Laptop is napping

[Geoffrey Leach]

My new ASUS laptop periodically takes a 30 second or so nap. The disk  
diagnostics show no problem, and its running on AC. Here's a snip from  
the log.  Suggestions would be appreciated.

Mar 26 09:49:47 mtranch-mobile kernel: ata2.01: exception Emask 0x0  
SAct 0x0 SErr 0x0 action 0x2 frozen
Mar 26 09:49:47 mtranch-mobile kernel: ata2.01: (BMDMA stat 0x64)
Mar 26 09:49:47 mtranch-mobile kernel: ata2.01: tag 0 cmd 0xa0 Emask  
0x4 stat 0x40 err 0x0 (timeout)
Mar 26 09:49:54 mtranch-mobile kernel: ata2: port is slow to respond,  
please be patient (Status 0xd0)
Mar 26 09:50:17 mtranch-mobile kernel: ata2: port failed to respond (30  
secs, Status 0xd0)
Mar 26 09:50:17 mtranch-mobile kernel: ata2: soft resetting port
Mar 26 09:50:18 mtranch-mobile kernel: ata2.00: configured for UDMA/100
Mar 26 09:50:18 mtranch-mobile kernel: ata2.01: configured for UDMA/33
Mar 26 09:50:18 mtranch-mobile kernel: ata2: EH complete
Mar 26 09:50:18 mtranch-mobile kernel: SCSI device sda: 195371568  
512-byte hdwr sectors (100030 MB)
Mar 26 09:50:18 mtranch-mobile kernel: sda: Write Protect is off
Mar 26 09:50:18 mtranch-mobile kernel: SCSI device sda: drive cache:  
write back
Mar 26 09:50:18 mtranch-mobile kernel: SCSI device sda: 195371568  
512-byte hdwr sectors (100030 MB)
Mar 26 09:50:18 mtranch-mobile kernel: sda: Write Protect is off
Mar 26 09:50:18 mtranch-mobile kernel: SCSI device sda: drive cache:  
write back
Mar 26 10:00:07 mtranch-mobile ntpd[2974]: synchronized to  
192.83.249.31, stratum 2