Have X always display only on VGA output?
mrmazda at earthlink.net
Fri Nov 29 00:23:28 PST 2013
On 2013-11-28 21:37 (GMT-0800) Sandeep composed:
What gfxchip do you have (output from 'lspci | grep VGA')?
Is there any video on the external display during boot? If so, exactly when
does it stop?
If what Matthias and Fernando suggested work, fine. If not, remember that X
can still be controlled via /etc/X11/xorg.conf*. KDE throws a fly in that
ointment in the form of Kscreen, so to make my suggestions work you'll need
in /etc/kde(4)/share/config/kdedrc if it exists, or create one if it doesn't,
for use at least until you get the no external output problem eradicated.
Next you'll need either
Which to choose is a matter of personal preference, but the combined content
of the three separates will be no different than that of the single.
Following may be all you need (subject to conforming the monitor-XXX string's
tail to match what you find in Xorg.0.log for your laptop's VGA output):
Identifier "Default Device"
Option "monitor-VGA1" "Default Monitor"
Identifier "Default Monitor"
Identifier "Default Screen"
Device "Default Device"
Monitor "Default Monitor"
If it doesn't work, device section might need also:
Option "monitor-LVDS" "Off"
or adding to the device section:
Option "monitor-LVDS" "LVDS"
Plus an additional monitor section:
Option "Ignore" "true"
See e.g.: http://www.thinkwiki.org/wiki/Xorg_RandR_1.2 &
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