At Tue, 28 Oct 2008 16:44:33 -0200, Luiz Fernando N. Capitulino wrote: > > Em Tue, 28 Oct 2008 17:51:30 +0100 > Takashi Iwai <tiwai@xxxxxxx> escreveu: > > | 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. > > Yes, power_save_controller=0 doesn't work while the power-saving > one works. OK, then could you check which call in azx_stop_chip() is critical? You can comment out each and check the difference. > Where should I put a call to azx_stop_ship()? I'm not an alsa > hacker. :) This is the problem. If it's a fast call like azx_int_clear() or azx_int_enable(), it can be relatively easily done at each time. But, it's like freeing memories, it shouldn't be done at each operation. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
