** 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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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
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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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
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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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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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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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
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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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
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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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
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
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 ..
**
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
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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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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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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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
I fixed the cpufreq issue on this laptop. It was exaggerating the issue,
but the problem remains.
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https://bugs.launchpad.net/bugs/1189645
Title:
General lag under desktop environments
** 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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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
** 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 top -U ?
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Title:
General lag under desktop environments
To manage notifications about this bug go to:
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]
** 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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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
** Attachment added: Xorg log
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1189645/+attachment/3723030/+files/Xorg.0.log
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Title:
** Attachment added: dmesg log
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1189645/+attachment/3723029/+files/dmesg
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Title:
General
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
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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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
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
** 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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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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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 under desktop environments
I ran GtkPerf before and after triggering the problem.
Just after starting the computer running
~$ gtkperf -a
Total time: 10.78
After triggering the issue by playing a movie via Totem, the system bogs
down and gtkperf -a gives a result of:
Total time: 96.63
The attached text
Looks like a UXA versus SNA problem.
https://wiki.ubuntu.com/X/Testing/IntelSNA
~$ grep SNA init /var/log/Xorg.0.log
[47.176] (II) intel(0): SNA initialized with gen3 backend
The default is SNA, which is fast, until something goes wrong, then it
gets really slow.
If I start with UXA, it
** Also affects: xserver-xorg-video-intel
Importance: Undecided
Status: New
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Title:
General lag under desktop environments
To manage
** Tags added: xserver-xorg-video-intel
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Title:
General lag under desktop environments
To manage notifications about this bug go to:
** Also affects: xserver-xorg-video-intel (Ubuntu)
Importance: Undecided
Status: New
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Title:
General lag under desktop environments
The issue just got triggered by viewing several pdf forms in evince, so
it's not just being triggered by flash videos.
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Title:
General lag under
** Description changed:
A while after logging on, the system gets really slow. Menus and window
movements take a while to respond, switching windows is slow, etc.
This is a regression, it was not like this using Ubuntu 12.10, it just
started on 13.04. Tried different desktops (Unity,
Tried a couple of other kernels, but the problem remains.
3.4.50-030450-generic
3.8.0-25-lowlatency
So it looks like the issue has been there all along, but was not being
triggered previous to Raring.
For now, I just purged the adobe Flash plugin as it does not really
provide critical
I can now trigger the problem viewing online video using the current
flashplugin 11.2.202.291-0raring1
kernel versions which I have tried the last day or so and which have
the problem:
3.6.11-030611-generic
3.8.0-25-generic
3.8.13-03081302-generic
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The latest kernel from saucy still has the problem.
3.10.0-031000rc7-generic
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Title:
General lag under desktop environments
To manage
So this issue does happen with the 3.8.13 kernel eventually, as well as
the 3.9 and 3.10 kernels? If so, we can perform a bisect to identify
the commit that introduced this in Raring.
** Also affects: linux (Ubuntu Raring)
Importance: Undecided
Status: New
** Also affects: linux
The flashplugin was recently updated and I can't reproduce the issue.
Where can i get the previous version of Flash?
Regardless, a buggy flash plugin should not, I think, affect the whole
system. When the issue occured, a complete shutdown was needed to
restore sanity. A simple restart did not
I seem to have hit the bug again using kernel 3.8.13.2. The web site
which triggered it is
http://www.theglobeandmail.com/news/news-video/understanding-rob-fords-
relationship-with-to-police/article12559196/
** Tags removed: kernel-da-key kernel-fixed-upstream
** Tags added:
The issue remains with other mainline kernels, both 3.8.0-23-generic and
3.9 rc8.
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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I've now tried 2 mainline kernels.
3.8.13-03081302-generic (v3.8.13.2-raring) dated 07-Jun-2013 is working
well so far, no issues.
3.9 rc8 dated 21-Apr-2013 is problematic.
** Tags added: kernel-fixed-upstream
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Also tried 3.10 rc5. That version also has issues.
The version which seems to be working ok is 3.8.13.
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Title:
General lag under desktop
Would it be possible for you to test the latest upstream stable kernel?
Please test the latest v3.8 stable 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 this bug, please add the tag:
I am now noticing that the 3.9 rc8 kernel does eventually display the
same problem, it just takes a lot longer.
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Title:
General lag under
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