** Attachment added: "On AC, result of tlp-stat"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1189645/+attachment/3735759/+files/tlp-stat.2013.07.13
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>From the horses mouth: "TLP is a power management tool for Linux. It brings
>you the benefits of advanced power management without the need to understand
>every technical detail.
TLP does not replace but enhance the existing power management of your
Linux installation. TLP applies it's settings
It would be fascinating if you could dig a little into how TLP (what's
the actual package called?) works. Being able to identify this in future
would help me to help others.
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Ok, I think I am getting closer. I had TLP installed to handle power
managment on the laptop. As part of my testing I purged that and the
problem went away. Reinstalled TLP and the problem came back.
So it has something to do with how TLP is configuring power management
...
** Also affects: tlp (
Not so "bad", just less than ideal. Though since that hw doesn't support
runtime suspend, there isn't anything that can be done. It is certainly
not the cause of the spontaneous slowdown. (At least that what's I
think, a mere driver author!)
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Do all the "Bad" things in this screen mean anything?
** Attachment added: "PowerTop tunables"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1189645/+attachment/3729842/+files/PowerTop2013-07-08.png
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Nothing showing up in hardware testing either.
Question. How to identify the cause of the problem being able to survive
a reboot but not a shutdown?
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Thanks a lot for all your help Chris!
I'm testing all the hw on the machine to see if I can find out more. So
far memtest86+, smart, & cpuburn have not turned up anything ...
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To clarify, you experience the issue with kernels as far back as 3.4.50?
If you can install a 3.2 that would be good to check.
Indeed that it does not present itself in any logs or as an obvious
effect, is very worrying. If nothing in the kernel/userspace claims
responsibility, then we have to loo
Yeah, I've tried a bunch of kernels:
3.4.50-030450-generic
3.6.11-030611-generic
3.8.0-25-generic
3.8.0-25-lowlatency
3.8.13-03081302-generic
3.10.0-031000rc7-generic
3.10.0-994-generic
I'm sure there was a 3.5. something as well, but I don'
Try with an older kernel, say v3.5. If it turns out to be a difference
in kernels, try to find the last known good (and the first known bad)
and begin a bisect. The results will be most illuminating.
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No changes. The problem remains. I can't find anything in the logs
indicating where the issue might be.
I tried a mainline kernel from http://kernel.ubuntu.com/~kernel-
ppa/mainline/drm-intel-next/current/
~$ uname -r
3.10.0-994-generic
No change. Problem remains.
Tried starting
I fixed the cpufreq issue on this laptop. It was exaggerating the issue,
but the problem remains.
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Title:
General lag un
Found something interesting using cpufreq-info, cpu frequency gets stuck
at lowest level.
On a fresh start:
available frequency steps: 1.20 GHz, 800 MHz
current policy: frequency should be within 800 MHz and 1.20 GHz.
After triggering the issue:
available frequency steps: 1.20 GHz, 800 M
Bug #1174169 shows that others have run into the same thing. They
mention that battery/AC has something to do with it. My laptop battery
is completely dead, all my issues have occurred on AC, though with the
dead battery still installed.
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Triggered by opening a PDF form in Evince.
** Attachment added: "power/latency top"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1189645/+attachment/3726407/+files/Screenshot%20from%202013-07-05%2017%3A53%3A02.png
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I'e already run intel_gpu_top and it did not go nuts when triggering the
issue, it never went over ~25% then went right back down even though the
system was still lagging like crazy.
Let's see what powertop & latencytop show ...
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So far I think we've established that it is not a rouge CPU hog that is
blocking the system. Having to restart the system rather the session,
also lends credence to that it is not a simple userspace or even gfx
driver issue.
On the theory that the GPU goes nuts, download and build
http://cgit.fre
Chris, does it help knowing that it takes a complete shutdown and
eventual restart to clear the issue? Neither a restart or a simple
session logoff/logon helps.
I'm still not seeing anything unusual in the log files, top or perf top,
but it's likely I'm not looking in the right spot ..
** Attac
The NMI error is a bug in that kernel's perf (iirc). I still haven't
seen anything to suggest a reason for any slowdown. Must be as
infuriating for you as it is for me.
Can you please watch top and sudo perf top whilst the system is idle and
lightly loaded to learn the expected behaviour, then ins
** Attachment added: "perf top -U"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1189645/+attachment/3725137/+files/PerfTop-U.after.png
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This appeared in syslog. Does it mean anything?
Jul 4 16:26:09 loronegro kernel: [12868.528514] Uhhuh. NMI received for
unknown reason 30 on CPU 0.
Jul 4 16:26:09 loronegro kernel: [12868.528525] Do you have a strange power
saving mode enabled?
Jul 4 16:26:09 loronegro kernel: [12868.528530]
Hmm, perf top -U ?
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Title:
General lag under desktop environments
To manage notifications about this bug go to:
https:
** Attachment added: "perf top --sort=dso"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1189645/+attachment/3725081/+files/Screenshot%20from%202013-07-04%2016%3A51%3A06.png
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Hmm, perf is taking up quite a bit of time to unwind stuff, more that I would
expect. But other than libc (likely memcpy/memmove, perhaps apt-get install
libc6-dbg and check), the only danger sign is the presence of acpi_os_write.
Can you also look at sudo perf top --sort=dso (and install the db
** Attachment added: "perf top"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1189645/+attachment/3724327/+files/2013-07-04%2007.55.26.jpg
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Look's that way, doesn't it :-)
I'll retest a bit later, about to head out for the evening ...
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Title:
General lag und
So the update-apt-index process is running? (just a quick glance at a
normal top) Can you wait until the system is idle (may be upto 5 minutes
on some systems) and remeasure?
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** Attachment added: "Screen showing "free" & "sudo perf top""
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1189645/+attachment/3723702/+files/2013-07-03%2016.27.03.jpg
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Reproducing the issue is somewhat random, so no, there is not a single
website that consistently has triggered the problem, at least not since
I purged Adobe Flash.
If I have some time later today, I'll re-install flash and the packages
you suggest and see if I can reproduce the issue simply.
I h
That rules out the obvious causes such as GPU hangs. Is that
reproduction script as simple as you can make it? i.e. does just loading
firefox and browsing a single website enough to bring the system to its
knees, or just totem etc?
Can you please 'apt-get install linux-tools xserver-xorg-core-dbg
Perhaps unrelated, but I did find a couple of people having similiar
issues:
http://ubuntuforums.org/showthread.php?t=2147319
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1188874
Though their workarounds did not do anything for me.
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** Attachment added: "Xorg log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1189645/+attachment/3723030/+files/Xorg.0.log
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** Attachment added: "dmesg log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1189645/+attachment/3723029/+files/dmesg
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Ok, triggered issue running Lubuntu.
Ran GtkPerf on a freash startup with no other apps running. Started
Firefox, browsed news sites (guardian, bbc). Started Totem, played local
video. Started Evince, opened local PDF form which triggered the issue.
Vidoe slows down and gets out of sync with audi
Let's start off with the basics: Xorg.0.log, dmesg and a system profile
of what is happening when it is slow. And narrow down the complaint, for
instance are the measurements you made in parallel with other system
activity or after you shut them down?
Also please do try running these tests with a
** Also affects: xserver-xorg-video-intel (Ubuntu)
Importance: Undecided
Status: New
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Title:
General lag under
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