Public bug reported:
I recently upgraded from Kubuntu 15.04 to Kubuntu 15.10 and I've noticed
this failure: when going through the graphical K Menu > Logout > Sleep
or K Menu > Logout > Hibernate, the computer seems to do the
corresponding operation fine, but some seconds later the computer powers
on by itself, undoing the previous order to sleep or hibernate. A sample
of the corresponding log messages stored in the file /var/log/syslog is
this:
Oct 25 18:47:16 hostname NetworkManager[663]: sleep requested
(sleeping: no enabled: yes)
Oct 25 18:47:16 hostname NetworkManager[663]: sleeping...
Oct 25 18:47:16 hostname NetworkManager[663]: NetworkManager state is
now ASLEEP
Oct 25 18:47:16 hostname whoopsie[653]: [18:47:16] offline
Oct 25 18:47:17 hostname systemd[1]: Reached target Sleep.
Oct 25 18:47:17 hostname systemd[1]: Starting Suspend...
Oct 25 18:47:18 hostname systemd-sleep[4848]: Suspending system...
Oct 25 18:47:21 hostname kernel: [13031.018587] PM: Syncing filesystems ...
done.
Oct 25 18:47:21 hostname kernel: [13031.280695] PM: Preparing system for sleep
(mem)
Oct 25 18:47:21 hostname kernel: [13031.281033] Freezing user space processes
... (elapsed 0.075 seconds) done.
Oct 25 18:47:21 hostname kernel: [13031.357037] Freezing remaining freezable
tasks ... (elapsed 0.001 seconds) done.
Oct 25 18:47:21 hostname kernel: [13031.358480] PM: Suspending system (mem)
Oct 25 18:47:21 hostname kernel: [13031.358604] Suspending console(s) (use
no_console_suspend to debug)
Oct 25 18:47:21 hostname kernel: [13031.359627] sd 3:0:0:0: [sda] Synchronizing
SCSI cache
Oct 25 18:47:21 hostname kernel: [13031.368742] serial 00:05: disabled
Oct 25 18:47:21 hostname kernel: [13031.368751] serial 00:05: System wakeup
disabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.368785] i8042 aux 00:04: System wakeup
disabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.368858] parport_hostname 00:03: disabled
Oct 25 18:47:21 hostname kernel: [13031.493405] sd 3:0:0:0: [sda] Stopping disk
Oct 25 18:47:21 hostname kernel: [13031.880050] PM: suspend of devices complete
after 521.067 msecs
Oct 25 18:47:21 hostname kernel: [13031.896046] PM: late suspend of devices
complete after 15.988 msecs
Oct 25 18:47:21 hostname kernel: [13031.896488] pcieport :00:1c.1: System
wakeup enabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.896660] ehci-pci :00:1d.7: System
wakeup enabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.896690] uhci_hcd :00:1d.3: System
wakeup enabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.896723] uhci_hcd :00:1d.2: System
wakeup enabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.896747] uhci_hcd :00:1d.1: System
wakeup enabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.896776] uhci_hcd :00:1d.0: System
wakeup enabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.912105] PM: noirq suspend of devices
complete after 16.053 msecs
Oct 25 18:47:21 hostname kernel: [13031.912287] ACPI: Preparing to enter system
sleep state S3
Oct 25 18:47:21 hostname kernel: [13031.935217] PM: Saving platform NVS memory
Oct 25 18:47:21 hostname kernel: [13031.936928] Disabling non-boot CPUs ...
Oct 25 18:47:21 hostname kernel: [13031.938236] smpboot: CPU 1 is now offline
Oct 25 18:47:21 hostname kernel: [13031.952279] ACPI: Low-level resume complete
Oct 25 18:47:21 hostname kernel: [13031.952279] PM: Restoring platform NVS
memory
Oct 25 18:47:21 hostname kernel: [13031.952279] microcode: CPU0 microcode
updated early to revision 0xa4, date = 2010-10-02
Oct 25 18:47:21 hostname kernel: [13031.952279] Enabling non-boot CPUs ...
Oct 25 18:47:21 hostname kernel: [13031.952279] x86: Booting SMP configuration:
Oct 25 18:47:21 hostname kernel: [13031.952279] smpboot: Booting Node 0
Processor 1 APIC 0x1
Oct 25 18:47:21 hostname kernel: [13031.938225] microcode: CPU1 microcode
updated early to revision 0xa4, date = 2010-10-02
Oct 25 18:47:21 hostname kernel: [13031.964405] cache: parent cpu1 should not
be sleeping
Oct 25 18:47:21 hostname kernel: [13031.964682] CPU1 is up
Oct 25 18:47:21 hostname kernel: [13031.966074] ACPI: Waking up from system
sleep state S3
Oct 25 18:47:21 hostname kernel: [13031.966634] uhci_hcd :00:1d.0: System
wakeup disabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.966700] uhci_hcd :00:1d.1: System
wakeup disabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.966723] uhci_hcd :00:1d.2: System
wakeup disabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.966755] uhci_hcd :00:1d.3: System
wakeup disabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.980264] ehci-pci :00:1d.7: System
wakeup disabled by ACPI
Oct 25 18:47:21 hostname kernel: [13031.980391] PM: noirq resume of devices
complete after 14.090 msecs
Oct 25 18:47:21 hostname kernel: [13031.980742] PM: early resume of devices
complete after 0.326 msecs
Oct 25 18:47:21 hostname kernel: [13031.988081] usb usb2: root hub lost power
or was
