Xorg often taking a lot of CPU, whole system slow

NoOp glgxg at sbcglobal.net
Thu Feb 4 22:47:14 UTC 2010

On 02/03/2010 11:17 PM, Dotan Cohen wrote:
>>> Thanks Gary, I'm going through them now.
>> Well... so am I. I have one system that is freezing w/Ubuntu; locks up,
>> screen is still there but no mouse or keyboard. I have to hard reboot to
>> get it working again & I suspect it's an X problem. Dualboots to WinXP
>> w/no issues, checked the drives & all check out fine as does the memory,
>> exact same hardware & bios versions as two other systems (MB, graphic
>> card, etc), tried different kernals, have 8.04, 9.04, and 9.10 on it &
>> they all seem to lock randomly.
>> So... I'm also adding:
>> https://wiki.ubuntu.com/X/Troubleshooting/Freeze
>> to the list.
> Thanks. I have not experienced freezing, but I will read that _before_
> it happens!

In my case I _think_ it was a heat issue. Got a thermal shutdown today
on that machine. So I took out the motherboard (all the casing screws
were lose, so it may have gotten a false temp sensor reading), popped
the cpu fan & heatsink, cleaned and reapplied new thermal grease. It's
an old Intel D865GBF motherboard, so the original grease/compount was
like clay... Put everything back together, buttoned it up & have
rebooted multiple times into WinXP, hardy, jaunty, and karmic. Been
running the nearly flat out for the past hour (running glxgears +
Firefox w/youtube & flash, system monitor, lmsensors) in karmic and the
highest the cpu is going is 56C (this system which is a mirror of the
other often hits 70C when pressed hard for long periods).

So I'm hoping that is the fix & that it's nothing actually to do with
Ubuntu and/or X.

More information about the ubuntu-users mailing list