Ah, one more detail: With the first 3.19.x kernels that I used, the SATA controller was detected as:
03:00.0 SATA controller: Broadcom Corporation (Wrong ID) Device 0224 (rev 10) Now (I discovered that 2 days ago, when I opened this bug, sorry for not mentioning), it is: 03:00.0 SATA controller: Lite-On Technology Corporation Device 0224 (rev 10) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1516215 Title: kernel 4.x has issues with lite-on sata controller in dell xps 13 (2015) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1516215/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
