To: "firstname.lastname@example.org" <email@example.com>
Subject: xserver-xorg-input-wacom: starting X session results in permanent
Date: Wed, 8 Aug 2018 15:43:55 +0000
I own a Lenovo Thinkpad X201 Tablet laptop. When initializing an X session with this package, the video goes black and the keyboard is no longer functional. The only way to safely shutdown/reboot is via Magic Sysrq commands (ex: Raising Elephants Is So Utterly Boring).
On this same laptop, if the specified package is absent, the X session starts normally without tablet functionality.
Having encountered this issue on previous non-systemd distros, the solution is this command:
$ isdv4-serial-inputattach /dev/ttyS0
This command should be incorporated via a custom init script, by editing the Xsession/display manager init script, or something else as long as it's executed before X. To hide the output of this command and background, I modify the above command to:
$ isdv4-serial-inputattach /dev/ttyS0 > /dev/null 2>&1 &
Afterward running the above command, the X session launches successfully with tablet functionality.