<blockquote class="gmail_quote" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">On Wed, Apr 4, 2012 at 6:34 AM, Calvin Harrigan <span dir="ltr"><<a href="mailto:charriglists@bellsouth.net">charriglists@bellsouth.net</a>></span> wrote:</blockquote>
<div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 4/3/2012 3:38 PM, Nick Rout wrote:<br>
<snip><div class="im"><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
I've had similar problems related to this chicken, egg issue. I even had a<br>
problem with getting the audio over the HDMI cable because of an errant<br>
edid. Both were fixed with the same solution. Extract the edid from your<br>
tv, save it to a file. Instruct xorg to use the file for the TV info,<br>
negating the need to ask the TV directly. If the TV is off this will return<br>
nothing, which will result in a blank screen when you finally turn on the<br>
TV. Detailed instructions can be found here:<br>
<a href="http://analogbit.com/fix_nvidia_edid" target="_blank">http://analogbit.com/fix_<u></u>nvidia_edid</a><br>
</blockquote>
<br>
Only works on nvidia AFAIK<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Luckily for you, you won't have to edit the edid data, recalculate checksums<br>
and the like. I had to do this to strip away the audio information provided<br>
by the TV, which prevented me using the TV the way I wanted to.<br>
<br>
</blockquote></blockquote></div>
Sorry, I forgot that critical piece of information. You did mention ATI.<br>
<br>
Might still be possible:<br>
Which driver are you using? fglrx or open source? The open source ones seem to work with the custom-edid opiton<br>
<a href="http://en.gentoo-wiki.com/wiki/Radeon#Custom_EDID" target="_blank">http://en.gentoo-wiki.com/<u></u>wiki/Radeon#Custom_EDID</a><br>
<a href="http://manpages.ubuntu.com/manpages/lucid/man4/radeon.4.html" target="_blank">http://manpages.ubuntu.com/<u></u>manpages/lucid/man4/radeon.4.<u></u>html</a><div class="HOEnZb"><div class="h5"><br>
<br>
<br>
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</div></div></blockquote></div><br><div><br></div><div>First thanks to everyone for your response and suggestions.</div><div><br></div><div>Unfortunately I use fglrx driver which doesn't have the CustomEDID option. The option is supported by the radeon opensource driver but not by fglrx. Sorry I missed to mention the fact I have the latest 12.2 Catalist driver installed (hoping ATI will solve the problem so I keep up to date) which I'm not sure is better than the radeon one but I get really smooth playback in Mplayer with gl/gl2 video output so I'm not really ready to switch over.</div>
<div><br></div><div>I can also confirm that including Modline in the xorg.conf doesn't work as pointed by Jean-Yves.</div><div><br></div><blockquote class="gmail_quote" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<span style>I found it best to disable DPMS power saving in xorg.conf:</span><br style><span style>Section "ServerFlags"<br></span><span style> Option "BlankTime" "0" # default 10 mins<br>
</span><span style> Option "StandbyTime" "0" # DPMS standby, default 10 mins<br></span><span style> Option "SuspendTime" "0" # DPMS suspend, default 10 mins<br>
</span><span style> Option "OffTime" "0" # DPMS off, default 10 mins<br></span><span style>EndSection</span></blockquote><div><br></div><div>Lawrence, I find your suggestions very interesting I can see you had battled this problem before :) I have the ServerFlags section already included in my xorg.conf but without any success. I have to check if I have the correct options set as given above though.</div>
<div><br></div><blockquote class="gmail_quote" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<span style>This is almost certainly the ATI radeon driver disabling any<br></span><span style>disconnected outputs. I had the same problem with an analog TV<br></span><span style>connected to TVout. I fixed it by adding this to xorg.conf:</span><br style>
<span style>Section "Device"<br></span><span style> # copy existing<br></span><span style> ....<br></span><span style> Option "ForceTVOut" "on"<br></span><span style> # The above is documented for the radeon driver<br>
</span><span style> # For fglrx use:<br></span><span style> Option "NoTV" "no"<br></span><span style>EndSection</span></blockquote><div><br></div><div>I'm certainly going to try this option!</div>
<div><br></div><blockquote class="gmail_quote" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<span style>sudo xrandr --output HDMI1 --auto</span></blockquote><div><br></div><div>This is exactly what I was looking for, a way to probe the HDMI output without removing/inserting the cable!</div><div><br></div><div>Thanks again guys, I'll try the things suggested tonight and report back.</div>
<div><br></div><div>Igor </div>