I just bought the latest Dell XPS 12 (Haswell) and really love it. The only problem I'm having is that when I leave it in sleep mode for more than 2 hours, it wont wake from sleep: the keyboard illuminates but the screen remains black. Pressing any key will not turn on the screen. I am forced to hold the power button until the keyboard lights turn off and then turn the laptop on as usual. I'm afraid that this will wear out the power button slider. Am I doing something wrong?
Disable Intel Rapid Start
Didn't know what I was getting into until I started reading these Dell Forums. Just want to report that I have both these issues on recent new laptop.
XPS 12 9Q33 with i7 4510U CPU. Intel released that CPU recently in Q2 2014. This suggests this laptop model line is still suffering from wake from sleep blank screen & image retention issues that a lot of others have reported from over 1 year ago.
Wake from sleep issues - XPS 12 9Q23
Wake from sleep issues - XPS 12 9Q33 Haswell CPU
7/2013 Dell A02 BIOS acknowledging wake from sleep issue with possible fix, but even the newest A06 BIOS doesn't fix the issue to this day 8/2014.
Screen Image Retention - XPS 12 9Q23, 9Q33
http://en.community.dell.com/support-forums/laptop/f/3518/t/19497269.aspx (66+ pg of complaints)