Hi, I recently upgraded to a 27" monitor (2560x1440) from a 23" one (1920x1080), and had to switch to Windows because the new monitor is unusable in Linux. Today, about a month later, I decided to give Linux another try, since there have been several updates to the Intel graphics driver since then. Unfortunately, it seems that it's still unusable with xf86-video-intel 2.20.3 -- after a little while, the video signal to the 27" monitor completely stops, and it goes into power saving mode. I'm running dual monitors with the old 23", and that one continues running fine when this happens. This happens on my ThinkPad X220 (i5-2540M). The 27" is connected via DisplayPort, and the 23" via DVI. SNA is enabled, if it makes any difference (I haven't tried turning it off, but I probably should). This is the biggest problem I'm facing when it comes to Linux support. I also gave the new "TearFree" option a try, and while it does a great job of eliminating tearing, it makes the two monitors become mirrors of each other for some reason. If I take a screenshot with the GNOME tool, the screenshot comes out as expected (unmirrored), but the video output on the two monitors is mirrored in reality. Disabling "TearFree" fixes this. Also, when I'm using the ThinkPad's built-in display, it sometimes turns off for no apparent reason, although it's not too big of a deal since a suspend/resume cycle seems to fix things (and I haven't used 2.20.3 long enough to experience this yet). Any ideas/things I can do to help track these issues down? Thanks, Chun-Yu
