I could not trigger it using the upstream kernel for now
(4.3.0-040300rc1-generic).
But it's maybe noteworthy, that the governors of CPU 1-3 get changed from
"powersave" to "performance", regardless of using the Ubuntu or upstream kernel
(/sys/devices/system/cpu/cpu*/cpufreq/scaling_governor).
That might be related to /etc/init.d/ondemand somehow, from Ubuntu's sysvinit
package.
I am going to tag it as fixed upstream, but that's only from two tests,
and I have not found a reliable way to trigger this before already.
** Tags added: kernel-fixed-upstream
** Tags added: kernel-fixed-upstream-4.3-rc1
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1497520
Title:
Slow performance after resuming from/on battery (CPUs do not scale
above 800MHz)
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