Noodlez Posted February 4, 2016 Share Posted February 4, 2016 Hi, I just upgraded from an old Apple 23" Display which was connected via a DVI cable to my X99 system and didn't have any boot issue's at all. Since using my the new Dell U2515H display Ive now been having a problem with it going to sleep every time I boot up which is connected via its supplied mini displayport to displayport cable.As the system is booting after the apple logo a message appears saying "Entering Power Saving Mode" then it sleeps (but system is still running)Ive found that I have to turn the display off then on again to fix this issue, then all is working perfect.If I put the system to sleep it wakes up with no problem.... strange Also I've noticed that in the System Report/Graphics/Display section, it recognises the Dell U2515H and shows the correct resolution of 2560 x 1440, But shows @59 Hz instead of 60 Hz?...Everything else is running fine, sharp picture colours etc...I'm running El Capitan 10.11.2 with the latest Nvidia GPU Driver.My System Build is =Gigabyte UD4 X99 v1.1Intel 5820k i7 CPUEVGA Nvidia GTX 960 SuperSC ACX 2.0+Corsair RM750i PSUSamsung EVO 250GB SSD Please can anyone help?...Many ThanksNoodlez Link to comment Share on other sites More sharing options...
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