From: Helge Hafting <helge.hafting@aitel.hist.no>
To: subramanyam yenugonda <subramanyamy@yahoo.co.in>
Cc: linux-kernel@vger.kernel.org
Subject: Re: opening the framebuffer device
Date: Tue, 12 Jul 2005 14:55:54 +0200 [thread overview]
Message-ID: <42D3BDDA.3050905@aitel.hist.no> (raw)
In-Reply-To: <20050711114712.95478.qmail@web8406.mail.in.yahoo.com>
subramanyam yenugonda wrote:
>Hi All!
>
>How to open the frame buffer device if user has
>multiple monitors on single video card.
>
>Thanks in advance.
>~YSM
>
>
You open the _correct_ framebuffer device.
Linux support multiple framebuffer devices, e.g.
/dev/fb0 /dev/fb1 /dev/fb2 ...
The matrox G550 support this, set the correct kernel config options
and you get both /dev/fb0 and /dev/fb1 (for the second head.)
This is the way to go if you want _independent_ monitors.
Some other drivers create a large framebuffer that spans several
monitors - ideal for the common case of one big desktop spread
across several monitors. In those cases, you open /dev/fb0,
and find the different monitor bitmaps at different offsets inside that
file.
Helge Hafting
prev parent reply other threads:[~2005-07-12 12:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-11 11:47 subramanyam yenugonda
2005-07-12 12:55 ` Helge Hafting [this message]
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