Subject: xserver-xorg-input-wacom: starting X session results in permanent black screen

From: Shane Kimble <[email-masked]>
Date: Wed, 8 Aug 2018 15:43:55 +0000

Package: xserver-xorg-input-wacom
Version: 0.34.0-1

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.

---

From: Mark Hindley <[email-masked]>
Date: Wed, 8 Feb 2023 14:58:21 +0000

Control: tags -1 debian moreinfo

Shane,

Sorry for the extreme delay with this.

> $ isdv4-serial-inputattach /dev/ttyS0

Is this manual step still required or do the updated udev rules handle it?

If it is still necessary could you report it to Debian's BTS? Devuan doesn't
fork xf86-input-wacom and we use Debian's packages directly without
recompilation. So the fix should be included there.

Thanks.

Mark