Comment 5 for bug 756938

Update:

Removing the acpi_backlight_vendor kernel parameter will lead to a working hibernate/wakeup constellation, but other problems occur:

* X.org freezes, but console access still works, so that gdm may be restarted.
* Brightness control keys don't work any longer. (Only reduction of brightness is possible. Pressing the keycode another time locks the brightness at it's full level. Shortly afterwards, the backlight turn off and cannot be reenabled until a reboot is triggered.)

Proposed solution: Check backlight_vendor_asus for hibernate/wakeup issues.