linux-kernel - Re: screen goes blank when loading gma500

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Message-ID: <20140210104431.63f1a754@alan.etchedpixels.co.uk>
Date:	Mon, 10 Feb 2014 10:44:31 +0000
From:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
To:	Michael Tokarev <mjt@....msk.ru>
Cc:	Linux-kernel <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org
Subject: Re: screen goes blank when loading gma500_gfx (atom D2500)

> fbcon is loaded so it isn't an issue.
> 
> I tried 3.10 kernel initially (the above messages are from it), next
> I tried 3.13 kernel too, and that one behaves exactly the same.
> 
> As far as I remember, this system never worked with graphics well.
> Previous kernel (from which I updated) was 3.2 which had no
> gma500 module (local build).
> 
> What are the steps to debug this further?

Check you have X86_SYSFB and SIMPLEFB disabled

Boot with drm.debug=6

collect the logs

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