[Bug 108225] [LPT SPT KBP] Acer V3-772G screen brightness cannot be adjusted with i915.fastboot enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108225

--- Comment #46 from Maarten Lankhorst <bugs at mblankhorst.nl> ---
Backlight turning off during S4 hibernate is expected. The kernel performs all
steps of suspend. A whole snapshot of the memory is made. It then performs a
resume so all devices are accessible again, and then the memory snapshot is
written to disk. After this the system really shuts down.

This is probably what you're seeing when hibernating.

In the first patch to fix backlight on resume, can you change in intel_panel.c:
if (panel->backlight.enabled && conn_state->crtc) {

to:
if (panel->backlight.level && conn_state->crtc) {

?

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