Comment 4 for bug 91940

copying (possibly) useful log data out of the duplicate bug:

If I boot with the newest kernel 2.6.20-10.17, linux won't boot. I get the following errors:

  ATA: abnormal status 0x7F on port 0x40CF
  ATA: abnormal status 0x7F on port 0x40CF
  ATA: abnormal status 0x7F on port 0x40CF
  ata1.01: qc timeout (cmd 0x27)
  ata1.01: failed to set xfermode (err_mask=0x40)
  ata1.01: limiting speed to PIO0
  ata1: failed to recover some devices, retrying in 5 secs
  ATA: abnormal status 0x7F on port 0x40CF
  ATA: abnormal status 0x7F on port 0x40CF
  ATA: abnormal status 0x7F on port 0x40CF
  ata1.01: qc timeout (cmd 0x27)
  ata1.01: failed to set xfermode (err_mask=0x40)
  ata1.01: disabled
  scsi1: ata_piix
  ATA: abnormal status 0x7F on port 0x40C7
  hda: ATAPI 24x DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache, UDMA(33)
  Uniform CD-ROM driver Revision: 3.20

Done.

       Check root= bootarg cat /proc/cmdline or missing modules, devices: cat /proc/modules ls /dev
ALERT! /dev/disk/by-uuid/228d13f9-92fd-4569-836b-9c7f75cb94c6 does not exist. Dropping to a shell.

with kernel 2.6.20-9.16 I can boot without problems. Though I get three "ATA: abnormal mode" lines as well, but it still finds the HD:

[ 5.044000] ata1: SATA max UDMA/133 cmd 0x40C8 ctl 0x40E6 bmdma 0x40A0 irq 20
[ 5.044000] ata2: SATA max UDMA/133 cmd 0x40C0 ctl 0x40E2 bmdma 0x40A8 irq 20
[ 5.044000] scsi0 : ata_piix
[ 5.208000] ATA: abnormal status 0x7F on port 0x40CF
[ 5.220000] ATA: abnormal status 0x7F on port 0x40CF
[ 5.244000] ata1.01: ATA-8, max UDMA/100, 234441648 sectors: LBA48 NCQ (depth 0/32)
[ 5.244000] ata1.01: ata1: dev 1 multi count 16
[ 5.268000] ata1.01: configured for UDMA/100
[ 5.268000] scsi1 : ata_piix
[ 5.432000] ATA: abnormal status 0x7F on port 0x40C7
[ 5.432000] scsi 0:0:1:0: Direct-Access ATA FUJITSU MHW2120B 0081 PQ: 0 ANSI: 5

I'm running a MacBook Pro 15" with Feisty.

old_toby

ProblemType: Bug
Architecture: i386
Date: Wed Mar 14 19:41:53 2007
DistroRelease: Ubuntu 7.04
Uname: Linux landroval 2.6.20-9-generic #2 SMP Mon Feb 26 03:01:44 UTC 2007 i686 GNU/Linux