[Frieza] Location service fails to start cleanly, entering restart loop - service crashes on start

@Victor: Do you happen to know if the users experiencing the issue did an OTA or if they are using the pristine version present on the tablet?

Status changed to 'Confirmed' because the bug affects multiple users.

Hi Thomas, I can confirm this bug on Freiza. Currently gps and location is unusable. This happened both before updating to ota 10, and on 9.5. Any workarounds?

Thanks,

Mitchell

I can confirm this too on my Freiza with OTA-10.1. Also have no positioning through the GPS in Sensorsstats or any other app I have tried.

The button on the location tap from the top bar flashes even with GPS off.

Today the icon is showed and doesn't have the behavior shown in http://makeagif.com/i/QlHXU7.

And the situation described in comment #5 has disappeared.

Anyway, SensorsStatus nor uNAv nor Nearby scope can't get my position.

Now it has again the same behavior as described on the title. :(

For my Bq M10 Ubuntu the bug affects only the Scopes (as I can see). The GPS and localization run well in any other app: Unav, Here, Weather, Réaltaí, etc. But no scope say me where am I.

I have the M10 tablet on OTA10.1. The Location indicator is blinking on and off, making the mail indicator shift from left to right.

If I pull down the 'notifications curtain' for the location, the slide switch and legend for 'location detection' are blinking too.

I installed the SensorStatus app and that shows no values at all for GPS results. There does not appear to be any way to display satellite lock, constalation, or ephemeris age.

Here Maps reports 'Can't find your location' ; uNav says 'GPS denied'; those seem to be different to what Llamas.JM reported in comment 8. Much more like Sergi reports in comemnt 5,7

The tablet was delivered with OTA9.5 and location services worked before I applied the update.

Hi @Thomas,

Yes, the user said he updated the device to 10.1 firs off all and then he noticed the GPS indicator behaviour.

I also have an M10 tablet with OTA10.1 with an non functioning location service and intermitent GPS icon. As per BQ's request I'm attaching some (fragments of) logs.

1) "# ubuntu-location-serviced-cli --bus system --test" outputs text like this:

 length=27 context=0x3b9968
I0425 12:36:40.585892 14050 android_hardware_abstraction_layer.cpp:135] static void com::ubuntu::location::providers::gps::android::HardwareAbstractionLayer::on_nmea_update(int64_t, const char*, int, void*): timestamp=1461635998000 nmea=$GPRMC,235958.010,V,8960.0000,N,00000.0000,E,0.000,0.00,050180,,,N*4C
 length=71 context=0x3b9968
I0425 12:36:40.585973 14050 android_hardware_abstraction_layer.cpp:135] static void com::ubuntu::location::providers::gps::android::HardwareAbstractionLayer::on_nmea_update(int64_t, const char*, int, void*): timestamp=1461635998000 nmea=$GPVTG,0.00,T,,M,0.000,N,0.000,K,N*32
000,E,0.000,0.00,050180,,,N*4C
 length=39 context=0x3b9968

and exits with a segmentation fault at a random moment in time.

2) Syslog filtered by 'location':

Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395044] (0)[11591:ubuntu-location]ubuntu-location[11591]: unhandled level 3 translation fault (11) at 0x00000000, esr 0x83000007
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395064] (0)[11591:ubuntu-location]pgd = ffffffc0551c9000
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395100] (0)[11591:ubuntu-location][00000000] *pgd=000000009500f003, *pmd=0000000069405003, *pte=0000000000000000
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395157] (0)[11591:ubuntu-location]
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395180] (0)[11591:ubuntu-location]CPU: 0 PID: 11591 Comm: ubuntu-location Tainted: G W 3.10.93+ #1
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395198] (0)[11591:ubuntu-location]task: ffffffc036b62a00 ti: ffffffc036b18000 task.ti: ffffffc036b18000
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395213] (0)[11591:ubuntu-location]PC is at 0x0
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395226] (0)[11591:ubuntu-location]LR is at 0x0
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395242] (0)[11591:ubuntu-location]pc : [<0000000000000000>] lr : [<0000000000000000>] pstate: 60070010
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395254] (0)[11591:ubuntu-location]sp : 0000000000000000
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395265] (0)[11591:ubuntu-location]x29: 0000000000000000 x28: 0000000000000000
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395286] (0)[11591:ubuntu-location]x27: 0000000000000000 x26: 0000000000000000
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395306] (0)[11591:ubuntu-location]x25: 0000000000000000 x24: 0000000000000000
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395325] (0)[11591:ubuntu-location]x23: 0000000000000000 x22: 0000000000000000
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395345] (0)[11591:ubuntu-location]x21: 0000000000000000 x20: 0000000000000000
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395364] (0)[11591:ubuntu-location]x19: 0000000000000000 x18: 0000000000000000
Apr 25 12:31:57 ubuntu-phablet kernel: [ 405.395384] (0)[11591:ubuntu-location]x17: 0000000000000000 x16: 0000000000000000
Apr 25 12:31:57 ubu...

Can confirm this bug, looks the same as the GIF of the original poster.

OK, that's weird. My M10 tablet has stopped doing thatthung that's in the gif. it was flickering away before I powered it down, and when I powered up - no flickering.. I did two things before powering down that might have affected it
* I switched to 'gps only'
* I logged into HERE maps

The 'location' indicator is now off, and there is no gps position..

I have switched back to gps/wifi and still don't have a location in HERE or nuMaps

@bobharvey The same situation happened to me (comment #6).

Also odd.
My phone (BQ 4.5) has never done this. It, too, has been upgraded to OTA 10.1 . It currently works fine, with a gps position, and mapping apps can display a location.

@Mitchell: No workaround, yet. I'm investigating why the service starts crashing after the OTA. Stay tuned.

