Latest libwacom 2.0.0 makes input devices unresposive

So I’m running on the unstable branch, and today, my input devices were unresponsive on the login screen (sddm), could not even get to a TTY.
Booting into cli mode and starting Xorg manually exhibited the same unresponsiveness.

Wayland would not start due to a libwacom version mismatch, so it turns out that the latest libwacom version was the culprit.

Solution : Boot into CLI mode. Downgrade libwacom to 1.12, and reboot. Input devices should now work again.

I’m not sure if this is the best fix, but at least it works, so I just wanted to leave it somewhere in case in can help someone.

EDIT: more info about my system :

Manjaro KDE Plasma Edition, unstable branch

System:
  Kernel: 5.16.1-1-MANJARO x86_64 bits: 64 compiler: gcc v: 11.1.0
    parameters: BOOT_IMAGE=/boot/vmlinuz-5.16-x86_64
    root=UUID=c7efd223-eb35-452c-8ab3-e71d6d2baa2a rw apparmor=1
    security=apparmor resume=UUID=44be34b4-fd1b-40dc-a8f7-21afefa86901
    udev.log_priority=3 3
  Desktop: KDE Plasma 5.23.5 tk: Qt 5.15.2 info: latte-dock wm: kwin_x11
    vt: 1 dm: SDDM Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Desktop System: Gigabyte product: X570 AORUS ULTRA v: -CF
    serial: <superuser required>
  Mobo: Gigabyte model: X570 AORUS ULTRA v: x.x serial: <superuser required>
    UEFI: American Megatrends v: F31j date: 11/20/2020
Battery:
  Message: No system battery data found. Is one present?
Memory:
  RAM: total: 31.35 GiB used: 4.04 GiB (12.9%)
  RAM Report:
    permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: AMD Ryzen 7 3700X bits: 64 type: MT MCP arch: Zen 2
    family: 0x17 (23) model-id: 0x71 (113) stepping: 0 microcode: 0x8701021
  Topology: cpus: 1x cores: 8 tpc: 2 threads: 16 smt: enabled cache:
    L1: 512 KiB desc: d-8x32 KiB; i-8x32 KiB L2: 4 MiB desc: 8x512 KiB
    L3: 32 MiB desc: 2x16 MiB
  Speed (MHz): avg: 3423 high: 4339 min/max: 2200/4426 boost: enabled
    scaling: driver: acpi-cpufreq governor: schedutil cores: 1: 4128 2: 4318
    3: 2077 4: 2153 5: 4339 6: 3470 7: 3676 8: 2155 9: 4273 10: 3823 11: 4255
    12: 4090 13: 3457 14: 4291 15: 2100 16: 2171 bogomips: 115028
  Flags: 3dnowprefetch abm adx aes aperfmperf apic arat avic avx avx2 bmi1
    bmi2 bpext cat_l3 cdp_l3 clflush clflushopt clwb clzero cmov cmp_legacy
    constant_tsc cpb cpuid cqm cqm_llc cqm_mbm_local cqm_mbm_total
    cqm_occup_llc cr8_legacy cx16 cx8 de decodeassists extapic extd_apicid
    f16c flushbyasid fma fpu fsgsbase fxsr fxsr_opt ht hw_pstate ibpb ibs
    irperf lahf_lm lbrv lm mba mca mce misalignsse mmx mmxext monitor movbe
    msr mtrr mwaitx nonstop_tsc nopl npt nrip_save nx osvw overflow_recov pae
    pat pausefilter pclmulqdq pdpe1gb perfctr_core perfctr_llc perfctr_nb
    pfthreshold pge pni popcnt pse pse36 rapl rdpid rdpru rdrand rdseed rdt_a
    rdtscp rep_good sep sev sev_es sha_ni skinit smap smca sme smep ssbd sse
    sse2 sse4_1 sse4_2 sse4a ssse3 stibp succor svm svm_lock syscall tce
    topoext tsc tsc_scale umip v_spec_ctrl v_vmsave_vmload vgif vmcb_clean vme
    vmmcall wbnoinvd wdt xgetbv1 xsave xsavec xsaveerptr xsaveopt xsaves
  Vulnerabilities:
  Type: itlb_multihit status: Not affected
  Type: l1tf status: Not affected
  Type: mds status: Not affected
  Type: meltdown status: Not affected
  Type: spec_store_bypass
    mitigation: Speculative Store Bypass disabled via prctl
  Type: spectre_v1
    mitigation: usercopy/swapgs barriers and __user pointer sanitization
  Type: spectre_v2 mitigation: Full AMD retpoline, IBPB: conditional, STIBP:
    conditional, RSB filling
  Type: srbds status: Not affected
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: AMD Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT]
