Comment 31 for bug 1068393

(In reply to Comment #29 and #30)

Hi Christopher,

I tested Ubuntu 11.10 without installing it (i.e., Try Ubuntu without installing) on ASUS P4S8X-MX mainboard.

I will say that Ubuntu 11.10 does not suffer from the USB instant wakeup bug that currently exists in Ubuntu 12.04.
Here is what /proc/acpi/wakeup looks like,

$ cat /proc/acpi/wakeup
Device S-state Status Sysfs node
UAR1 S4 *disabled pnp:00:08
PS2K S4 *enabled pnp:00:0c
PS2M S4 *disabled pnp:00:0d
EUSB S3 *disabled pci:0000:00:03.3
USB S3 *disabled pci:0000:00:03.0
USB2 S3 *disabled pci:0000:00:03.1
USB3 S3 *disabled pci:0000:00:03.2
AC97 S4 *disabled pci:0000:00:02.7
MC97 S4 *disabled
PCI1 S4 *disabled
PCI2 S4 *disabled
PCI3 S4 *disabled
MAC S4 *disabled pci:0000:00:04.0

Instant wakeup is not happening because Status for EUSB and USBx devices are at *disabled state.

In Ubuntu 12.04 (Linux 3.2), they will all be at *enabled state.
Just to confirm the Linux kernel version,

$ uname -r
3.0.0-12-generic

The result here is in line with what Lan Tianyu discussed in Comment #26 of this same bug report I submitted over there at kernel.org.

https://bugzilla.kernel.org/show_bug.cgi?id=47991#c26

Regards,

fpgahardwareengineer