At Wed, 29 Sep 2010 10:14:49 +0200, David Henningsson wrote: > > I'm researching a few bugs where the user claims position_fix=1 helps > the problem, but adding the quirk for that model surprisingly didn't. So > looking at the code, I concluded that the difference was > via_dmapos_patch, and that they all had via_dmapos_patch=1, and that > via_dmapos_patch=0 helped them solve the problem. Three out of five (not > all of them have reported back on via_dmapos_patch=0 yet) are VIA > controllers rev 10. > > So we now have VIA controllers that need via_dmapos_patch=0. > > I can think of a few approaches here: > > 1) since position_fix=1 implicitly sets via_dmapos_patch to 0 (maybe > unintentionally), we should add a position_fix=3 meaning lpib + > via_dmapos_patch=1 > > 2) figure if something has changed recently (as in "within the last > year"...) that has made via_dmapos_patch=1 work worse than before > > 3) figure out if there are several ATI/VIA controllers that actually > never wants the patch. > > Any thoughts? All sound as reasonable proposals. The 1 is easy. David, could you care to send a patch? 2 and 3 aren't trivial, but we can start by disabling via_dmapos for recent revisions. Since it can be controlled over a module option by the fix 1, it'll be easier to check the regression. thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
