Trying a different driver was going to be my next suggestion. 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.
I had to reboot (for another reason) and the problem hasn't returned, but it seems a bit of a worry. Chris. ________________________________ From: Robert Massaioli <[email protected]> To: Pat Kane <[email protected]> Cc: [email protected] Sent: Thursday, 8 September 2011 12:18 PM Subject: Re: High /usr/bin/X CPU Usage 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. 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. I will update you on any progress and, once again, any and all ideas and suggestions are very welcome, I am going to get to the bottom of this, Robert 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. On Thu, Sep 8, 2011 at 12:03 PM, Pat Kane <[email protected]> wrote: It would be interesting to see strace output of the Xorg process when >it is in that state. That is a bit tricky to do however, you need to ssh >into >the box to run strace, otherwise you might hit a deadlock, see: > > http://lists.x.org/archives/xorg/2008-August/038048.html > >Run the strace with detailed timestamps and do not be confused by >"normal" Xorg activity. You should practice running strace on the >X server when it is not broken. > >Pat >--- > > >
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