[Sprint LG G3] fergie716:
So I've been digging around on my Blue Screen reboots, I don't know the answer to them but it may have something to do with GPS and/or my cell signal switching.

Here is the tail end of my last_kmsg

[29991.855779 / 01-06 18:51:21.742] SMSM: Modem SMSM state changed to SMSM_RESET.
[29991.855977 / 01-06 18:51:21.742] Fatal error on the modem.
[29991.856060 / 01-06 18:51:21.742] modem subsystem failure reason: FW@fw_rf_ccs.cc:617 Assertion (fw_rf_ccs_tq_is_idle(tq)) failed.
[29991.856116 / 01-06 18:51:21.742] subsys-restart: subsystem_restart_dev(): Restart sequence requested for modem, restart_level = SYSTEM.
[29991.856176 / 01-06 18:51:21.742] Kernel panic - not syncing: subsys-restart: Resetting the SoC - modem crashed.
[29991.856291 / 01-06 18:51:21.742] [<c010bd9c>] (unwind_backtrace+0x0/0x11c) from [<c09cf718>] (panic+0x8c/0x1e8)
[29991.856380 / 01-06 18:51:21.742] [<c09cf718>] (panic+0x8c/0x1e8) from [<c0164a3c>] (subsystem_restart_dev+0xe0/0x120)
[29991.856462 / 01-06 18:51:21.742] [<c0164a3c>] (subsystem_restart_dev+0xe0/0x120) from [<c09cf160>] (restart_modem+0x94/0xc0)
[29991.856558 / 01-06 18:51:21.742] [<c09cf160>] (restart_modem+0x94/0xc0) from [<c013538c>] (modem_err_fatal_intr_handler+0x70/0x88)
[29991.856655 / 01-06 18:51:21.742] [<c013538c>] (modem_err_fatal_intr_handler+0x70/0x88) from [<c01ef270>] (handle_irq_event_percpu+0xbc/0x2a4)
[29991.856741 / 01-06 18:51:21.742] [<c01ef270>] (handle_irq_event_percpu+0xbc/0x2a4) from [<c01ef494>] (handle_irq_event+0x3c/0x5c)
[29991.856823 / 01-06 18:51:21.742] [<c01ef494>] (handle_irq_event+0x3c/0x5c) from [<c01f1b9c>] (handle_level_irq+0xe0/0xfc)
[29991.856904 / 01-06 18:51:21.742] [<c01f1b9c>] (handle_level_irq+0xe0/0xfc) from [<c01eec18>] (generic_handle_irq+0x20/0x30)
[29991.856983 / 01-06 18:51:21.742] [<c01eec18>] (generic_handle_irq+0x20/0x30) from [<c012c4e0>] (smp2p_gpio_in_notify+0x218/0x284)
[29991.857066 / 01-06 18:51:21.742] [<c012c4e0>] (smp2p_gpio_in_notify+0x218/0x284) from [<c01ba904>] (notifier_call_chain+0x40/0x68)
[29991.857143 / 01-06 18:51:21.742] [<c01ba904>] (notifier_call_chain+0x40/0x68) from [<c01bab98>] (raw_notifier_call_chain+0x14/0x1c)
[29991.857222 / 01-06 18:51:21.742] [<c01bab98>] (raw_notifier_call_chain+0x14/0x1c) from [<c012af04>] (smp2p_interrupt_handler+0x288/0x390)
[29991.857303 / 01-06 18:51:21.742] [<c012af04>] (smp2p_interrupt_handler+0x288/0x390) from [<c01ef270>] (handle_irq_event_percpu+0xbc/0x2a4)
[29991.857384 / 01-06 18:51:21.742] [<c01ef270>] (handle_irq_event_percpu+0xbc/0x2a4) from [<c01ef494>] (handle_irq_event+0x3c/0x5c)
[29991.857465 / 01-06 18:51:21.742] [<c01ef494>] (handle_irq_event+0x3c/0x5c) from [<c01f1c90>] (handle_fasteoi_irq+0xd8/0x124)
[29991.857545 / 01-06 18:51:21.742] [<c01f1c90>] (handle_fasteoi_irq+0xd8/0x124) from [<c01eec18>] (generic_handle_irq+0x20/0x30)
[29991.857630 / 01-06 18:51:21.742] [<c01eec18>] (generic_handle_irq+0x20/0x30) from [<c0106b48>] (handle_IRQ+0x80/0xb8)
[29991.857704 / 01-06 18:51:21.742] [<c0106b48>] (handle_IRQ+0x80/0xb8) from [<c01004dc>] (gic_handle_irq+0x94/0x110)
[29991.857776 / 01-06 18:51:21.742] [<c01004dc>] (gic_handle_irq+0x94/0x110) from [<c0105e80>] (__irq_svc+0x40/0x70)
[29991.857827 / 01-06 18:51:21.742] Exception stack(0xc100fee8 to 0xc100ff30)
[29991.857879 / 01-06 18:51:21.742] fee0: c100ff30 00000000 0000051e 00000000 0013ffa1 00000000
[29991.857938 / 01-06 18:51:21.742] ff00: 8d4fdf3b 83126e97 cf360758 00000003 c103bc10 00000000 00007527 c100ff30
[29991.857988 / 01-06 18:51:21.742] ff20: c01d2d3c c017b7b4 00000013 ffffffff
[29991.858067 / 01-06 18:51:21.742] [<c0105e80>] (__irq_svc+0x40/0x70) from [<c017b7b4>] (lpm_cpuidle_enter+0xfc/0x114)
[29991.858163 / 01-06 18:51:21.742] [<c017b7b4>] (lpm_cpuidle_enter+0xfc/0x114) from [<c06bea14>] (cpuidle_enter+0x14/0x18)
[29991.858251 / 01-06 18:51:21.742] [<c06bea14>] (cpuidle_enter+0x14/0x18) from [<c06bec00>] (cpuidle_enter_state+0x14/0x5c)
[29991.858328 / 01-06 18:51:21.742] [<c06bec00>] (cpuidle_enter_state+0x14/0x5c) from [<c06bee08>] (cpuidle_idle_call+0x1c0/0x324)
[29991.858405 / 01-06 18:51:21.742] [<c06bee08>] (cpuidle_idle_call+0x1c0/0x324) from [<c010701c>] (cpu_idle+0x60/0xec)
[29991.858483 / 01-06 18:51:21.742] [<c010701c>] (cpu_idle+0x60/0xec) from [<c099aac8>] (rest_init+0x88/0xa4)
[29991.858561 / 01-06 18:51:21.742] [<c099aac8>] (rest_init+0x88/0xa4) from [<c0f009e4>] (start_kernel+0x2e4/0x33c)
[29991.858867 / 01-06 18:51:21.742] Rebooting in 5 seconds..
[29996.861258 / 01-06 18:51:21.742] Going down for restart now
[29996.862383 / 01-06 18:51:21.742] Calling SCM to disable SPMI PMIC arbiter
No errors detected
UTS_VERSION

This thread here from the Moto Photon Q discusses possibilities for this here

Also, from what I have read, these crashes happen (or may happen) on stock based ROMs but the device doesn't restart into the blue screen.

Gonna keep diggin

EDIT: Also, I'm curious if anyone who still has the ZV4 Modem has had any of these crashes. I upgraded to ZV6 a few weeks back