I have a new Dell XPS15 which came with Windows 10 preinstalled. I completely wiped it and installed Slackware Linux. I can only run Linux in UEFI Secure Boot OFF Mode or Legacy Mode. When I start my laptop in Legacy Mode, the SSD drive gets mounted, but the bios says it cannot recognize my battery charger and refuses to charge the battery. When I run in UEFI Secure Boot OFF, charger is recognized but my SSD(Samsung) does not get mounted - i.e. it does not show as an option in devices to boot from and if I boot SlackWare from USB drive fdisk does not show the SSD drive. My bios version is 01.00.07. Can anyone suggest a fix? If possible, I would like to avoid updating the bios as it is very risky.
I found the answer - you need to switch RAID to AHCI for the SATA operation. This way you can boot in UEFI Secure Boot OFF and get the SSD mounted. Check this http://ubuntuforums.org/showthread.php?t=2301071&page=2