Don't wake up on lid open

Hi,

My laptop wakes from suspend on lid open - even if I disable suspend on lid close in KDE. Some research revealed that waking cues are controlled by /proc/acpi/wakeup. I disabled the lid event by doing "echo LID0 > /proc/acpi/wakeup", after which cat /proc/acpi/wakeup gives:

Device S-state Status Sysfs node
P0P1 S4 *disabled
GLAN S4 *disabled
EHC1 S4 *enabled pci:0000:00:1d.0
XHC S4 *enabled pci:0000:00:14.0
HDEF S4 *disabled pci:0000:00:1b.0
PEG0 S4 *disabled
PEGP S4 *disabled
PEG1 S4 *disabled
PEG2 S4 *disabled
LID0 S3 *disabled
PWRB S4 *enabled

Which looks successful, but it didn't work: opening the lid still wakes the device. Disabling PWRB and the others doesn't change this either. Feels like /proc/acpi/wakeup is being ignored somehow.

Help? :)