After some digging in the upstream kernel, I found this commit:
-----------------------------------------------------------------------------
e0361b70175f0cd6199dd9ed6679632de73973d4
Input: wacom_w8001 - split the touch and pen devices into two devices
These devices have a pen device and a touch device through the same serial
protocol, split it up into two separate devices like we do for USB Wacom
tablets too.
Userspace already matches on the device name so we can't drop it
completely. Compose the same basename based on capabilities and append the
tool type, leading to a name like "Wacom Serial Penabled 2FG Touchscreen
Pen".
Note that this drops BTN_TOOL_FINGER, it is not needed once the tools
are split out (and a touch device with BTN_TOOL_FINGER is interpreted
as touchpad by most of userspace).
-----------------------------------------------------------------------------
It is the last recent of 5 commits which introduce changes to the W8001
serial driver.
It's just a guess - may be, the new device isn't considered for screen
rotation?
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https://bugs.launchpad.net/bugs/1645341
Title:
Wacom serial: Screen rotation triggers pen/eraser rotation but not for
finger touch
Status in xf86-input-wacom package in Ubuntu:
Confirmed
Bug description:
After updating to xenial the finger touch was broken. With an update
to yakkety the finger touch device came back, but it doesn't rotate
with the screen, how it used to in former releases. Pen and eraser are
rotated as expected.
I discovered, that the bug occurs only with linux kernels after 4.4,
so it depends on recent changes in the kernel.
The 'xsetwacom list devices' command generates the output:
Wacom Serial Penabled 2FG Touchscreen Pen stylus id: 15 type: STYLUS
Wacom Serial Penabled 2FG Touchscreen Finger touch id: 16 type: TOUCH
Wacom Serial Penabled 2FG Touchscreen Pen eraser id: 18 type: ERASER
... but with the old linux kernel from utopic (4.2.0) the ids are different:
15 for the stylus (unchanged), 17 for the eraser, 18 for finger touch
This bug affects:
* an updated system how described above
* a fresh installation of yakkety (used to file this bug)
* the zesty daily build
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: xserver-xorg-input-wacom 1:0.33.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
Uname: Linux 4.8.0-22-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Nov 28 15:10:21 2016
DistUpgraded: Fresh install
DistroCodename: yakkety
DistroVariant: ubuntu
InstallationDate: Installed on 2016-11-28 (0 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
MachineType: Hewlett-Packard HP EliteBook 2760p
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-22-generic
root=UUID=71701156-1f2c-4138-a7eb-0c16ea6b53d3 ro quiet splash
SourcePackage: xf86-input-wacom
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/27/2016
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68SOU Ver. F.62
dmi.board.name: 162A
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 05.41
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvr68SOUVer.F.62:bd05/27/2016:svnHewlett-Packard:pnHPEliteBook2760p:pvrA0005F02:rvnHewlett-Packard:rn162A:rvrKBCVersion05.41:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 2760p
dmi.product.version: A0005F02
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.13.0+16.10.20160818.2-0ubuntu2
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.70-1
version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.3-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.3-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-1ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20160706-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-2
xserver.bootTime: Mon Nov 28 14:32:58 2016
xserver.configfile: default
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.18.4-1ubuntu6
xserver.video_driver: modeset
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