mute drum sound before Ubuntu login

If you tried all the HowTos but no one really solved that annoying drum sound before login, you can try my solution (tested on Ubuntu 10.10):

• open a terminal and copy-paste the following command: sudo gedit /usr/share/gdm/autostart/LoginWindow/libcanberra-ready-sound.desktop
• comment the line which begins with "Exec=" by adding a # at the beginning of the line
• save, quit, and at next restart you won't have the login sound.

How to add a startup process on Windows (example: task manager)

If you want a program to run automatically when you turn on your pc you have to follow these steps:

(I explain it through the example of task manager)

• rightclick Start - Programs - Startup (italian: Start - Tutti i programmi - Esecuzione automatica) and select Open
• rightclick on the folder and select New - Shortcut (italian: Nuovo - Collegamento)
• insert the path of the executable file of the desired process (e.g. C:\Windows\System32\taskmgr.exe )
• rightclick on your new shortcut and choose Properties if you want, for example, to run the program minimized to tray or if you want a normal window to open

provisional solution for /usr/lib/cups/backend/hp failed

Since a few weeks I get this error when i try to print any document with my HP printer:

/usr/lib/cups/backend/hp failed

I spent hours googling for a solution, but none of the ones i found seems to work for me.
Then accidentally I did the following steps, and my printer started to work.
I don't know if it was by chance, or why it works, but if you haven't found a solution yet maybe you can try this one too:

• turn off and then again on your printer
• print the document
• you should get a notification that the document has been printed, but the printer didn't move and the document is still in the print queue
• go to the print queue and refresh job list (the blue curved arrow)
• your doc should be held for about 5 minutes
• turn off your printer and wait until the document will not be held, its status should become "pending"
• turn on the printer; the doc should be printed

I hope it works for those who haven't found a solution for weeks..

let me know!

P.s.: obviuosly this is a provisional solution, it doesn't solve the problem..