I'm still having this problem after updating to 14.10.
This issue exclusively arises if I suspend my laptop when connected to
the power cord, then unplug it during suspend and wake it up on battery.
It does not happen every time, maybe once in seven times.
The scaling_governor keeps all cores at
Jere, as this bug report is closed, this bug report is not scoped to you, your
hardware, or your problem. So your hardware and problem may be tracked, could
you please file a new report with Ubuntu by executing the following in a
terminal while booted into the default Ubuntu kernel (not a
I cannot reproduce the problem with trusty, therefore I am going to
close this bug...
** Changed in: linux (Ubuntu)
Status: Incomplete = Fix Released
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Since I reported the problem I changed this power adapter and did not
see the problem again. Do you use a non-Dell or non-compatible Dell
power adapter ?
I've always been using the standard Dell power adapter that came with
the laptop. The last time it happened, the laptop was running from
Allan Crooks, thank you for your comment. So your hardware and problem may be
tracked, could you please file a new report with Ubuntu by executing the
following in a terminal while booted into a Ubuntu repository kernel (not a
mainline one) via:
ubuntu-bug linux
For more on this, please read
The slowdown doesn't always happen, but it does appear to happen after
sometimes resuming from standby.
In my case I suspect that the problem might be caused by a non-
compatible power adapter (I am using several ones). Since I reported
the problem I changed this power adapter and did not see
Could you please confirm this issue exists with the latest development
release of Ubuntu?
I am using this system as my main computing platform and therefore I
cannot do tests that span several days.
It will allow additional upstream developers to examine the issue.
Unfortunately my kernel is
Having this problem as well with my Dell Latitude E7440 - switching to
performance seemed to help as well (thanks Laurent!)
The slowdown doesn't always happen, but it does appear to happen after
sometimes resuming from standby. I've not known whether to blame it on
the DE I was using (Cinnamon)
Since my initial report I updated the BIOS of this laptop:
$ sudo dmidecode -s bios-version sudo dmidecode -s bios-release-date
A19
11/14/2013
and today (after 8 days of uptime and perhaps 20 suspend/resume cycles)
the bug reappeared:
# /usr/lib/checkbox/bin/frequency_governors_test
I changed the bug description to state the difficulty of reproducing
this bug.
** Description changed:
- After a suspend/resume using the ondemand governor the system is very slow to
answer some inputs. The text output pauses for several seconds while I am
typing this text. Trying to scroll a
Laurent Bonnaud, thank you for updating your BIOS. Could you please
confirm this issue exists with the latest development release of Ubuntu?
ISO images are available from http://cdimage.ubuntu.com/daily-
live/current/ . If the issue remains, please just make a comment to
this.
If reproducible,
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