I have an HP Probook 6560b with updated BIOS version F.60 Rev.A (31 Mar 2015) and a Transcend SSD370 256GB SATA 3 SSD. On that I run Debian 8.1 with grub2 (not grub-efi).
The default setting in BIOS for "Max SATA Speed" is 3.0 Gbps, which is the speed of SATA 2. Both my laptop and the drive supports SATA 3. However, when I change the maximum speed to 6.0 Gbps, I get all sorts of errors when trying to boot into Linux. Changing that setting back fixes the problem, allowing me to write this question on the same laptop.
Strangely, the error is different every time I try to boot. Sometimes it is something about
video mode not found. Other times I get the
How can this be fixed, so that both the laptop and the SSD use SATA III, without reinstalling my distro?