Comment 0 for bug 126140

Binary package hint: kernel-image-2.6.22-8-generic-di

I chose to file this under the current Gutsy kernel, but this issue has plagued me since Dapper. Ever since Dapper my laptop wouldn't shut down properly. I would get the infamous "will not halt" message, but my computer would never completely shut down. Today I found the culprit: the snd_hda_module. If I manually remove this module (rmmod snd_hda_intel) before shutting down everything works perfectly. My laptop is a Toshiba Satellite A105-S2716.

I also came across a post from bug #43961 that confirms the same behavior. Coincidentally, he has the same model laptop I do.
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.15/+bug/43961/comments/157

My theory is that snd_hda_intel is either not being unload