We need at least your syslog here to know what happens, because here I
believe that the system is just rebooting because something else
crashed.
In vivid we added an upstart watchdog that reboots the phone when a core
service crashes for a few times in a row (as we can't really guarantee
that the phone is in a proper shape), so this might be just a bad side
effect of another service crashing.
I added a new logic that at least disables this if you're using a rw
filesystem, as then you're entirely responsible for whatever
customization you may add, so this would only apply for ro fs.
** Changed in: canonical-devices-system-image
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1426272
Title:
vivid-proposed/krillin - Phone reboots spontaneously
Status in the base for Ubuntu mobile products:
Incomplete
Status in linux package in Ubuntu:
Triaged
Bug description:
current build number: 122
device name: krillin
channel: ubuntu-touch/devel-proposed
alias: ubuntu-touch/vivid-proposed
last update: 2015-02-25 15:06:29
version version: 122
version ubuntu: 20150225
version device: 20150210-95b6a9f
version custom: 20150225
It happened up to 3 times a day, the phone reboots with no apparent reason.
syslog doesn't work on the phone but /proc/last_kmsg shows the following
message:
[ 793.598710]systemd-logind[16120]: Failed to start user service: Unknown
unit: user@0.service
[ 793.606282]systemd-logind[16120]: Failed to start user service: Unknown
unit: user@32011.service
[ 806.517752]systemd-logind[16242]: Failed to start user service: Unknown
unit: user@0.service
[ 806.521333]systemd-logind[16242]: Failed to start user service: Unknown
unit: user@32011.service
[ 809.797251]Restarting system.
[ 809.797336][<c0015404>] (unwind_backtrace+0x0/0x104) from [<c07db344>]
(dump_stack+0x20/0x24)
[ 809.797366][<c0015404>] (unwind_backtrace+0x0/0x104) from [<c07db344>]
(dump_stack+0x20/0x24)
[ 809.797396][<c07db344>] (dump_stack+0x20/0x24) from [<c0014110>]
(handle_IPI+0xf4/0x250)
[ 809.797424][<c07db344>] (dump_stack+0x20/0x24) from [<c0014110>]
(handle_IPI+0xf4/0x250)
[ 809.797452][<c0014110>] (handle_IPI+0xf4/0x250) from [<c00085bc>]
hdo_IPI+0x18/0x1c)
[ 809.797477][<c0014110>] (handle_IPI+0xf4/0x250) from [<c00085bc>]
(do_IPI+0x18/0x1c)
[ 809.797502][<c00085bc>] (do_IPI+0x18/0x1c) from [<c07eb9f4>]
(__irq_svc+0x34/0xc8)
[ 809.797529][<c00085bc>] (do_IPI+0x18/0x1c) from [<c07eb9f4>]
(__irq_svc+0x34/0xc8)
[ 809.797686][<c07eb9f4>] (8e1fac dc+0x34/0xc8) from [<c000f178>] (78
20070013 ffffffff
[ 809.797718][<c07eb9f4>] (__irq_svc+0x34/0xc8) from [<c000f178>]
(default_idle+0x2c/0x40)
[ 809.797747][<c000f178>] (default_idle+0x2c/0x40) from
[<c000f5a0>defcpu_idle+0xb0/0x10c)
[ 809.797775][<c000f178>] (default_idle+0x2c/0x40) from [<c000f5a0>]
(cpu_idle+0xb0/0x10c)
[ 809.797804][<c000f5a0>] (cpu_idle+0xb0/0x10c) from [<c07d8448>]
(secondary_start_kernel+0x1cc/0x1e8)
[ 809.797834][<c000f5a0>] (cpu_idle+0xb0/0x10c) from [<c07d8448>]
(secondary_start_kernel+0x1cc/0x1e8)
[ 809.797863][<c07d8448>] (secondary_start_kernel+0x1cc/0x1e8)
fromsecondary_start0x807d7d8c)
[ 809.797889][<c07d8448>] (secondary_start_kernel+0x1cc/0x1e8) from
[<807d7d8c>] (0x807d7d8c)
[ 809.797915][<c07d8448>] (secondary_start_kernel+0x1cc/0x1e8) from
[<807d7d8c>] (0x807d7d8c)
[ 809.797964][<c07db344>] (dump_stack+0x20/0x24) from [<c0014110>]
(handle_IPI+0xf4/0x250)
[ 809.798009][<c0014110>] (handle_IPI+0xf4/0x250) from [<c00085bc>]
(do_IPI+0x18/0x1c)
[ 809.798056][<c00085bc>] (do_IPI+0x18/0x1c) from [<c07eb9f4>]
(__irq_svc+0x34/0xc8)
[ 809.798218][<c07eb9f4>] (__irq_svc+0x34/0xc8) from [<c000f178>]
(default_idle+0x2c/0x40)
[ 809.798269][<c000f178>] (default_idle+0x2c/0x40) from [<c000f5a0>]
(cpu_idle+0xb0/0x10c)
[ 809.798319][<c000f5a0>] (cpu_idle+0xb0/0x10c) from [<c07d8448>]
(secondary_start_kernel+0x1cc/0x1e8)
[ 809.798365][<c07d8448>] (secondary_start_kernel+0x1cc/0x1e8) from
[<807d7d8c>] (0x807d7d8c)
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