Date: Thu, 22 Nov 2012 17:49:06 -0500 From: Gary Palmer <gpalmer@freebsd.org> To: Kevin Oberman <kob6558@gmail.com> Cc: Adrian Chadd <adrian@freebsd.org>, freebsd-stable@freebsd.org, Ian Smith <smithi@nimnet.asn.au>, Alexander Motin <mav@freebsd.org>, Andriy Gapon <avg@icyb.net.ua>, Ronald Klop <ronald-freebsd8@klop.yi.org> Subject: Re: Increasing the DMESG buffer.... Message-ID: <20121122224906.GE88593@in-addr.com> In-Reply-To: <CAN6yY1v1AdhgqQfONbDAEueU2wnFZDO8GvegRzq10y0yoj8kDg@mail.gmail.com> References: <50AD0E82.3070706@digiware.nl> <20121121194142.8c4bf7d1977f13801a021ccc@getmail.no> <op.wn4141f88527sy@212-182-167-131.ip.telfort.nl> <CAJ-VmomREO6uj_izmD%2Bp90cFn=AQcz7UbZNkX8PVnU5mG_8ufQ@mail.gmail.com> <20121122144400.M21191@sola.nimnet.asn.au> <CAJ-Vmonk2RS=FwpgVHpeuFF5jf%2BSjE2Hv8kOFBrDCkv-=hTYSg@mail.gmail.com> <20121122213328.J21191@sola.nimnet.asn.au> <50AE36FF.7080106@FreeBSD.org> <CAJ-Vmo=UOTu0KG6yHjZ_gBB4HGSGNJOAhn3HT-8gNsh_=ih7Yg@mail.gmail.com> <CAN6yY1v1AdhgqQfONbDAEueU2wnFZDO8GvegRzq10y0yoj8kDg@mail.gmail.com>
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On Thu, Nov 22, 2012 at 02:14:59PM -0800, Kevin Oberman wrote: > On Thu, Nov 22, 2012 at 2:05 PM, Adrian Chadd <adrian@freebsd.org> wrote: > > On 22 November 2012 06:30, Alexander Motin <mav@freebsd.org> wrote: > > > >> Neither ICH, nor any other driver I know have amount of information > >> comparable to what HDA hardware provides. So the analogy is not good. > >> Respecting that most CODECs have no published datasheets, that information > >> is the only input for debugging. > >> > >> snd_hda also uses hw.snd.verbose=3. But it is used for even deeper driver > >> debugging. It also enables a lot of debugging in sound(4), that can be too > >> verbose for HDA debugging. > >> > >> I will recheck again how can it be reorganized, but I think that the real > >> problem is not in HDA. We need some way to structure and filter the output. > > > > I honestly would like to just see it spat out using a userland tool, > > rather than having the kernel print that level of topology data out. > > > > It's highly unlikely that a topology problem is going to cause a > > system to not boot, right? So the kernel itself doesn't need to be > > able to spit that data out. > > Maybe I'm missing something, but the data needed to adjust HDAC is > available from 'sysctl dev.hdaa'. I have not looked at the verbose > output in quite a while, but I think it is mstly or entirely hte > information in that and 'sysctl dev.hdac'. I never needed to look > elsewhere to get mine set up properly. > > Also, isn't the entire verbose boot captured in /var/run/dmesg? Only if the message buffer hasn't overflowed before the utility runs to populate the file Gary
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