As you mentioned, I removed the "quiet splash" at boot screen (F6) and start the the installation. I did the complete installation and got no sound coming from the machine. So, to be sure, I redid the test by adding the "quiet splash" and the sound started to come back.
I verified the machine, there is no sound card, the sound is coming directly from the machine. The sound starts coming as soon as Ubuntu finishes to load and that the 2 icons appears "Examples" and "Install" -- Loud beep when installing feisty-desktop-i386 on DQ965COEKR motherboard https://launchpad.net/bugs/80535 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
