Hi folks, I've got a problem with my laptop that's recently occurred. The processor usage gets stuck at 100%, and I can't work out why. If I look at processes with top or htop, atd is the biggest user of the processor, with about 20%. Adding up all the processes gives a rough total of 30%. No idea of where the other 70% is going, yet the total at the top is 100%. Issuing the command sudo service stop atd almost immediately brings the total processor usage down to 2-18%. Then issuing sudo service start atd takes it right back up to 100% Any idea what atd is up to? How can I find out? I did get a disk space warning the other day, but have freed up a load of space since. Ubuntu 11.04, fully patched. No recent changes AFAIK apart from installing patches regularly. Any ideas? Steve