Xorg cpu usage

[gustavo halperin <ggh.develop@gmail.com>]

Hello

I live the past night the Laptop (Toshiba Portege R100, Pentium M) on 
during all the night and in the morning the temperature was 67C. I take 
this information from a file "/proc/acpi/thermal_zone/THRM/temperature". 
At the same time the "Xorg" process was using 95% of the CPU.
 After few minutes of use the computer, the system back to normal 
temperature (between 49-51C), but What happens ? Why if I live the Linux 
without use for some hours the "Xorg" came to use all the CPU ??

 Thank you in advance,
       Gustavo Halperin