Two or three days ago I have purchased Dell U3415W, 34 inch curved monitor.
I have also opened this issue on official Dell forum : U3415W - Not recognized - Monitors Forum - Peripherals - Dell Community and they have sent me here since this is clearly Intel Graphics problem.
My HDMI recognizes the screen but the screen itself simply goes into power save mode, nothing is shown. Display Port is not even recognized or to say, monitor is not even shown anywhere under my Display properties.
I used a Dell diagnostic tool (please take a look at the link provided above) and in diagnostics its very clear that the issue is related to the GPU.
Model of my laptop is : Acer Aspire VN7-792G, latest laptop from Acer from Aspire series, it has two GPU's (Intel 530) and NVIDIA GEFORCE GTX 960M.
Since I'm desperate considering I payed 1100 euros for this screen and it doesn't work with this GPU, I have also ordered Thunderbolt 3 to Dual DisplayPort Adapter - 4k, 60 Hz | Video Converters | StarTech.com so I try with Thunderbolt 3 to Display Port, praying to all the forces for it to work.
SOME EXTRA INFORMATION
ci ci:ci ci:ci ci:CI CI:CI CI:CI CI:CI:CI CI - ErrorKey Search - On this error link you can check the error from Dell Diagnostic Tool.
http://en.community.dell.com/support-forums/peripherals/f/3529/t/19664456?pi23185=1 - Similar problem to mine on Dell XPS running same GPU
https://communities.intel.com/thread/44095?start=0&tstart=0 - Another link that could be useful
Please if you can anyhow help me to resolve this, it would really mean a world to me.
Alex aka agjs