Public bug reported:

Since installing a Samsung/TSSTCorp SH-S223C SATA DVD-RW drive, my natty/11.04 
installation usually hangs during booting.  Unfortunately no dmesg log gets 
written to disk in this case.  It doesn't always hang in the same place, but 
usually it is soon after:
"Begin: Running /scripts/init-bottom ... done."
(Of course one has to fiddle with the boot parameters in GRUB to actually see 
any output at all, as for some reason recent Ubuntus like to show a blank 
screen for most of the boot process.)

Ubuntu lucid/10.04 boots without any problems.

With a bit of Googling I found the following workaround:
Add libata.atapi_passthru16=0 to the kernel boot parameters in GRUB.

Drive model is: SH-S223C/RSMS
Drive firmware is: SB06

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-10-generic 2.6.38-10.46
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Uname: Linux 2.6.38-10-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: SB [HDA ATI SB], device 0: ALC892 Analog [ALC892 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  mike       1702 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xfe5f8000 irq 16'
   Mixer name   : 'Realtek ALC892'
   Components   : 'HDA:10ec0892,1043841b,00100302'
   Controls      : 32
   Simple ctrls  : 18
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfe7e8000 irq 19'
   Mixer name   : 'ATI RS690/780 HDMI'
   Components   : 'HDA:1002791a,00791a00,00100000'
   Controls      : 4
   Simple ctrls  : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Wed Jul 27 18:47:27 2011
HibernationDevice: RESUME=UUID=f949322b-f0e9-4cc5-949f-1c292f45cac0
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MachineType: System manufacturer System Product Name
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-10-generic 
root=UUID=b18ea676-46c3-453a-ba0d-503567d57c13 ro libata.atapi_passthru16=0
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-10-generic N/A
 linux-backports-modules-2.6.38-10-generic  N/A
 linux-firmware                             1.52
RfKill:
 0: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to natty on 2011-05-28 (60 days ago)
dmi.bios.date: 08/19/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1602
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M4A88TD-M EVO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1602:bd08/19/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A88TD-MEVO:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug natty

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https://bugs.launchpad.net/bugs/817147

Title:
  Boot hang on natty with Samsung SH-S223C DVD-RW Drive

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