Comment 372 for bug 129910

Taupter : restricted modules and ubuntu modules are two packages which add drivers and modules to ubuntu. Most of laptops won't have sound working without these packages for your kernel, opening a new bug report for this is really not appropriate because you don't have necessary packages installed, this is not a bug. Alsa is the linux sound system, but this system won't use your sound card if the linux kernel does not have any drivers (modules) for it. Also, problem with sound cards is not a part of this bug which is about blank tty, this bug is closed. It would make more sense that you wait for the ubuntu-modules and restricted-modules to come for your kernel before opening a bug for this if the problem really persist.