Hi Daniel, hi Ville,
as promised, I was recently able to borrow an X30 that - similar to the
R31 - features the intel DVO VCH. As Ville mentioned, this notebook
suffers from bug #49838, namely the screen is blank after a resume from
suspend.
With some debugging, I was able to resolve this problem. The bug here is
that the bios of the X30 apparently forgets to re-initialize the
registers of the DVO; especially, the PLL remains uninitialized and the
panel output timing remains unitialized. No miracle the panel remains blank.
I added a bit of code that reads the registers of the DVO upon
initialization (hopefully correctly installed by the DVO) and resets the
DVO when installing a mode.
This fixes bug #49838.
I still have to cleanup the code and test the code on the R31 (which
also sits here).
I have to travel a bit in the next days, so it's probably not going to
be ready this week, but at least it is another 830-related bug resolved.
Greetings,
Thomas
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