I've been through all the BIOS screens looking for a setting to flip, but there's nothing there. Some web searching told me that under Windows, there's a setting you can change that will affect this, but I couldn't find anything similar for Linux, until finally drc clued me in to /proc/acpi/wakeup.
cat /proc/acpi/wakeupwill tell you all the events that can cause your machine to wake up from various sleep states.
Unfortunately, they're also obscurely coded. Here are mine:
Device S-state Status Sysfs node SLPB S4 *enabled P32 S4 disabled pci:0000:00:1e.0 UAR1 S4 enabled pnp:00:0a PEX0 S4 disabled pci:0000:00:1c.0 PEX1 S4 disabled PEX2 S4 disabled pci:0000:00:1c.2 PEX3 S4 disabled pci:0000:00:1c.3 PEX4 S4 disabled PEX5 S4 disabled UHC1 S3 disabled pci:0000:00:1d.0 UHC2 S3 disabled pci:0000:00:1d.1 UHC3 S3 disabled pci:0000:00:1d.2 UHC4 S3 disabled pci:0000:00:1d.3 EHCI S3 disabled pci:0000:00:1d.7 AC9M S4 disabled AZAL S4 disabled pci:0000:00:1b.0
What do all those symbols mean? I have no clue. Apparently the codes come from the BIOS's DSDT code, and since it varies from board to board, nobody has published tables of likely translations.
The only two wakeups that were enabled for me were SLPB and UAR1.
SLPB apparently stands for SLeeP Button, and Rik suggested UAR
probably stood for Universal Asynchronous Receiver (the more familiar
term UART both receives and Transmits.)
Some of the other devices in the list can possibly be identified by
comparing their pci: codes against
lspci, but not those two.
Time for some experimentation. You can toggle any of these by writing to the wakeup device:
echo UAR1 >/proc/acpi/wakeup
It turned out that to disable mouse and keyboard wakeup, I had to disable both SLPB and UAR1. With both disabled, the machine wakes up when I press the power button. (What the SLeeP Button is, if it's not the power button, I don't know.)
My mouse and keyboard are PS/2. For a USB mouse and keyboard, look for something like USB0, UHC0, USB1.
The UAR1 setting is remembered even across boots: there's no need to do anything to make sure the setting is remembered. But the SLPB setting resets every time I boot. So I edited /etc/rc.local and added this line:
echo SLPB >/proc/acpi/wakeup
[ 09:21 Jul 02, 2009 More linux/kernel | permalink to this entry ]