usage, so it won't get "optimised". -- You received this message because you are subscribed to the Google Groups "Osmand" group. To unsubscribe from this group and stop receiving emails from it, send an email to osmand+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/osmand/3d0dacbb-cfbd-46ea-b869-94167878e285%40googlegroups.com.
