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Yes, I have. I know all this. I also know that the phone I was using back then is discontinued from what I can read from the LineageOS website. Which should not

by jraph 3y ago

Yes, I have. I know all this. I also know that the phone I was using back then is discontinued from what I can read from the LineageOS website. Which should not happen for a 7 years old device. And in any case, I strongly believe I should not have to use proprietary drivers. > And maybe it takes a little bit longer to get a GPS fix (I'm talking a couple of minutes, sometimes). That's probably related to A-GPS. The modem should be able to receive A-GPS data from the phone. It might even be able to fetch this data by itself. Have you tried microG? I had no such issues when I was using an Android phone with Lineage / microG.

palata 3y ago
> That's probably related to A-GPS. Yes that's what I think, too. I use microG, and it's using the "Mozilla Location Service" (which could use some love, maybe?). Also it's not bad, just a bit slower than Google phones (but Google is really good at tracking, so I expect their A-GPS to have better data, I suppose) :-).
- jraph 3y ago
  I would export A-GPS [1] data to be the same for everyone. It's just orbital data about the satellites that the GPS satellites also send you, but at a speed of 50 bit/s and you have to wait for the satellite to start broadcast it. As a consequence, it would take about 10 mins to have a fix, while it is instantaneous when the data is already there because it was downloaded beforehand. This data is typically provided by Qualcomm for phones based on their chips, but I guess this data is provided by many other companies. This is how you would typically do it on a phone running mobile Linux / ModemManager: wget -N http://xtrapath2.izatcloud.net/xtra3gr.bin sudo mmcli -m any --location-inject-assistance-data=xtra3gr.bin And I do get an instant GPS fix on the PinePhone Pro with this. I don't know how it works on Android, I didn't know how this stuff worked back then, I would expect something in the OS to fetch and inject A-GPS data on a regular schedule but that might be something to look into on your side. Some devices are just worse than others when it comes to get a GPS fix, regardless the OS. https://en.wikipedia.org/wiki/Assisted_GPS https://en.wikipedia.org/wiki/Assisted_GPS
  - palata 3y ago
    Oh, I thought it relied on stuff like WiFi/Cell-based localization. Now I wonder if something is wrong with my software, or if the Fairphone 3+ is just slow at getting a GPS fix :)
    - jraph 3y ago
      Not for the GPS fix. Now, location is done both with GPS and with WiFi/Cell indeed.

by jraph 3y ago

palata 3y ago

> That's probably related to A-GPS. Yes that's what I think, too. I use microG, and it's using the "Mozilla Location Service" (which could use some love, maybe?). Also it's not bad, just a bit slower than Google phones (but Google is really good at tracking, so I expect their A-GPS to have better data, I suppose) :-).

jraph 3y ago
I would export A-GPS [1] data to be the same for everyone. It's just orbital data about the satellites that the GPS satellites also send you, but at a speed of 50 bit/s and you have to wait for the satellite to start broadcast it. As a consequence, it would take about 10 mins to have a fix, while it is instantaneous when the data is already there because it was downloaded beforehand. This data is typically provided by Qualcomm for phones based on their chips, but I guess this data is provided by many other companies. This is how you would typically do it on a phone running mobile Linux / ModemManager: wget -N http://xtrapath2.izatcloud.net/xtra3gr.bin sudo mmcli -m any --location-inject-assistance-data=xtra3gr.bin And I do get an instant GPS fix on the PinePhone Pro with this. I don't know how it works on Android, I didn't know how this stuff worked back then, I would expect something in the OS to fetch and inject A-GPS data on a regular schedule but that might be something to look into on your side. Some devices are just worse than others when it comes to get a GPS fix, regardless the OS. https://en.wikipedia.org/wiki/Assisted_GPS https://en.wikipedia.org/wiki/Assisted_GPS
- palata 3y ago
  Oh, I thought it relied on stuff like WiFi/Cell-based localization. Now I wonder if something is wrong with my software, or if the Fairphone 3+ is just slow at getting a GPS fix :)
  - jraph 3y ago
    Not for the GPS fix. Now, location is done both with GPS and with WiFi/Cell indeed.