[Bug 104158] [CFL][regression][bisected] Black screen since 4.14.4

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104158

Rodrigo Vivi <rodrigo.vivi at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |NEEDINFO

--- Comment #28 from Rodrigo Vivi <rodrigo.vivi at gmail.com> ---
Chris, what you mean by "expected behaviour for your setup."
is because it seems the lack of stolen space?

[drm:i915_gem_object_create_stolen_for_preallocated [i915]] failed to allocate
stolen space

Probably something that needs to be adjustable on BIOS?

Comparing good x bad logs I just see that drm:drm_setup_crtcs()
is no longer called. Probably because drm_fb_helper_hotplug_event()
is not called anymore after this patch because it is protected now
by +    if (ifbdev->vma).

Do we really need to sync on this vma for this hotplug event?


jrq, 1. could you please check if you have ways to increase the stolen memory?
2. IF 1 doesn't solve, could you please check if by removing this 
-       if (ifbdev->vma).
before drm_fb_helper_hotplug_event() call would get things working for you
back?

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