[Bug 10418] Powerbook DVI out only works when booted with monitor attached

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=10418





------- Comment #39 from agd5f at yahoo.com  2007-10-04 10:55 PST -------

> jfyi, since the sil1178 DS mentioned that the chip is used master/slave pairs
> if required for dual-link operation, I tried and also found a slave TDMS chip
> responding on i2c address 0x72 (or 0x39 if shifting away the r/w bit)
> 

you probably have a dual link tmds chip so it's probably the sil178.  

> it would be interesting to compare the sil1162 reset values for the registers,
> as those I get right now right after waking up again, match almost those of
> sil1178 but not exactly... (it's just a matter of two registers where one bit
> doesn't match the expected value...)

Despite what the databooks say for the default values, you may have to tweak
them on a case by case basis.  Each oem may program them slightly differently
depending on the application.


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