Device enters a suspend/exit suspend loop

[Jean-Baptiste Lallement]

= System Info =
current build number: 106
device name: mako
channel: ubuntu-touch/devel-proposed
alias: ubuntu-touch/utopic-proposed
last update: 2014-07-01 08:43:24
version version: 106
version ubuntu: 20140701
version device: 20140625

The conditions to reproduce this bug are not clear, but it seems that the device must be suspended then move away from the access point. I never noticed it when I'm home for example.

The consequence is that the logs are spammed with suspend/exit suspend messages and filing very quickly.

Excerpt of kern.log (full log attached):
Jul 1 08:47:07 ubuntu-phablet kernel: [ 213.777872] PM: Syncing filesystems...
Jul 1 08:47:07 ubuntu-phablet kernel: [ 213.781626] suspend: enter suspend
Jul 1 08:47:07 ubuntu-phablet kernel: [ 213.781687] PM: suspend entry 2014-07-01 06:47:07.318526184 UTC
Jul 1 08:47:08 ubuntu-phablet kernel: [ 213.844773] Freezing user space processes ... (elapsed 0.002 seconds) done.
Jul 1 08:47:08 ubuntu-phablet kernel: [ 213.853135] sync done.
Jul 1 08:47:08 ubuntu-phablet kernel: [ 213.853135] PM: Syncing filesystems...
Jul 1 08:47:08 ubuntu-phablet kernel: [ 213.854265] sync done.
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.095528] Freezing remaining freezable tasks ... (elapsed 0.002 seconds) done.
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.098489] Suspending console(s) (use no_console_suspend to debug)
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.110849] msm_fb_ext_suspend: Turning off HPD circuitry
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.149855] PM: suspend of devices complete after 47.641 msecs
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.151625] PM: late suspend of devices complete after 1.709 msecs
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.155501] power_suspend_late return 0
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.155562] PM: noirq suspend of devices complete after 3.876 msecs
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.155592] Disabling non-boot CPUs ...
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.156508] msm_pm_enter
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.156508] msm_pm_enter: power collapse
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.156508] msm_mpm_irqs_detectable: cannot monitor 000000,00000000,00000000,00000000,00000000,00000020,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.156508] msm_pm_enter: return
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.156508] Suspended for 0.000 seconds
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.159987] PM: noirq resume of devices complete after 2.868 msecs
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.162246] wakeup wake lock: msm_hsic_host
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.164199] PM: early resume of devices complete after 1.770 msecs
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.170914] msm_fb_ext_resume: Turning on HPD circuitry
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.177445] PM: resume of devices complete after 13.215 msecs
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.178574] Restarting tasks ... done.
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.208240] PM: suspend exit 2014-07-01 06:47:08.036135900 UTC
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.208270] suspend: exit suspend, ret = 0 (2014-07-01 06:47:08.036166420 UTC)
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.208270] active wake lock msm_hsic_host
Jul 1 08:47:08 ubuntu-phablet kernel: [ 214.208270] suspend: abort suspend