Mailinglist Archive: radeonhd (622 mails)

[Egbert Eich <eich@xxxxxxx>]

Hi Matt,

I've pushed a pile of fixes on Thrusday night which have fixed a load
of DDC problems. Unfortunately not all of them.
Do you see any other bits set in the  R5_DC_I2C_STATUS1 register?

Cheers,
        Egbert.

Matt Kraai writes:
 > Howdy,
 > 
 > I have the same problem on my MacBook Pro.
 > 
 > 
 > I think this is why the screen is blank: it's unable to read the EDID
 > data, which causes it to mark the panel as inactive, which causes it
 > to shut it down.
 > 
 > On my system, the I²C transfer to read the EDID data fails.  In
 > rhd5xxI2CStatus, when the R5_DC_I2C_GO bit is unset the R5_DC_I2C_DONE
 > isn't set either.  It seems to work on other systems, so I don't know
 > why it fails.
 > 
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