One of the well known Linux problem is the lack of hardware drivers. I've sometime complained, in the past, about the poor support my HP ScanJet G4050 scanner had on Linux promising myself to try to find a solution using VirtualBox with a Windows guest machine. Fortunately a good enough SANE scanner driver came out and I forgot quickly about my intent. I lived well with my SANE driver recently when I found a bunch of old film negatives. The HP SANE driver works fine and fast but doesn't support the scanner transparent materials adapter (TMA). I so decided to go back to my initial idea about using VirtualBox and a Windows guest machine.
In order to fully support USB devices an extension pack has to be installed in addition to VirtualBox main program. The extension pack version must match with the VirtualBox one. Since the VirtualBox version I used, installed with Ubuntu Software Centre, did not match with any of the available versions I had to download both main program and extension pack.
I first uninstalled the the VirtualBox version I had on my computer then I installed the downloaded “.deb” file. Once the right version was ready I could eventually install the expansion pack from VirtualBox preferences.
The extension pack installation starts asking confirmation first