<div dir="ltr"><div>Hardware is a Dell XPS laptop, xorg log reports "Integrated Graphics Chipset: Intel(R) Sandybridge Mobile (GT2)"<br><br><div>Running a custom configured 3.7.2 based kernel, xf86-video-intel-2.20.17.<br>
</div><div><br></div>I'm running the internal LVDS screen at 1080p and a Dell 2713HM monitor at 2560x1440 connected via display port.<br><br>Both
screens run fine when X starts, but at some point the external monitor
will go black. The system doesn't recognize it as being disconnected -
no KDE popup asking if I want to change the monitor config as happens
when pulling the DP or power on the monitor.<br>
<br>Sometimes it will return to life after a short amount of time,
most of the time it stays black indefinitely. A full power cycle of the
monitor (pulling the plug) will usually bring it back to life, but
typically not for long.<br>
<br>The screen usually goes black while there's some degree of
display activity - a video playing, moving large windows around the
screen, looking around in google streetview, etc. It doesn't seem to
matter which screen the activity is on.<br><br></div>It *seems* to be less likely if I run the external display at a lower resolution.<br>
<br><div>There's nothing that coincides with the screen going black in dmesg or the xorg log.<br></div><div><br></div><div>I've had no problems with this monitor under Windows 7 (gaming, videos, etc).<br></div>
<div><br></div>What I'm looking for: ideally a simple fix :)
Otherwise, any suggestions about where to look to gather more
information on what could be happening here - or other places to ask for
help.<br><br>
Many thanks<div><div><img src="https://mail.google.com/mail/u/0/images/cleardot.gif"><br></div><div>jonathan.<br></div></div></div>