According to modem/README.Debian, the speaker does not work (and is unsupported) when the package is built with ALSA support (which appears to be the case, judging from your buildlog posted in bug 53014).
For speaker support, use the proprietary binaries. Remove SUPPORT_ALSA=1 from debian/rules, and rebuild. If not, does your modem otherwise work? -- Modem silent https://launchpad.net/bugs/75553 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
