the patch for hal-system-lcd-set-brightness-linux is missing. As a matter it's a bug in dash cf bug #92189
$((value +1)) should work with a posix shell. ** Changed in: hal (Ubuntu) Status: Unconfirmed => Confirmed -- bug #65028 still exists in feisty https://launchpad.net/bugs/96044 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs