The original problem reported by this bug is partially fixed; the lshw-gtk package installs a .desktop file that launches "su-to-root -X -c lshw-gtk". However, there are still two problems:
1. su-to-root is contained in the menu package, which is not a dependency of lshw-gtk. Because menu does not get installed, the installed .desktop file is inoperative, see https://bugs.launchpad.net/ubuntu/+source/lshw/+bug/785693 2. Using su-to-root is inconsistent with what other applications that need root access do. Synaptic, GParted, and presumably everybody else create (using synaptic as an example) /usr/share/polkit-1/actions/com.ubuntu.pkexec.synaptic.policy and /usr/bin/synaptic-pkexec, which results in an overall more user-friendly experience. Let me know if there's anything else I can to do help here.