Comparing the commit log for driver/acpi changes between 3.17 and
3.18-rc1, I notice this commit standing out as the most likely related
commit:
commit 9faf6136ff4647452580b019f4b16f8c5082e589
Author: Matthew Garrett
Date: Sat Sep 20 13:19:46 2014 +0200
ACPI / SBS: Disable smart battery ma
v3.16.7-ck16-utopic and v3.17.8-vivid do not contain the issue.
v3.18-rc1-utopic contains the issue.
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Title:
15.10 20150826 snapshot -- MacBook
The issue persists with the current 4.2 build.
** Tags added: kernel-bug-exists-upstream
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Title:
15.10 20150826 snapshot -- MacBookPro3,1 has hi
Will do.
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Title:
15.10 20150826 snapshot -- MacBookPro3,1 has high load (and
temperature) despite low CPU and low IO
To manage notifications a
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.2 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix th
** Changed in: linux (Ubuntu)
Importance: Undecided => Low
** Changed in: linux (Ubuntu)
Importance: Low => Undecided
** Changed in: linux (Ubuntu)
Importance: Undecided => High
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I don't see this issue on the 12.04.5 Live CD (3.13.0-32-generic kernel)
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Title:
15.10 20150826 snapshot -- MacBookPro3,1 has high load (and
te
However, now on other attempts, I am seeing that processor.max_cstate=0
does not always eliminate the issue as I saw in the previous comment.
Puzzling.
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Upon trying it again, I'm actually seeing the load drop down in the
"steady gpe17 after boot" case. I just didn't wait long enough for the
boot load spike to get out of the average. Please disregard that second
half of my previous comment.
Here are some more experiments:
With processor.max_csta
On one particular boot with the external power connected, there were
only 1176 interrupts for this event a few minutes after boot. It was
stable at 1176. Upon disconnecting external power, it started its rapid
cycling. Reconnecting the external power source did not solve the
problem.
On another
** Attachment added: "dmidecode.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1489622/+attachment/4453568/+files/dmidecode.txt
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Tit
** Attachment added: "acpidump.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1489622/+attachment/4453569/+files/acpidump.txt
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Title
Although even with gpe17, I'm still seeing the load average around 1.25
with perf reporting a lot of time in acpi_processor_ffh_cstate_enter
- 43.32%43.32% swapper [kernel.kallsyms] [k]
acpi_processor_ffh_cstate_enter
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I wonder if it is ACPI related:
$ uptime && cat /sys/firmware/acpi/interrupts/gpe17
16:22:48 up 0 min, 1 user, load average: 2.26, 0.74, 0.26
376509 enabled
that's a lot of interrupts for a system that has been up less than a
minute.
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