Subject: Re: Unable to mmap /dev/mem
To: Jared D. McNeill <jmcneill@invisible.yi.org>
From: Matthieu Herrb <matthieu@laas.fr>
List: tech-x11
Date: 11/13/2000 17:44:03
--YjhTy34M0C
Content-Type: text/plain; charset=us-ascii
Content-Description: message body text
Content-Transfer-Encoding: 7bit

You wrote (in your message from Monday 13)
 > On Mon, 13 Nov 2000, Matthieu Herrb wrote:
 > > In this case you need to use the aperture driver and to patch the
 > > application to try /dev/xf86 if /dev/mem fails.
 > 
 > The only place that '/dev/mem' is referenced to in the source of the
 > program is an open() call, to see if the device exists. XF86DGAGetVideo is
 > called just after. 'strings libXxf86dga.a | less' shows '/dev/mem', but no
 > '/dev/xf86'. Sounds like XF86DGAGetVideo doesn't have a choice; does this
 > mean our X server is broken?
 > 

Not the Xserver. The DGA library. Sorry I've never played with any DGA
application, so I didn't notice this problem.  We need to patch
xsrc/xc/lib/Xxf86dga/XF86DGA.c. If you have an xsrc tree, can you try
the following patch, rebuild/install in xc/lib/Xxf86dga 
and try again ?

If it works, it should probably be send-pr'd. 

				   Matthieu


--YjhTy34M0C
Content-Type: application/octet-stream
Content-Description: libXxf86dga patch
Content-Disposition: attachment;
	filename="diffs.dga"
Content-Transfer-Encoding: base64
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--YjhTy34M0C--