[mythtv-users] 0.14 + VIA M1k + UDMA6 + full
duplex=prebufferingpause - FIXED
Mikhail D'Vane
mikhaildvane at hotmail.com
Sat Mar 27 22:59:41 EST 2004
Glad to hear it! You have no idea how many things I tried before I finally
found the answer. (Actually... maybe you do...). I know for a fact that
stepping 1 Nehemiah's are detected correctly. Perhaps those are the
only ones that actually work without the hack?
Please pass it along - it's a very frustrating problem and I don't believe
it's
widely known.
Mik
>From: "Scott Rowe" <mythgnomer at rowelab.com>
>Reply-To: Discussion about mythtv <mythtv-users at mythtv.org>
>To: "'Discussion about mythtv'" <mythtv-users at mythtv.org>
>Subject: RE: [mythtv-users] 0.14 + VIA M1k + UDMA6 + full
>duplex=prebufferingpause - FIXED
>Date: Sat, 27 Mar 2004 20:54:15 -0600
>
>Aha! Mikhail, that was indeed the issue. So it seems that both the 693 and
>695 have this bug.
>
>Anyone using any other version of the Nehemiah processor? If I can confirm
>this, I'll pass it along to the various epia wiki / HOWTO maintainers.
>(Assuming it's not widely known / already fixed.)
>
>691 = fine
>693 = broke
>695 = broke
>
>-Scott Rowe
>
> > -----Original Message-----
> > From: mythtv-users-bounces at mythtv.org
> > [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Scott Rowe
> > Sent: Friday, March 26, 2004 8:51 PM
> > To: 'Discussion about mythtv'
> > Subject: RE: [mythtv-users] 0.14 + VIA M1k + UDMA6 + full
> > duplex =prebufferingpause
> >
> >
> > > -----Original Message-----
> > > From: mythtv-users-bounces at mythtv.org
> > > [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Mikhail D'Vane
> > > Sent: Thursday, March 25, 2004 8:34 PM
> > > To: mythtv-users at mythtv.org
> > > Subject: RE: [mythtv-users] 0.14 + VIA M1k + UDMA6 + full duplex
> > > =prebufferingpause
> > >
> > > You probably have a stepping 3 of the Nehemiah processor.
> > > This processor (or perhaps the kernel support for it) does
> > not report
> > > mmx capabilities correctly.
> > >
> > > One of the directories in /proc will tell you your CPU stepping.
> > > (Sorry, not in front of any linux machine right now, so I
> > can remember
> > > exact directory - it's name is pretty obvious.)
> > >
> > > If you have a stepping 3, you need to hard code the edx
> > return value
> > > in the cputest.c file and recompile mythtv (or maybe just
> > > mythfrontend). You can find the exact information on what
> > to add to
> > > the cputest.c file if you search the archive for posts by me with
> > > "cputest.c" in them.
> > >
> > > (cputest.c is in the myth source code. If you go to the top level
> > > directory where you unpacked mythtv, just do "find -name
> > cputest.c" to
> > > get the path.)
> > >
> > > Hope this is your problem - I puzzled over it for *months* before
> > > stumbling onto the solution (Google is your friend - try "edx
> > > cputest.c epia" and you'll find the info I did.)
> > >
> > > Mik
> >
> >
> >
> > Actually, cpuid is 695 (stepping = 5).. So it may not just be
> > 693 that has this problem (forgot to mention that I'd looked
> > at this, but since it was 695, I ignored it.)
> >
> > [root at mythbox root]# cat /proc/cpuinfo
> > processor : 0
> > vendor_id : CentaurHauls
> > cpu family : 6
> > model : 9
> > model name : VIA Nehemiah
> > stepping : 5
> > cpu MHz : 999.838
> > fdiv_bug : no
> > hlt_bug : no
> > f00f_bug : no
> > coma_bug : no
> > fpu : yes
> > fpu_exception : yes
> > cpuid level : 1
> > wp : yes
> > flags : fpu de pse tsc msr mtrr pge cmov mmx fxsr sse
> > bogomips : 1992.29
> >
> > I'll recompile anyway with the fix in place, and if it does
> > turn out to be the issue, I guess the stepping 5 version also
> > has the same issue as the 3.
> >
> > Live and learn!
> >
> > Thanks,
> > -Scott
> >
> >
> >
>
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