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Date: Thu, 19 Mar 2015 20:05:21 +0000
From: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
To: Michael Tokarev <mjt@tls.msk.ru>
Cc: Linux-kernel <linux-kernel@vger.kernel.org>,
        dri-devel@lists.freedesktop.org
Subject: Re: screen goes blank when loading gma500_gfx (atom D2500)
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> Yes, with video=LVDS-1:d boot parameter, kernel boots fine and there is
> graphics/video output on the screen, with the following message from kernel
> when loading gma500_gfx:
> 
> [    6.472859] [drm] forcing LVDS-1 connector OFF
> 
> (and a few others).
> 
> There's one funky thing still -- the screen size is not calculated correctly
> for the text (vga, d-sub) console, last text line is placed at about 3/4 of
> the screen size, with the rest - 1/4 - of the screen being blank.

I've seen that in one other case, where what was in fact happening was
that forcing the connector "off" was actually effectively leaving it as
the BIOS set it. What happens if you then use xrandr to change the
display sizes ?

Alan