It by the way seems to put a heavy drain on battery. Normally when putting the tablet away it uses a few percent per day.

Over last night I charged the tablet to 100%, took it off the charger this morning, hardly used it (it showed 98% battery left), picked the tablet up now (which is 6 hours later) and there is only 64% battery left......

I'm on 15.04 OTA-10.1

Vacation stopped working for me on Aquaris M0 (15.04 OA-10) after an update until I turned off location services, turned off WIFI and GPS in the power saving preferences, then turned it back on and then rebooted. I'm not sure how well GPS is working but it now knows where I am and the location icon has stopped blinking.

*Location I meant. Don't seem to be able to edit?

Hi,

I have the Ubuntu M10 (updated to 10.1 after arrival) for a week now and successfully
used GPS with uNav, SensorStatus and Here Maps.

Since yesterday I encounter the above-mentioned bug. I would like to add the following observations:

After reboot everything is fine, but when I start one of the GPS apps the GPS symbol in the indicator menu
starts blinking (frequency: once per second). When I check the app
permissions I see that the list with apps which have requested GPS
access is empty.
When I reboot the M10 again the blinking stops and the list with apps which
requested GPS access is there again.
When the GPS indicator symbol is blinking (because I launched
SensorStatus) and then I start uNav, uNav gives the following error message:
    "GPS Denied"
    "Error reading the GPS status"
    "Please review your device settings"
When I go to device settings I see the following:
- Location Settings: GPS and anoymised Wi-Fi (HERE)
- Battery Settings: GPS enabled
- Secury & privacy -> Apps Permissions -> Location:0

The only way to make the GPS indicator symbol stop blinking is to switch
off GPS location detection.

No idea if this will be any help but I'm getting repeated over and over in the log indicator-location.log

** (process:2470):WARNING **: Error calling dbus method:
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Method "Get" with signature "ss" on interface "org.freedesktop.DBus.Properties" doesn't exist

Hi @stefan-kamps,

That sounds like 1565469

Hi. Similar behaviour here.
I use bq E5 -> updated to OTA 10.1. GPS works perfect.
I have bq m10 that came with OTA9.5 and directly updated to 10.1. GPS seems not to work at all (no blinking location icon but I was unable to detect exact position).

I wanted to test if GPS was working with OTA 9.5 so I reset the tablet but it restarted with OTA10.1. Location icon, this time blinks:
- Switching off GPS in battery is not possible (GPS keeps restarting)
- Switching off GPS from notification panel turns it off but keeps blinking (off)

Deactivated all scopes that requires location, installed SensorsStatus.
- SensorsStatus give no GPS data
- SensorsStatus: Found supported backend

Some reboots.
Location icon stopped blinking.

"sudo ubuntu-location-serviced-cli --bus system --test" give no output. Location icon in notifications panel keeps in on position but grey. It is not possible to tap or turn off

¿Defective GPS?

I hope those logs helps
http://paste.ubuntu.com/16371046/
http://paste.ubuntu.com/16371257/

/usr/bin/ubuntu-location-serviced is crashing for me when I load google maps in the browser and try to get my location by touching the bullseye in the page. This is the backtrace I see:

#0 0x00000000 in ?? ()
#1 0xf56549d6 in nmea_reader_parse (r=0xf54c0818) at hardware/mediatek/gps/HAL/gps_mtk_aosp.c:2299
#2 nmea_reader_addc (c=<optimized out>, r=0xf54c0818) at hardware/mediatek/gps/HAL/gps_mtk_aosp.c:2326
#3 gps_state_thread (arg=0xf565f544) at hardware/mediatek/gps/HAL/gps_mtk_aosp.c:3863
#4 0xf7696436 in thread_start_wrapper (arg=0xf5a179a0) at ubuntu/platform-api/android/hybris/ubuntu_application_gps_for_hybris.cpp:155
#5 0xf7413490 in start_thread (arg=0x0) at pthread_create.c:335
#6 0xf72d0c4c in ?? () at ../sysdeps/unix/sysv/linux/arm/clone.S:89 from /lib/arm-linux-gnueabihf/libc.so.6

The crash happens when trying to call gnss_sv_status_cb(), which appears in the definition of GpsCallbacks in the device gps.h, but not in the AOSP one.

Hmm, in fact it looks more like the whole GpsCallbacks structure contains garbage, so it is probably an initialization issue.

@Alfonso: Thanks a lot for the backtrace, I think the underlying issue is a race on initialization, see frame #6: start thread is presented with a null pointer. With that, I think we are seeing a race on boot and whenever the gps first receives an NMEA sequence, trying to hand it to upper layers of the stack, things go south with a segfault being the ultimate consequence.

Setting to critical because it makes location unusable on the device with a trivial case:
Start google map or HERE maps and accept the trust prompt when you request a location for the first time, then the service crashes.

I have flashed image 3 from Stable and location gets a fix almost instantly so this is definitely a regression over the current stable image.

On flashing RC 11 I see the crash file everyone is seeing.

Attached full backtrace and strace until the service crashed. This is with lp:~thomas-voss/platform-api/retry-loading-of-gps-hal applied (with a modification to increase the number of retries).

For krillin & vegetahd, landed in:

http://system-image.ubuntu.com/ubuntu-touch/rc/bq-aquaris.en/vegetahd/version-37.json
http://system-image.ubuntu.com/ubuntu-touch/rc/bq-aquaris.en/krillin/version-57.json

and frieza & cooler:

http://system-image.ubuntu.com/ubuntu-touch/rc/bq-aquaris-pd.en/frieza/version-14.json
http://system-image.ubuntu.com/ubuntu-touch/rc/bq-aquaris-pd.en/cooler/version-10.json

(and also recent rc-proposed)

Seems to be working fine in OTA11.

Well done!