<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div><span>Trying a different driver was going to be my next suggestion.</span></div><div><br><span></span></div><div><span>Actually, I had a problem with my Ubuntu 11.04 install (Unity) tonight. After an update and reboot the CPU usage went up to 100% and stayed there. By looking at top I could see that it was xorg that was chomping on the CPU. I haven't seen this problem in Ubuntu since the 11.04 Alphas - thought it was well and truly fixed. This machine is not my production machine - just a test machine for 11.04 so it doesn't get used that much - but I can say that it hasn't behaved like this in the last four and a half months. The only thing that has changed is a new Nvidia 6200 graphics card, installed about two weeks ago.<br></span></div><div><br><span></span></div><div><span>I had to reboot (for
another reason) and the problem hasn't returned, but it seems a bit of a worry.</span></div><div><br><span></span></div><div><span>Chris.<br></span></div><div><br></div><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Arial" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Robert Massaioli <robertmassaioli@gmail.com><br><b><span style="font-weight: bold;">To:</span></b> Pat Kane <pekane52@gmail.com><br><b><span style="font-weight: bold;">Cc:</span></b> xorg@freedesktop.org<br><b><span style="font-weight: bold;">Sent:</span></b> Thursday, 8 September 2011 12:18 PM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: High /usr/bin/X CPU Usage<br></font><br><meta http-equiv="x-dns-prefetch-control" content="off"><div id="yiv1656482563">Thankyou for that advice and I will be sure to do that;
recording all of the system calls that it makes would be useful I imagine. <div><br></div><div>I am still trying to solve this problem as best as I can though. The latest thing that I have tried is just upgrading my NVIDIA drivers to the absolute latest beta versions (285.03 to be precise) and so far so good. However, that was only a few hours ago and the problem probably still exists.</div>
<div><br></div><div>I will update you on any progress and, once again, any and all ideas and suggestions are very welcome,</div><div>I am going to get to the bottom of this,</div><div>Robert</div><div><br></div><div>P.S. I have also contacted the Nvidia developers and submitted a bug report and pointed them to the descriptions of the problems that I have been having.<br>
<div><br><div class="yiv1656482563gmail_quote">On Thu, Sep 8, 2011 at 12:03 PM, Pat Kane <span dir="ltr"><<a rel="nofollow" ymailto="mailto:pekane52@gmail.com" target="_blank" href="mailto:pekane52@gmail.com">pekane52@gmail.com</a>></span> wrote:<br><blockquote class="yiv1656482563gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
It would be interesting to see strace output of the Xorg process when<br>
it is in that state. That is a bit tricky to do however, you need to ssh into<br>
the box to run strace, otherwise you might hit a deadlock, see:<br>
<br>
<a rel="nofollow" target="_blank" href="http://lists.x.org/archives/xorg/2008-August/038048.html">http://lists.x.org/archives/xorg/2008-August/038048.html</a><br>
<br>
Run the strace with detailed timestamps and do not be confused by<br>
"normal" Xorg activity. You should practice running strace on the<br>
X server when it is not broken.<br>
<br>
Pat<br>
---<br>
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