Bug#918295: sddm: deactivating Wi-Fi from SDDM login page deactivates trackpad

[Cédric Boutillier <boutil@debian.org>]

Package: sddm
Version: 0.18.0-1
Severity: normal

Dear Maintainer,

I have an HP EliteBook 820 Laptop with a separate button to switch
on/off Wi-Fi (xev reports: keycode 255 (keysym 0x0, NoSymbol)
When trying to switch on/off wifi from the sddm login screen, the
trackpad gets disabled (the on-screen logo is displayed). Pushing the
same button a second time doesn't switch back on the trackpad.

Once logged in inside KDE, I can switch on again the trackpad from KDE
(I set up even a keyboard shortcut for that), and the Wifi button
doesn't alter its state anymore, and fulfills only its function.

Sddm is somehow messing with the mapping for this special key.

Thanks in advance. Let me know if you need more information.

Cédric


-- System Information:
Debian Release: buster/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE= (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages sddm depends on:
ii  adduser                 3.118
ii  debconf [debconf-2.0]   1.5.69
ii  libc6                   2.28-4
ii  libgcc1                 1:8.2.0-13
ii  libpam0g                1.1.8-3.8
ii  libqt5core5a            5.11.2+dfsg-7
ii  libqt5dbus5             5.11.2+dfsg-7
ii  libqt5gui5              5.11.2+dfsg-7
ii  libqt5network5          5.11.2+dfsg-7
ii  libqt5qml5              5.11.2-3
ii  libqt5quick5            5.11.2-3
ii  libstdc++6              8.2.0-13
ii  libsystemd0             240-2
ii  libxcb-xkb1             1.13.1-2
ii  libxcb1                 1.13.1-2
ii  qml-module-qtquick2     5.11.3-2
ii  x11-common              1:7.7+19
ii  xserver-xorg [xserver]  1:7.7+19
ii  xvfb [xserver]          2:1.20.3-1

Versions of packages sddm recommends:
ii  haveged                         1.9.1-6
ii  libpam-systemd                  240-2
ii  sddm-theme-breeze [sddm-theme]  4:5.14.3-1+b1

Versions of packages sddm suggests:
ii  libpam-kwallet5           5.14.3-1
ii  qtvirtualkeyboard-plugin  5.11.2+dfsg-2+b1

-- debconf information:
* shared/default-x-display-manager: sddm
  sddm/daemon_name: /usr/bin/sddm