I don't know if this is related (or another bug): I can reproduce 100% on OTA-10 with the app SensorStatus, that the app opens successful the GPS service, issues some ioctls and without getting or waiting for a first fix, it just closes again the GPS, all this within 2 secs:
$ tail -f /var/log/syslog | fgrep GPS Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.400623] (2)[1213:mtk_wmtd][WMT-CTRL][I]wmt_ctrl_gps_sync_set:ctrl GPS_SYNC(4) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.400669] (2)[1213:mtk_wmtd][WMT-FUNC][I]wmt_func_gps_pre_ctrl:ctrl GPS_SYNC_SET(0) ok Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.401061] (1)[1213:mtk_wmtd][WMT-FUNC][I]wmt_func_gps_pre_ctrl:set reg for GPS_SYNC function okay by chip ic_pin_ctrl Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.401191] (1)[1213:mtk_wmtd][WMT-CTRL][I]wmt_ctrl_gps_lna_set:ctrl GPS_LNA(2) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.403702] (3)[1074:mnld][GPS] [I]GPS_open: WMT turn on GPS OK! Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.403753] (3)[1074:mnld][GPS] [I]GPS_compat_ioctl: (8) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.403769] (3)[1074:mnld][GPS] [I]GPS_unlocked_ioctl: GPS co_clock_flag (0) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.404403] (3)[1074:mnld][GPS] [I]GPS_compat_ioctl: (7) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.404419] (3)[1074:mnld][GPS] [I]GPS_unlocked_ioctl: low power flag (0) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.406411] (1)[8506:mnld][GPS] [I]GPS_compat_ioctl: (21505) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.406429] (1)[8506:mnld][GPS] [I]GPS_unlocked_ioctl: unknown cmd (21505) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.406445] (1)[8506:mnld][GPS] [I]GPS_compat_ioctl: (21506) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.406459] (1)[8506:mnld][GPS] [I]GPS_unlocked_ioctl: unknown cmd (21506) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.406474] (1)[8506:mnld][GPS] [I]GPS_compat_ioctl: (21515) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.406487] (1)[8506:mnld][GPS] [I]GPS_unlocked_ioctl: unknown cmd (21515) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.407859] (1)[8506:mnld][GPS] [I]GPS_compat_ioctl: (21505) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.407880] (1)[8506:mnld][GPS] [I]GPS_unlocked_ioctl: unknown cmd (21505) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.407896] (1)[8506:mnld][GPS] [I]GPS_compat_ioctl: (21506) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.407910] (1)[8506:mnld][GPS] [I]GPS_unlocked_ioctl: unknown cmd (21506) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.407925] (1)[8506:mnld][GPS] [I]GPS_compat_ioctl: (21515) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.407938] (1)[8506:mnld][GPS] [I]GPS_unlocked_ioctl: unknown cmd (21515) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.418189] (1)[8506:mnld][GPS] [I]GPS_compat_ioctl: (21505) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.418211] (1)[8506:mnld][GPS] [I]GPS_unlocked_ioctl: unknown cmd (21505) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.418228] (1)[8506:mnld][GPS] [I]GPS_compat_ioctl: (21506) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.418264] (1)[8506:mnld][GPS] [I]GPS_unlocked_ioctl: unknown cmd (21506) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.418281] (1)[8506:mnld][GPS] [I]GPS_compat_ioctl: (21515) Apr 8 08:48:48 ubuntu-phablet kernel: [ 668.418294] (1)[8506:mnld][GPS] [I]GPS_unlocked_ioctl: unknown cmd (21515) Apr 8 08:48:50 ubuntu-phablet kernel: [ 669.680710] (1)[1213:mtk_wmtd][WMT-CTRL][I]wmt_ctrl_gps_sync_set:ctrl GPS_SYNC(7) Apr 8 08:48:50 ubuntu-phablet kernel: [ 669.680741] (1)[1213:mtk_wmtd][WMT-FUNC][I]wmt_func_gps_pre_ctrl:ctrl GPS_SYNC_SET(1) ok Apr 8 08:48:50 ubuntu-phablet kernel: [ 669.681611] (1)[1213:mtk_wmtd][WMT-FUNC][I]wmt_func_gps_pre_ctrl:set reg for GPS_SYNC function okay by chip ic_pin_ctrl Apr 8 08:48:50 ubuntu-phablet kernel: [ 669.681671] (1)[1213:mtk_wmtd][WMT-CTRL][I]wmt_ctrl_gps_lna_set:ctrl GPS_LNA(7) Apr 8 08:48:50 ubuntu-phablet kernel: [ 669.683691] (1)[1074:mnld][GPS] [I]GPS_close: WMT turn off GPS OK! Apr 8 08:48:50 ubuntu-phablet kernel: [ 669.654292] (1)[1964:tx_thread][GPS] [I]GPS_read: signaled by -ERESTARTSYS(-512) -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to location-service in Ubuntu. https://bugs.launchpad.net/bugs/1565469 Title: GPS Denied without reason To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1565469/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
