[Bug 31339] HP/Compaq 8510w HDMI port only works when booted with monitor attached

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=31339

--- Comment #7 from Tyson Whitehead <twhitehead at gmail.com> 2010-11-02 18:42:57 PDT ---
Created an attachment (id=40002)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=40002)
Diff of pre- and post-suspend constant registers

Result of diffing the output of

- booting up with DVI display attached (and working fine),
- doing 100 dumps of the registers between 0x6000-0x8000 after Xorg starts,
- filtering out any registers that do not remain constant

and

- suspending and resuming (display no longer working fine),
- doing 100 dumps of the registers between 0x6000-0x8000 after Xorg starts,
- filtering out any registers that do not remain constant

attached.

Nothing stands out to me here looking these up the RV630 register reference. 
It pretty much just looks like some memory map addresses have changed and some
of the I2C control register have been (mostly) just reset to defaults.

I would be happy to query the I2C buses as well if there are some instructions
somewhere on how to do that.

Thanks!  -Tyson

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