This bug seems to affect 15.10, without even using userspace. It
appears that only CPU1 is set to 'powersave' resuming from suspend.
---Before Suspend (on battery power)---
thejas@thejas-Aspire-E5-573:~$ cpufreq-info |egrep 'The governor'\|'current
CPU'
The governor "powersave" may decide which speed to use
current CPU frequency is 1.79 GHz.
The governor "powersave" may decide which speed to use
current CPU frequency is 923 MHz.
The governor "powersave" may decide which speed to use
current CPU frequency is 1.75 GHz.
The governor "powersave" may decide which speed to use
current CPU frequency is 1.80 GHz.
---After Suspend (on battery power)---
thejas@thejas-Aspire-E5-573:~$ cpufreq-info |egrep 'The governor'\|'current CPU'
The governor "powersave" may decide which speed to use
current CPU frequency is 1.99 GHz.
The governor "performance" may decide which speed to use
current CPU frequency is 2.00 GHz.
The governor "performance" may decide which speed to use
current CPU frequency is 2.00 GHz.
The governor "performance" may decide which speed to use
current CPU frequency is 1.99 GHz.
On a dual-boot laptop this bug causes Ubuntu battery backup time to be
worse than windows.
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https://bugs.launchpad.net/bugs/364514
Title:
cpu frequency is reset to maximum after resume from suspend if
governor is userspace
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