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I upgraded my xubuntu 13.10 to 14.04 recently. When I turn the monitor off and
on, it only shows "no input signal". I have to restart x to bring it back to
work. This never happened on 13.10.
Booting from xubuntu 14.04 livecd or a clean installion of xubuntu 14.04 gives
the same problem.
I tried xset dpms force off/suspend/standby, the monitor works fine after
resuming. So i suppose it's not dpms to blame.
My graphics card is Intel HD4600 and my monitor is Dell UP3214Q. The monitor is
connected with a displayport cable.
Enable or disable the displayport 1.2 setting of the monitor doesn't change
anything.
This issue does not occurs on another computer (with nVidia gfx card+Dell
U2713HM+DVI cable)
Reinstall 13.10 solved the problem.
** Affects: gnome-settings-daemon (Ubuntu)
Importance: Undecided
Status: New
** Tags: 14.04 black bot-comment intel screen trusty
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monitor shows black screen and "no input signal" after turning the monitor off
and on manually
https://bugs.launchpad.net/bugs/1313539
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Packages, which is subscribed to gnome-settings-daemon in Ubuntu.
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