[Openchrome-users] CN700 problems.

[Benno Schulenberg]

Christiaan van Dijk wrote:
> Tried different cables and 3 power supplies (60W brick+DC-DC,
> standard ATX and now 140W brick+DC-DC), verified voltages with a
> meter and scope, nothing strange. Also checked if all ground
> connections of the main board and supply are well grounded, also
> no problem there.

Okay, that was pretty thorough.  Together with the post by Mark 
Zimmerman, this begins to look like a timing problem on the board 
itself.  Or at least some interaction between X or drm and the 
board.  If it also happened with vesa, it's unlikely to be a driver 
problem, vesa or openchrome.

> Anyway I don't suspect the drive anymore, when using the stable
> configuration (ver. 255, DRI disabled in xorg.conf) there are no
> more problems.

Have you tried the combination DRI enabled, and DMA on the drive 
disabled?  If the hangs don't happen then, it's almost certain that 
the fault lies in the drm.

Benno