Public bug reported:
This bug occurs in Lucid but was not present in Hardy.
I installed Lucid on a Sun w2100z workstation and on first boot neither
the keyboard nor the mouse were functioning nor were external USB flash
drives detected. lsusb only returned two devices and they were the
internal hubs. I searched for similar reports and the solution was
usually to enable "Legacy USB" mode in the BIOS. This particular machine
had no such option but it did have separate USB and USB 2.0 options
which were both enabled.
I decided to try flipping other options in the BIOS one by one and
discovered to my amazement that enabling SATA causes USB to function.
The workstation's only disks are on the SCSI bus. There was another
option to enable the "SATA BIOS" once SATA was enabled, but that can be
left off without affecting USB. The "SATA BIOS" option caused a boot
message to appear which described the SATA controller but I don't know
what else it does.
Note that this workstation and our other w2100z's function fine while
running Hardy and with SATA disabled.
Linux foobar 2.6.32-23-generic #37-Ubuntu SMP Fri Jun 11 08:03:28 UTC 2010
x86_64 GNU/Linux
Ubuntu 2.6.32-23.37-generic 2.6.32.15+drm33.5
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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Kernel doesn't detect USB devices based on BIOS SATA settings
https://bugs.launchpad.net/bugs/607375
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