I am having this problem also, on a Compaq Presario CQ62-219WM. The problem has gotten worse after I upgraded to the Natty alpha. This thread on the forums describes my situation: http://ubuntuforums.org/showthread.php?p=10555397
Someone there suggests tweaking the power saving settings. I am not sure what the consequences of that would be though.
I am having this problem also, on a Compaq Presario CQ62-219WM. The problem has gotten worse after I upgraded to the Natty alpha. This thread on the forums describes my situation: http:// ubuntuforums. org/showthread. php?p=10555397
Someone there suggests tweaking the power saving settings. I am not sure what the consequences of that would be though.