On Sunday 23 September 2007, Linus Torvalds wrote:
quoted text
> From a "future behaviour" standpoint it would probably be interesting to 
> hear whether Mihai can make his machine with not with the old IDE layer 
> (which distributions are migrating away from) but with the ATA layer 
> (libata) instead. It too should hopefully know about using ACPI to restore 
> any ATA controller quirks.

  I switched to libata, but it behaves like the old IDE without ACPI. I
  did not manage to get a full dmesg (apparently all volumes are mounted
  r/o right after a power up from a s2ram) but I did make a picture, from
  which I quote (if I may say so):

  "
  ata1.00: configured for PIO0
  sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08
  sd 0:0:0:0: [sda] Sense key : 0xb [current] [descriptor]
  Descriptor sense data with sense descriptors (in hex):
          72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00
          07 65 35 25
  sd 0:0:0:0: [sda] ASC=0x0 ASCQ=0x0
  end_request: I/O error, dev sda, sector 124073509
  ata1: EH complete
  sd 0:0:0:0: [sda] Write Protect is off
  sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
  ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
  ata1.00: cmd c5/00:10:75:36:65/00:00:00:00:00/e7 tag 0 cdb 0x0 data 8192 out
           res 51/04:10:75:36:65/00:00:00:00:00/e7 Emask 0x1 (device error)
  ata1.00: configured for PIO0
  ata1: EH complete
  "

  The last six lines repeat six times after which the whole things goes
  from the beginning:
  "
  ata1.00: configured for PIO0
  ...
  "

  It all gets crazy the moment I (or a process) try to access the root
  (or any other drive), until then, everything is nice and quiet.

  Mmm... in the excerpt above it says: "Write Protect is off" but when I did
  $ mount -o remount,rw /
  I got something like: "the device is write protected".

  I tried to save the dmesg on a mmc, but after powering up it said:
  "out of disk space"

  These are about all symptoms that I noticed... oh, and 'scsi_eh_0/1'
  enters disk-sleep often.

  I attached the dmesg pre s2ram.

  Thanks,

-- 
Mihai Don