no santa rosa here but running Gutsy with latest 2.6.22-10 kernel. i
have a SAMSUNG HM160JI .

i got the following messages in dmesg along with very strange behaviour
after a failed hibernation.

[   94.664000] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
[   94.664000] ata1.00: cmd c8/00:10:1f:bd:82/00:00:00:00:00/e1 tag 0 cdb 0x0 
data 8192 in
[   94.664000]          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 
(timeout)
[   99.704000] ata1: port is slow to respond, please be patient (Status 0xd0)
[  104.688000] ata1: device not ready (errno=-16), forcing hardreset
[  104.688000] ata1: soft resetting port
[  134.904000] ata1.00: qc timeout (cmd 0xec)
[  134.904000] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[  134.904000] ata1.00: revalidation failed (errno=-5)
[  134.904000] ata1: failed to recover some devices, retrying in 5 secs
[  144.948000] ata1: port is slow to respond, please be patient (Status 0xd0)
[  149.932000] ata1: device not ready (errno=-16), forcing hardreset
[  149.932000] ata1: soft resetting port
[  153.956000] ata1.00: revalidation failed (errno=-2)
[  153.956000] ata1: failed to recover some devices, retrying in 5 secs
[  158.960000] ata1: soft resetting port
[  159.348000] ata1.00: configured for UDMA/100
[  159.348000] ata1: EH complete
[  160.056000] sd 0:0:0:0: [sda] 312581808 512-byte hardware sectors (160042 MB)
[  160.056000] sd 0:0:0:0: [sda] Write Protect is off
[  160.056000] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[  160.056000] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, 
doesn't support DPO or FUA

P.S. is bug #131633 a duplicate?

** Attachment added: "the whole dmesg output"
   http://launchpadlibrarian.net/8957387/dmesg.txt

-- 
Santa rosa , strange messages  in the kernel log
https://bugs.launchpad.net/bugs/120839
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