Comment # 14 on bug 954532 from Takashi Iwai

Thanks.  I haven't found so much difference in elantech code between 4.1 and
4.3.
This makes me wonder whether 4.3 would work in the input dev level.

Please try boot 4.3 kernel and test just like 4.1 kernel, i.e. with acpi=off
and evtest.  Do you still see difference from 4.1?  Also, try with normal boot
(with i8042.nopnp) but test with evtest.  How about this?

For installing a kernel package, just run like
   zypper in --oldpackage kernel-*.rpm

This will work in most cases without changing anything else.  For recovering
4.3, run zypper again like
   zypper in -f -r repo-oss kernel-default
supposing repo-oss is the main TW repository.

For booting without X, just put "3" to the boot option, which means to boot in
runlevel 3 in the old manner of sysv.

Last but not least: the problem with blackscreen on Leap kernel is also
interesting.  For that, try to boot with nomodeset boot option.  This will keep
UEFI framebuffer mode without native graphics driver.