Originally Posted by JNKlikesLinux
It may be an issue with Ubuntu 10.10, unless this is affecting the way your computer works, I would not worry about this.
I also have 10.10 on a USB stick. I used Universal USB installer to put 10.10 on it with persistance and there is no issues with sleep/standby with it
I did a regular install of 10.10 on the external HDD so I think the problem is with the different types of installs.
It's a problem because I'm forced to shut down when I'd rather not.