I have installed OpenSUSE Leap 15.1 on a Dell XPS 9560. I believe the touchpad is Synaptics. The touchpad did not work during installation nor after updates. If I open the Touchpad system settings program in KDE Plasma it says “No touchpad found”.
I tried updating the Kernel from 4.12 to 5.5.1-1 but this has made no difference. I also tried GRUB options such as “psmouse.synaptics_intertouch=0” but that did not work either. I had no such problems with Leap 15.0. Any suggestions?
Technically, that’s a kernel parameter rather than a grub parameter. Yes, you put it in the grub settings, so that grub will pass it along to the kernel.
Yes, it’s a Kernel parameter added to the start of the GRUB_CMDLINE_LINUX_DEFAULT line in /etc/default/grub.
However, I’ve now encountered a problem. When I added that parameter my system was booting using legacy boot and the old GRUB. I have since reinstalled my system with UEFI boot (and I believe GRUB2 for EFI), and now when adding that parameter the touchpad no longer works. Any ideas?