[linux-dvb] Re: Transponder switching taking considerably longer

[Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de>]

Oliver Endriss wrote:
> 
> On Friday 25 July 2003 15:50, Klaus Schmidinger wrote:
> > I just switched to the latest (2003-07-25) CVS version of the DVB
> > driver, and much to my disappointment I had to realize that switching
> > between channels on different transponders now takes considerably
> > longer than with the DVB driver version dated 2003-07-13 which I have
> > been using for the past two weeks.
> >
> > I'm running the latest VDR 1.2.1. Switching between channels on the
> > same transponder is still as fast as it used to be, but as soon as
> > the transponder is changed it takes, I'd say, more than twice as long
> > as before. Oh, and there's no DiSEqC equipment involved, just a
> > simple multi-switch.
> >
> > Can anybody else confirm this?
> 
> No, I can't confirm this, but...
> ...I recently changed I2C bus speed from 10.3kHz to 275kHz to speed up
> tuning and I2C firmware downloads. At least it does for me. ;-)
> 
> Maybe this causes problems with some frontends if they need some delays
> between tuning and status check. Or they cannot handle the high speed
> reliably...
> 
> Try to change
>     SAA7146_I2C_BUS_BIT_RATE_120
> back to
>     SAA7146_I2C_BUS_BIT_RATE_3200
> in saa7146_core.c. Does it make a difference?

This results in

Jul 25 16:41:44 video kernel: DVB: AV7111(0) - firm f0240009, rtsl b0250018, vid 71010068, app 8000261a
Jul 25 16:41:44 video kernel: DVB: AV7111(0) - firmware supports CI link layer interface
Jul 25 16:41:45 video kernel: av7110(0): adac type set to 0
Jul 25 16:41:45 video kernel: Couldn't read from EEPROM: not there?
Jul 25 16:41:45 video kernel: Couldn't read from EEPROM: not there?
Jul 25 16:41:47 video kernel: DVB: AV7110(2) - firm f0240009, rtsl b0250018, vid 71010068, app 8000261a
Jul 25 16:41:47 video kernel: DVB: AV7110(2) - firmware supports CI link layer interface
Jul 25 16:41:47 video kernel: av7110(2): adac type set to 0
Jul 25 16:41:48 video kernel: Couldn't read from EEPROM: not there?

and the screen stays black (the OSD works, though).

Klaus


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