There seem to be two kernels there, so I tried them both: the touchscreen didn't work with either of them.
$ uname -a Linux flimsy 4.13.0-32-generic #35~lp1745342ConfigChange SMP Fri Feb 2 22:13:41 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
and
$ uname -a Linux flimsy 4.13.0-32-generic #35~lp1745342STMFTSdisabled SMP Fri Feb 2 20:23:08 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
There seem to be two kernels there, so I tried them both: the touchscreen didn't work with either of them.
$ uname -a nfigChange SMP Fri Feb 2 22:13:41 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
Linux flimsy 4.13.0-32-generic #35~lp1745342Co
and
$ uname -a MFTSdisabled SMP Fri Feb 2 20:23:08 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
Linux flimsy 4.13.0-32-generic #35~lp1745342ST