upgrade breaks Lenovo Yoga 730 input i2c-WCOM516B pen + touch + eraser X11 and Wayland

[Jordan Schaefer]

Errors visible in /var/log/Xorg.0.log. You can see the devices get disconnected once the pen enters the proximity of the screen (hover cursor). Uploaded example shows:

[ 15.106] (II) config/udev: Adding input device Wacom HID 516B Finger (/dev/input/mouse3)
[ 15.106] (II) No input driver specified, ignoring this device.

Reverting to 5.8.0-44-generic fixed this issue.

It is worth noting that the touch is an easy thing to miss when you don't own a Wacom pen or charged AAAA battery because the touch does not break until you whip out the pen.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.8.0-45-generic 5.8.0-45.51~20.04.1+1
ProcVersionSignature: Ubuntu 5.8.0-45.51~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-45-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 4 21:42:05 2021
InstallationDate: Installed on 2020-05-30 (309 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: linux-signed-hwe-5.8
UpgradeStatus: No upgrade log present (probably fresh install)

[Jordan Schaefer (umschalttaste)]

This is the diff between Xorg logs in versions 5.8.0-44-generic and 5.8.0-48-generic, the new errors are all this extra stuff at the very end.
> (II) modeset(0): EDID vendor "BOE", prod id 1780
> (II) modeset(0): Printing DDC gathered Modelines:
> (II) modeset(0): Modeline "3840x2160"x0.0 533.25 3840 3888 3920 4000 2160 2163 2168 2222 +hsync -vsync (133.3 kHz eP)
> (EE) event11 - MSFT0001:02 06CB:7F8F Touchpad: kernel bug: Touch jump detected and discarded.
> See https://wayland.freedesktop.org/libinput/doc/1.15.5/touchpad-jumping-cursors.html for details
> (**) Option "fd" "26"
> (II) event2 - Power Button: device removed
> (**) Option "fd" "29"
> (II) event5 - Video Bus: device removed
> (**) Option "fd" "30"
> (II) event9 - Video Bus: device removed
> (**) Option "fd" "31"
> (II) event1 - Power Button: device removed
> (**) Option "fd" "32"
> (II) event8 - Integrated Camera: Integrated C: device removed
> (**) Option "fd" "33"
> (II) event10 - MSFT0001:02 06CB:7F8F Mouse: device removed
> (**) Option "fd" "34"
> (II) event11 - MSFT0001:02 06CB:7F8F Touchpad: device removed
> (**) Option "fd" "37"
> (II) event4 - Ideapad extra buttons: device removed
> (**) Option "fd" "38"
> (II) event3 - AT Translated Set 2 keyboard: device removed
> (II) UnloadModule: "wacom"
> (II) systemd-logind: not releasing fd for 13:70, still in use
> (II) UnloadModule: "libinput"
> (II) systemd-logind: releasing fd for 13:67
> (II) UnloadModule: "libinput"
> (II) systemd-logind: releasing fd for 13:68
> (II) UnloadModule: "wacom"
> (II) systemd-logind: releasing fd for 13:71
> (II) UnloadModule: "wacom"
> (II) systemd-logind: releasing fd for 13:70
> (II) UnloadModule: "libinput"
> (II) systemd-logind: releasing fd for 13:75
> (II) UnloadModule: "libinput"
> (II) systemd-logind: releasing fd for 13:74
> (II) UnloadModule: "libinput"
> (II) systemd-logind: releasing fd for 13:72
> (II) UnloadModule: "libinput"
> (II) systemd-logind: releasing fd for 13:65
> (II) UnloadModule: "libinput"
> (II) systemd-logind: releasing fd for 13:73
> (II) UnloadModule: "libinput"
> (II) systemd-logind: releasing fd for 13:69
> (II) UnloadModule: "libinput"
> (II) systemd-logind: releasing fd for 13:66
> (WW) xf86CloseConsole: KDSETMODE failed: Input/output error
> (WW) xf86CloseConsole: VT_GETMODE failed: Input/output error
> (WW) xf86CloseConsole: VT_ACTIVATE failed: Input/output error
> (II) Server terminated successfully (0). Closing log file.

[Po-Hsu Lin (cypressyew)]

Hello Jordan,
there is a known issue for Wacom stylus with 5.8.0-45
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.8/+bug/1920632

Do you mind to give the kernel in -proposed pocket a try?
https://wiki.ubuntu.com/Testing/EnableProposed

Thanks

[Jordan Schaefer (umschalttaste)]

I can confirm that everything is back to normal again with 5.8.0-49-generic. It is good. Thank you.