High /usr/bin/X CPU Usage
Patrick Bégou
Patrick.Begou at hmg.inpg.fr
Tue Sep 6 01:58:20 PDT 2011
Check also the fans on your graphic board. Some years ago I had a
similar problem and the fan of my graphic board was not working.
When your computer is runing for a while, the temperature may increase
with a fan problem on the graphic board.
Patrick
Chris Robinson a écrit :
> Just an idea:
>
> Check the CPU temperatures. Some people have reported problems with
> ACPI fan control to point that it causes CPU overheating. The
> internal temperature sensor then reduces the clock speed to prevent
> damage. I've never heard of it causing this much trouble however -
> mostly lag when watching videos etc.
>
> Sorry I don't have any specifics, but it might be worth eliminating
> this as a potential problem before you go reading all that code ;-)
>
> Chris
>
> ------------------------------------------------------------------------
> *From:* Robert Massaioli <robertmassaioli at gmail.com>
> *To:* xorg at freedesktop.org
> *Sent:* Tuesday, 6 September 2011 10:46 AM
> *Subject:* High /usr/bin/X CPU Usage
>
> Hi XOrg Mailing List,
>
> In a nutshell: I am having issues with /usr/bin/X taking up way too
> much CPU and, when it does start to use more CPU, my entire user
> experience becomes quite laggy. I have tried really hard to solve the
> problem on my own but I was unable to find a solution so I have
> finally decided that it is time for me to ask this mailing list for
> help. That is the fundamental problem, the rest of this post deals
> with how it happens, what I am running and what I have already tried.
> I could use any help I can get so thank you for reading.
>
> This link points to a screenshot of htop running showing the constant
> high 40-60% CPU usage that /usr/bin/X now sits at:
> http://i.imgur.com/mRIzG.png
>
> My computer is quite powerful and should easily be able to handle any
> load that any part of linux can throw at it. I have a Quad Core i2500k
> CPU, an NVIDIA 560 Ti Graphics Card and 8GB RAM, so no hardware
> bottlenecks thats for sure (and my Windows Partition runs like a
> breeze; which proves that the hardware seems to be solid). However,
> with that in mind this is what happens:
>
> 1. Start computer, everything is working fine, /usr/bin/X is behaving
> normally. I can play and watch videos with no lag at all.
> 2. Wait some undefined period of time and just work on stuff (I don't
> actually know how to reliably reproduce the problem but it does
> happen every single time I use my linux partition).
> 3. Watch one of my CPU's spike to an average of 50% and keyboard
> responsiveness drop to the point where I can notice the lag in
> response time. Video playback also becomes impossibly slow at this
> point.
>
> I would not have thought that the keyboard would be an issue but it is
> lagging so I have a Razer Acosta keyboard if that helps.
>
> In short, I have no idea what is causing the problem, on the software
> side I am running:
>
> $ uname -a
> Linux ShhnapDesk 2.6.38-10-generic #46-Ubuntu SMP Tue Jun 28 15:07:17
> UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
> $ cat /etc/lsb-release
> DISTRIB_ID=Ubuntu
> DISTRIB_RELEASE=11.04
> DISTRIB_CODENAME=natty
> DISTRIB_DESCRIPTION="Ubuntu 11.04"
> $ xmonad --version
> xmonad 0.9.2
>
> My window manager is XMonad as you can see from above and I am also
> running XMobar (0.13) through that. I have tried:
>
> * Asking for help elsewhere:
> http://superuser.com/questions/328612/linux-x11-is-using-up-50-of-one-of-my-cpus-and-lagging-terribly
> * Uninstalling Flash because I read that it might be the problem.
> * Using Firefox instead of Google Chrome (I found that chrome had
> some X issues in the past)
> * Closing every single X program (bar XMonad) to see if /usr/bin/X
> would start behaving again.
>
> But none of those troubleshooting attempts worked out for me.
>
> I do not know what else to do other than read through the entire
> codebase of X and try and reverse engineer where my problem lies. If
> anybody has any suggestions then please make them and any extra
> information that you happen to require I will be more than happy to
> provide. This problem is significantly hindering my Linux joy and I
> love Linux. I use it for everything and have done so for the last
> three years.
>
> Thanks in advance for any and all help,
> Robert
>
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>
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