At Wed, 19 Mar 2008 21:12:51 +0100, Prakash Punnoor wrote: > > Hi, > > I didn't test an earlier 2.6.25-rc kernel, as I had no working nvidia > driver... But the problem I am reporting happens before nvidia gets loaded. > > With 2.6.24.3 the ALSA driver didn't made any troubles for me. Stock kernel > and enable_msi=1 made the driver to get a timeout and go back to legacy IRQ. > > With patches from > http://kerneltrap.org/mailarchive/linux-kernel/2007/11/25/443612 > 2.6.24.x even works with MSI. > > Now with above 2.6.25-rc kernel regardless of using above patch, the kernel > _hangs_ now when trying to initialize ALSA. It is even so bad, that doing a > hw reset and trying to load patched 2.6.24 kernel causes ALSA to hang when > trying to enable MSI. I need to turn power off and then patched 2.6.24 with > MSI works again. > > 2.6.25-rc with ALSA Intel HDA _not_ forcing enable_msi causes it to boot. > > to summarize: > > 2.6.24 + patch + enable_msi=1: OK (and HDA MSI) > 2.6.24 + enable_msi=1: OK (and HDA legacy IRQ) > 2.6.24 + patch: OK (and HDA legacy IRQ) > 2.6.24: OK (and HDA legacy IRQ) > > 2.6.25-rc + patch + enable_msi=1: hang > 2.6.25-rc + enable_msi=1: hang > 2.6.25-rc + patch: OK (and HDA legacy IRQ) > 2.6.25-rc: OK (and HDA legacy IRQ) > > > I don't know whether something in Linux MSI support was changed having effect > on ALSA or whether the HDA driver has a regression. At least there is no big change regarding the IRQ handling in ALSA HD-audio driver since 2.6.24... Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
