[Bug 94985] [HSW] Severe screen flickering on external monitor after i915.enable_psr=1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94985

--- Comment #13 from yann <yann.argotti at intel.com> ---
(In reply to dnord from comment #12)
> (In reply to Jani Saarinen from comment #9)
> > Is this issue still seen with latest kernel?
> 
> As on kernel 4.8.12 I still have this bug on my setup (Thinkpad T440p,
> external monitor connected to VGA port). In my case it is triggered when two
> following conditions are satisfied:
> 1. i915.enable_psr=1 (current kernel default)
> 2. Setting SATA link_power_management_policy to min_power (automatically set
> by TLP when cable is disconnected)
> When i915.enable_psr=2 bug is NOT happening.

dnord, the following submitted patch
https://patchwork.freedesktop.org/patch/127188/ is going to set psr by default
because it's known to cause bugs -until we get proper fix. As a general rule,
we really don't recommend setting any i915 options to enable or disable
features.

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