[linux-dvb] Re: R: dvb-kernel slowness?

[Jeremy Hall <jhall@maoz.com>]

I too tested this and noted GREAT results.  Although channel switch 
sometimes takes longer, it always gets the right LNB (I am not using 
diseqc switching, rather echostar switching) I have noticed that with new 
drivers, performing the time-sensitive switching in userspace was prone to 
accidents, but since I applied this patch, I have been unable to switch to 
the wrong sat due to jitter in the polarity switching.  I strongly 
encourage you to clean this patch and commit to CVS if you haven't already 
done so.

_J

In the new year, Artur Skawina wrote:
> Barbini Uberto <Uberto.Barbini@ceda.polimi.it> (031201.172131,<1A4E530F40B6D3119E880050041D6DE00413012D@wntceda3.ceda.polimi.it>):
> > > > I tested it and it works very nice!
> > > 
> > > did you notice any improvement? what dvb hw?
> > 
> > I'm using vdr 1.2.6 with 2.6.0-test9 and dvb-kernel from cvs.
> > I have a tecnotrend dvb-s 1.3 (ves1x93 frontend).
> 
> which is the same as what i'm testing with.
> 
> > I'm using it for hours without any problem, and switching channels is as
> > fast as in old drivers.
> 
> i think the version i posted needed one more dvb_delay call in OutCommand,
> in order to be more reliable, but it was already more stable than the
> DVB-branch ever was.
> 
> > However I passed from test9 driver to cvs ones with your patch, and I noted
> > an remarkable improvement, but I didn't try cvs "unpatched".
> 
> > > Not in this form, i hope :) I'm still trying to improve it a 
> > > bit; i'll have
> > > to test a few other changes, but that requires watching tv 
> > > for some time, 
> > > which i don't have right now.. I'll try posting another patch 
> > > in a few days.
> > 
> > mmh, IMHO it's neat but I don't understand it ;))
> 
> it adds a small delay after most frontend writes - this made the
> transponder switching delay much more stable, ie without it sometimes
> a channel wouldn't lock for a second or two. With this patch vdr
> feels not worse than an analog receiver w/ diseqc on.
> 
> Thanks for testing,
> 
> artur
> 
> 
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