[Bug 87171] 3.18: i855GM KMS regression

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87171

Ville Syrjala <ville.syrjala at linux.intel.com> changed:

           What    |Removed                     |Added
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             Status|ASSIGNED                    |NEEDINFO

--- Comment #8 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Bruno from comment #7)
> (In reply to Ville Syrjala from comment #6)
> > Can you try this 'intel_reg_write 0x20cc 0x40000' ?
> 
> This made no visual change, no any difference in intel_reg_dumper output.
> 
> On execution it reported old value of 0x4 and new value of 0x0.

So not trickle feed related.

> 
> Going to perform bisection unless you have some better/quicker suggestion.

I guess it wouldn't hurt to check the watermarks too. Any difference between
the kernels with this?
intel_reg_read -c 2 0x20d8

If that's not it either, then a bisect would be appreciated.

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