blacklist all OSS sound cards just in case?

[Marc Poulhiès]

The DXR3 card doesn't have an ALSA driver, so we allow the OSS one to be loaded, but this knocks out the ALSA OSS emulation for this other sound card.

I'm not sure for which package I should file this bug, sorry if I'm wrong.
I have an Ubuntu breezy up to date installed on my computer (AMD K7). I have a SB Live! sound card and a DXR3 card. It seems that the module em8300 is loaded and a corresponding /dev/dsp file is created. The SB Live! works great with alsa, but OSS emulation doesn't: no /dev/dsp* is created for the card.
Blacklisting em8300 in /etc/hotplug/blacklist solves the problem and a working /dev/dsp is created.

I can provide more information if needed (lspci, lsmod, dmesg, ...)

Marc

[Scott James Remnant (Canonical) (canonical-scott)]

Could you provide the output of "lsmod" if you DON'T have this blacklist line ... and then output of "lsmod" if you do.

Sounds like an ALSA blacklist issue.

[Marc Poulhiès (marc-poulhies)]

output of lsmod when em8300 is blacklisted

[Marc Poulhiès (marc-poulhies)]

output of lsmod when em8300 is loaded at boot time after removing it from the blacklist

[Scott James Remnant (Canonical) (canonical-scott)]

Oh, I see, having this card means you get an OSS /dev/dsp ... which means the ALSA emulation doesn't work on your other card ... but there's no ALSA driver for your OSS card ... whee

[Scott James Remnant (Canonical) (canonical-scott)]

I'm going to reject this one ... we can't blacklist OSS drivers for which we don't have an ALSA alternative otherwise we'd just get "My DXR3 card doesn't work" bugs.

This is why the blacklist files are configuration files, so you can edit them if your machine needs something like this.