After the previous editors comment about optical disks I have run my machine with a CD in both CD drives. However I triggered another 30s halt by plugging in a USB camera. Here is the dmseg.
[ 123.506818] usb 4-1: new full speed USB device using uhci_hcd and address 2 [ 123.691727] usb 4-1: configuration #1 chosen from 1 choice [ 141.849608] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen [ 141.849642] ata1.00: cmd c8/00:10:fe:1b:76/00:00:00:00:00/e2 tag 0 cdb 0x0 data 8192 in [ 141.849644] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) [ 145.349321] ata1: port is slow to respond, please be patient (Status 0xd0) [ 156.865767] ata1: port failed to respond (30 secs, Status 0xd0) [ 156.865797] ata1: soft resetting port [ 156.949132] ATA: abnormal status 0x7F on port 0x000000000001d007 [ 156.954547] ATA: abnormal status 0x7F on port 0x000000000001d007 [ 156.966548] ata1.00: configured for UDMA/133 [ 156.966555] ata1: EH complete [ 156.983921] SCSI device sda: 490234752 512-byte hdwr sectors (251000 MB) [ 156.983974] sda: Write Protect is off [ 156.983976] sda: Mode Sense: 00 3a 00 00 [ 156.985481] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA -- Hard disk I/O randomly freezes when hald is running and optical drive is empty https://launchpad.net/bugs/84603 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
