----- Original message ----- > I am continuing to have problems with the gps functionality on my N810. > Please note the use of "functionality" here - from everything I can tell, > the gps hardware works fine - this looks to be a firmware/driver bug or a > problem somewhere else in the management stack of the gps 'subsystem' > > The problem is this: > When newly booted, the GPS works basically fine - seems to take a little > long to get a fix, but workable.? If I then shut the GPS off (using the > panel applet, or by closing the map application.? When I try to start the > GPS back up, I get nothing.? A `cat /dev/pgps` gives absolutely nothing, so > there is a problem somewhere in the stack, not with getting a fix - when > the gps is activated and gpsd is running, /dev/pgps should ALWAYS be > emitting some form of data.? Correct me if I'm wrong. > > `killall -HUP gpsdriver` > and > `killall -HUP gpsd` > > do not solve the problem.? A reboot does (although sometimes the reboot > doesn't seem to entirely 'take' and has to be repeated) > > My understanding of the gps stack (from forums and `ps -aef|grep gps` is: > --- > SirfIII gps hardware > > gpsd 1.0-23 (osso branded) (/usr/sbin/gpsd -n -N -F /tmp/.gpsd_ctrl_sock > /dev/pgp) -- I believe it is really "/dev/pgps" and is being truncated for > some reason in ps > > gpsdriver (?proprietary? - no help available for runtime parametes) -- > (/usr/sbin/gpsdriver) > > [gpsd] -- ?what is this?? I have never seen anything like this with gpsd on > other systems > > /usr/libexec/navicore-gpsd-helper (bundled 3rd party binary app that kick > starts the gps unit) OR the control panel applet. > --- > > How can I trace what is going when the gps subsystem fails?? Do I actually > have a bad unit?? I'm past the return from where I bought it so this would > be a warranty issue, but I really think it is a bug somewhere in the > software stack, not a problem in the hardware. > > I would appreciate any pointers on troubleshooting this - when the GPS > works, it is great, but it is _extremely_ frustrating to have these kind of > issues on a $450 device. disabling the gps (using the checkbox in the applet control) and re-enqabling it seems to kick it back to working when it fails. I still think something is wrong either at the firmware or driver level and would be interested in helping troubleshoot it further, but I need some help on this. I'll submit a bugreport tomorrow, as I think I finally have enough info to make it useful. > > Also, if there is (or can be made) any documentation available for how to > programmatically interface to the gps, that would be very helpful.? I did > not buy this unit for the built in mapping program and have no intention of > using it - I want to be able to control the gps (including power on and > power off) from the OS (and not using GUI applets or binary-only 3rd party > apps). I spoke prematurely here. I apologize. I just found today the information here: http://maemo.org/development/documentation/apis/4-x/ and specifically, this: http://maemo.org/api_refs/4.0/gpsmgr/index.html which is exactly what I was looking for.
