[linux-dvb] semi-recent regressions in automatic loading of DVB modules

Lincoln Dale ltd at interlink.com.au
Fri Sep 8 02:05:19 CEST 2006


> I am happy to see that you and Andrew were able to determine that the
> problem with dvb_attach was due to an old version of module_init_tools,
> however, I am also very interested to hear about what was wrong with the
> vanilla 2.6.18-rc kernel, that lead you to install the newer modules
> from linuxtv.org .

i had two initial problems with 2.6.18-rc5 drivers:

1. initial problem was due to the DvICO card not being recognized correctly.
however, since then i found out what the issue was; something had put
"options cx88xx card=21" into /etc/modprobe.conf which caused my card to be
incorrectly identified (it is actually card #15 & is autodetected correctly
without any card= override).

2. analog bt848 card (used for ZoneMinder) would be getting overflow errors
& would be unreliable, eventually failing.  errors such as:
	bttv2: OCERR @ 3dcc5000,bits: OFLOW FDSR OCERR*
	bttv2: OCERR @ 3dcc5000,bits: HSYNC OFLOW FDSR OCERR*

i since ascertained that the HDD used for ZM recordings was operating in PIO
& not UDMA mode.  quite likely that any large amount of movement out in the
front yard (and hence recording activity) would trigger overruns.

my other reason for tip-of-tree was to start reverse-engineering SAA7162E &
i figured tip-of-tree was a better place to start from.
having said that, only Richard has that card at the moment

i will check with 2.6.18-rc5 drivers now.

> Richard Dale speaks of a problem that he had in 2.6.18-rc6 with his
> DViCO card...

Richard has a slightly different DvICO card - the 2x T-Plus models, whereas
i have the DviCO T-1 model (+ 2 other DVB + analog).


cheers,

lincoln.

> 
> http://linuxtv.org/pipermail/linux-dvb/2006-September/012639.html
> 
> ...Is this the same problem that you had experienced?  If not, could you
> provide some more information?
> 
> I tried 2.6.18-rc6 on my hardware last night and saw no such
> problems.... but if this is indeed a problem in 2.6.18, I'd like to find
> it right away.
> 
> Thanks,
> 
> Michael Krufky




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