Yes, there is really an issue with the lid state.
If cat /proc/acpi/button/lid/LID/state always returns: state: closed whether laptop is closed or open, you have an acpi bug...
But g-p-m NEVER does dpms on when lid state = closed. The bug is fixed in g-p-m 2.17.1, where you're able to set a gconf-key to make it work.
Yes, there is really an issue with the lid state.
If button/ lid/LID/ state
cat /proc/acpi/
always returns:
state: closed
whether laptop is closed or open, you have an acpi bug...
But g-p-m NEVER does dpms on when lid state = closed.
The bug is fixed in g-p-m 2.17.1, where you're able to set a gconf-key to make it work.