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.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0; } 0 1 I have an external monitor connected to my Dell XPS 13 9350 laptop. Whenever I close my laptop lid, the laptop's monitor will turn off but the external monitor will stay on and become the primary monitor. I tested what happens when I close the lid without an external monitor and found out that there is a 20-30 second delay before the laptop will suspend. If I close the lid and open it again within 10-15 seconds, the laptop will not even lock. I am wondering if this delay is the reason why my laptop will not suspend with an external monitor? Someone with a similar computer asked a similar question here: Ubuntu 18.04 + Dell XPS 9360 = Suspension doe

0 $begingroup$ I wanted to know how we can find the mirror of an object across a curved line in the $XY$ plane, like a parabola. Along a straight line in the $XY$ plane the procedure is intuitive enough. But I assume we will have to see how the object is distorted, magnified/demaginified etc. for a curved mirror? Would the way we think about this be similar to how we think about objects placed in front of spherical mirrors? Is there a general, coordinate geometric procedure to do this for a mirror of any shape? analytic-geometry share | cite | improve this question asked Jan 17 at 13:06 learning learning