Comment 5 for bug 840857

Got the exact same problem on Dell Inspiron 15R. Touchpad works at login screen only. The key mapped on keyboard for enabling/disabling touchpad is Fn+A dedicated touchpad key.

However, I get notification of touchpad being enabled or disabled even if I only hit touchpad key on keyboard (without holding FN key first). All other dedicated keys for changing brightness and enabling/disabling wireless etc. works only if they are pressed as a combination with Fn key.