Comment 0 for bug 1893300

[ Impact ]
After printers (non-ippusb protocal) have been disconnected, the status of cups still shows "idle" instead of "Offline", so seems the disconnected procedure hasn't worked well.

[ Test Case ]
1. Connect the printer (non-ippusb protocal)(which isn't 070104) with any 20.04 machine
2. Wait for the status of cups became "Idle" (lpstat -p)
3. Unplug the cable of the printer
4. Check the status of cups again. (lpstat -p)

[Expected result]
The status should show Offline.

[Actual result]
The status shows Idle.