Public bug reported:

When I boot up on the 2.6.27-2 server kernel (Intrepid), my hard drive
is not detected. It works fine with the 2.6.24-16 server kernel.

Upon booting 2.6.27-2, I get the following message (at the initrd stage still, 
I think):
Gave up waiting for root device
  [....]
ALERT! /dev/disk/by-uuid/658bcd8c... does not exist. Dropping to a shell!

There is indeed no /dev/disk directory.

At the shell, /proc/modules lists the following modules: 
sg, sr_mod, cdrom, ohci1394, ieee1394, pata_atiixp, ehci_hcd, ahci, 
ata_generic, pata_acpi, libata, usbcore, r8169, scsi_mod, dock, thermal, 
processor, fan, fbcon,tileblit, font, bitblit, softcursor, cn, fuse

According to my motherboard manual, this is the hardware:
North bridge: AMD 780G
South Bridge: AMD SB700
I/O Controller: iTE IT8718

When booting 2.6.24-16, I get the following details:

[EMAIL PROTECTED]:~$ lspci
00:00.0 Host bridge: Advanced Micro Devices [AMD] RS780 Host Bridge
00:01.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (int 
gfx)
00:0a.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE 
port 5)
00:11.0 SATA controller: ATI Technologies Inc SB700/SB800 SATA Controller [AHCI 
mode]
00:12.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller
00:12.1 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI1 Controller
00:12.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
00:13.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller
00:13.1 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI1 Controller
00:13.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 3a)
00:14.1 IDE interface: ATI Technologies Inc SB700/SB800 IDE Controller
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia
00:14.3 ISA bridge: ATI Technologies Inc SB700/SB800 LPC host controller
00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge
00:14.5 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI2 Controller
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] 
HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address 
Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM 
Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] 
Miscellaneous Control
01:05.0 VGA compatible controller: ATI Technologies Inc Radeon HD 3200 Graphics
01:05.1 Audio device: ATI Technologies Inc RS780 Azalia controller
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI 
Express Gigabit Ethernet controller (rev 02)
03:0e.0 FireWire (IEEE 1394): Texas Instruments TSB43AB23 IEEE-1394a-2000 
Controller (PHY/Link)

[EMAIL PROTECTED]:~$ lsmod
Module                  Size  Used by
ipv6                  325768  16 
af_packet              34440  2 
iptable_filter         11776  0 
ip_tables              31720  1 iptable_filter
x_tables               30728  1 ip_tables
sbp2                   34440  0 
parport_pc             48296  1 
lp                     22084  0 
parport                51340  2 parport_pc,lp
loop                   28676  0 
sr_mod                 27300  0 
cdrom                  48680  1 sr_mod
snd_hda_intel         447576  0 
k8temp                 14848  0 
snd_pcm                99336  1 snd_hda_intel
snd_timer              35080  1 snd_pcm
snd_page_alloc         20368  2 snd_hda_intel,snd_pcm
snd_hwdep              19720  1 snd_hda_intel
snd                    78024  4 snd_hda_intel,snd_pcm,snd_timer,snd_hwdep
atiixp                 13840  0 [permanent]
i2c_piix4              18316  0 
wmi_acer               18244  0 
pcspkr                 12160  0 
evdev                  22144  0 
ide_core              143768  1 atiixp
button                 18080  0 
shpchp                 45340  0 
pci_hotplug            41776  1 shpchp
i2c_core               35712  1 i2c_piix4
soundcore              17568  1 snd
ext3                  156176  3 
jbd                    64168  1 ext3
mbcache                18560  1 ext3
sg                     48920  0 
sd_mod                 40448  7 
pata_atiixp            17664  0 
ata_generic            17156  0 
floppy                 76264  0 
ohci1394               43700  0 
ieee1394              114008  2 sbp2,ohci1394
pata_acpi              17024  0 
ahci                   40196  5 
ehci_hcd               49164  0 
ohci_hcd               34692  0 
libata                183472  4 pata_atiixp,ata_generic,pata_acpi,ahci
r8169                  43780  0 
scsi_mod              185528  5 sbp2,sr_mod,sg,sd_mod,libata
usbcore               176816  3 ehci_hcd,ohci_hcd
thermal                26912  0 
processor              49608  1 thermal
fan                    13960  0 
fbcon                  53504  0 
tileblit               11264  1 fbcon
font                   17280  1 fbcon
bitblit                14592  1 fbcon
softcursor             10880  1 bitblit
fuse                   63280  1 

Thanks. If you need any other details, I can try to provide them.

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

-- 
Hard drive not detected on AMD SB700
https://bugs.launchpad.net/bugs/267405
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