[Bug 70406] Can't turn on laptop screen without changing its resolution first

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70406

--- Comment #20 from reztho at archlinux.us ---
(In reply to comment #19)
> The only thing I can think of is that the ddx sets a value if we try to
> enable an output with a zero backlight. Will think about that some more.

Ok.

Well, I installed KDE finally. It behaves the same way as XFCE. 

And then I closed the KDE session and started XFCE. XFCE turned off the laptop
screen, keeping the external screen on as it should be. And again, the same
behaviour after trying to activate the laptop screen.

By the way, Chris, thanks for your support.

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