I tested this on my Thinkpad T61 and could still reproduce the bug. I just upgraded to the latest kernel. I see the ACPI event being sent using acpi_listen.
$ dpkg -l | grep linux-image ii linux-image-2.6.35-28-generic-pae 2.6.35-28.49 Linux kernel image for version 2.6.35 on x86 $ uname -a Linux Tux 2.6.35-28-generic-pae #49-Ubuntu SMP Tue Mar 1 14:58:06 UTC 2011 i686 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/722747 Title: Touchpad enable/disable hotkey broken in 2.6.35-27 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs