Hardware is a Dell XPS laptop, xorg log reports "Integrated Graphics Chipset: Intel(R) Sandybridge Mobile (GT2)" Running a custom configured 3.7.2 based kernel, xf86-video-intel-2.20.17. I'm running the internal LVDS screen at 1080p and a Dell 2713HM monitor at 2560x1440 connected via display port. 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. 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. The screen usually goes black while there's a high 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. It *seems* to be less likely if I run the external display at a lower resolution. There's nothing that coincides with the screen going black in dmesg or the xorg log. I've had no problems with this monitor under Windows 7 (gaming, videos, etc). 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. Many thanks jonathan. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/intel-gfx/attachments/20130119/5c149864/attachment.html>
