Primary SSD on Dell Precision 7510 Cannot Be Detected by Ubuntu Installer
I was able to install both Ubuntu 14.04 and 15.10 on the Dell Precision 7510 (settled for Ubuntu 15.10 due to out-of-the-box Wireless driver support). In order for the installer to recognise the disk I went into the BIOS:
System Configuration -> SATA Operation -> Choose AHCI
Apply and Exit
That did the trick for me.