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List:       freedesktop-xorg
Subject:    Multihead issues
From:       Steve Dodd <steved424 () gmail ! com>
Date:       2018-06-13 17:12:38
Message-ID: CAJ6XMjEsYgRruhogs1pEenu2yYD8cAqnLgAqo2tO5o7Nm4K+ew () mail ! gmail ! com
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I've hit this issue a number of times recently, and again today. Real
problems with multi-head configuration (*non* RandR) on intel & modesetting
at least .. Ubuntu 18.04 so xorg 1.19.6.

With intel(4) driver, after much guessing of CRTC numbers (would be really
good if xrandr(1) could print them!) I managed to get two multi-head
displays up, but the first/left-hand side was broken in all sorts of odd
ways, screen not refreshing properly, responding extremely slowly to input,
etc., etc.
Second display is fine - almost like the server itself was confused rather
than the gfx driver?
xorg.conf: https://pastebin.com/N7sR34J4

So I tried with modesetting(4) and can't even get it to see the second
display:

[  2090.926] (**) modeset(1): Option "ZaphodHeads" "1:HDMI-1"
..
[  2091.032] (WW) modeset(1): No outputs definitely connected, trying
again...
[  2091.032] (WW) modeset(1): Unable to find connected outputs - setting
1024x768 initial framebuffer
..
[  2091.032] (EE) modeset(1): No modes.

Same if I specify pipe 2.
Full Xorg.log here: https://pastebin.com/iACXeZGV
xorg.conf: https://pastebin.com/dhxihvKd

Thoughts appreciated!

Steve

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<div dir="ltr">I&#39;ve hit this issue a number of times recently, and again today. \
Real problems with multi-head configuration (*non* RandR) on intel &amp; modesetting \
at least .. Ubuntu 18.04 so xorg 1.19.6.<div><br></div><div>With intel(4) driver, \
after much guessing of CRTC numbers (would be really good if xrandr(1) could print \
them!) I managed to get two multi-head displays up, but the first/left-hand side was \
broken in all sorts of odd ways, screen not refreshing properly, responding extremely \
slowly to input, etc., etc.  </div><div>Second display is fine - almost like the \
server itself was confused rather than the gfx driver?</div><div>xorg.conf:  <a \
href="https://pastebin.com/N7sR34J4">https://pastebin.com/N7sR34J4</a><br></div><div></div><div><br></div><div>So \
I tried with modesetting(4) and can&#39;t even get it to see the second \
display:</div><div><br></div><div><div>[   2090.926] (**) modeset(1): Option \
&quot;ZaphodHeads&quot; &quot;1:HDMI-1&quot;</div><div>..</div><div>[   2091.032] \
(WW) modeset(1): No outputs definitely connected, trying again...<br></div><div>[   \
2091.032] (WW) modeset(1): Unable to find connected outputs - setting 1024x768 \
initial framebuffer</div><div>..</div><div>[   2091.032] (EE) modeset(1): No \
modes.</div></div><div><br></div><div>Same if I specify pipe 2.</div><div>Full \
Xorg.log here:  <a href="https://pastebin.com/iACXeZGV">https://pastebin.com/iACXeZGV</a></div><div>xorg.conf: \
<a href="https://pastebin.com/dhxihvKd">https://pastebin.com/dhxihvKd</a></div><div><br></div><div>Thoughts \
appreciated!</div><div><br></div><div>Steve</div></div>


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