At Tue, 28 Oct 2008 14:19:16 -0200, Luiz Fernando N. Capitulino wrote: > > Em Tue, 28 Oct 2008 17:07:42 +0100 > Takashi Iwai <tiwai@xxxxxxx> escreveu: > > | > Hi Takashi, > | > > | > If I have some process with the sound device opened in my eeepc > | > (say KDE's kmix) and try to power off the machine, for example with: > | > > | > # echo o > /proc/sysrq-trigger > | > > | > The machine will not power off. > | > | At which point does it stop? > | What shows alt-sysrq-t (or w) output? > > I'm wondering how to get that kind of output because everything > is disabled at that point (display inclusive). OK, then it's hard to see. A good news is that it goes at least fairly end point, thus likely no hanging task, etc. > | > But it does work if I remove the snd-hda-intel module before issuing > | > the echo above. > | > > | > This problem seems to be pretty popular among distros, I could find > | > it reported for Mandriva, Ubuntu and Fedora. > | > | Hmm, I haven't heard of unfixed issues. > > Well, these are the tickets I've found: > > https://bugzilla.redhat.com/show_bug.cgi?id=444115 > https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/126140 > https://qa.mandriva.com/show_bug.cgi?id=44752 Looking through the comments that the power-saving helps, the problem may disappear even without disabling the pci device. The power-saving doesn't involve with pci_disable_device() or changing the power-state of the controler. So, at least, the problem is either in the codec or the controller setup. Suppose you already use the power-saving and it solves the shutdown problem, could you set power_save_controller=0 option for snd-hda-intel, and check whether the shutdown still works or not? If the shutdown doesn't work with this option, it means that azx_stop_chip() is what would be needed. Anyway, I feel this is rather a BIOS issue, and not sure what is the best way to fix in the driver itself... Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