    vendor: Gigabyte driver: amdgpu v: kernel bus-ID: 0c:00.0 chip-ID: 1002:731f
    class-ID: 0300
  Device-2: Logitech Webcam C270 type: USB driver: snd-usb-audio,uvcvideo
    bus-ID: 3-6.2:4 chip-ID: 046d:0825 class-ID: 0102 serial: <filter>
  Display: x11 server: X.Org 1.21.1.3 compositor: kwin_x11 driver:
    loaded: amdgpu,ati unloaded: modesetting,radeon alternate: fbdev,vesa
    display-ID: :0 screens: 1
  Screen-1: 0 s-res: 3840x1080 s-dpi: 96 s-size: 1016x285mm (40.0x11.2")
    s-diag: 1055mm (41.5")
  Monitor-1: DisplayPort-0 res: 1920x1080 hz: 60 dpi: 92
    size: 531x299mm (20.9x11.8") diag: 609mm (24")
  Monitor-2: HDMI-A-0 res: 1920x1080 hz: 60 dpi: 92
    size: 531x299mm (20.9x11.8") diag: 609mm (24")
  OpenGL: renderer: AMD Radeon RX 5700 XT (NAVI10 DRM 3.44.0
    5.16.1-1-MANJARO LLVM 13.0.0)
    v: 4.6 Mesa 21.3.4 direct render: Yes
Audio:
  Device-1: AMD Navi 10 HDMI Audio driver: snd_hda_intel v: kernel
    bus-ID: 0c:00.1 chip-ID: 1002:ab38 class-ID: 0403
  Device-2: AMD Starship/Matisse HD Audio vendor: Gigabyte
    driver: snd_hda_intel v: kernel bus-ID: 0e:00.4 chip-ID: 1022:1487
    class-ID: 0403
  Device-3: Logitech Webcam C270 type: USB driver: snd-usb-audio,uvcvideo
    bus-ID: 3-6.2:4 chip-ID: 046d:0825 class-ID: 0102 serial: <filter>
  Device-4: C-Media Audio Adapter (Unitek Y-247A) type: USB
    driver: cmedia_hs100b,snd-usb-audio,usbhid bus-ID: 5-3.4:3
    chip-ID: 0d8c:0014 class-ID: 0300
  Sound Server-1: ALSA v: k5.16.1-1-MANJARO running: yes
  Sound Server-2: sndio v: N/A running: no
  Sound Server-3: PulseAudio v: 15.0 running: no
  Sound Server-4: PipeWire v: 0.3.43 running: yes
Network:
  Device-1: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel bus-ID: 05:00.0
    chip-ID: 8086:2723 class-ID: 0280
  IF: wlp5s0 state: up mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
    broadcast: <filter>
  IP v6: <filter> type: dynamic noprefixroute scope: global
  IP v6: <filter> type: noprefixroute scope: link
  Device-2: Intel I211 Gigabit Network vendor: Gigabyte driver: igb
    v: kernel port: f000 bus-ID: 06:00.0 chip-ID: 8086:1539 class-ID: 0200
  IF: enp6s0 state: down mac: <filter>
  IF-ID-1: docker0 state: down mac: <filter>
  IP v4: <filter> scope: global broadcast: <filter>
  IF-ID-2: virbr0 state: down mac: <filter>
  IP v4: <filter> scope: global broadcast: <filter>
  WAN IP: <filter>
Bluetooth:
  Device-1: Intel AX200 Bluetooth type: USB driver: btusb v: 0.8 bus-ID: 3-5:2
    chip-ID: 8087:0029 class-ID: e001
  Report: rfkill ID: hci0 rfk-id: 0 state: up address: see --recommends
Logical:
  Message: No logical block device data found.
  Device-1: luks-8e4618e5-1025-420c-ba28-9b661b4e55de maj-min: 254:0
    type: LUKS dm: dm-0 size: 1.82 TiB
  Components:
  p-1: sdb1 maj-min: 8:17 size: 1.82 TiB
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 5.91 TiB used: 1.03 TiB (17.3%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Samsung
    model: SSD 970 EVO Plus 1TB size: 931.51 GiB block-size: physical: 512 B
    logical: 512 B speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter>
    rev: 2B2QEXM7 temp: 46.9 C scheme: GPT
  ID-2: /dev/nvme1n1 maj-min: 259:5 vendor: Samsung
    model: SSD 970 EVO Plus 1TB size: 931.51 GiB block-size: physical: 512 B
    logical: 512 B speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter>
    rev: 2B2QEXM7 temp: 44.9 C scheme: GPT
  ID-3: /dev/sda maj-min: 8:0 vendor: Samsung model: SSD 860 EVO 500GB
    size: 465.76 GiB block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s
    type: SSD serial: <filter> rev: 3B6Q scheme: GPT
  ID-4: /dev/sdb maj-min: 8:16 vendor: Seagate model: ST4000DM004-2CV104
    size: 3.64 TiB block-size: physical: 4096 B logical: 512 B speed: 6.0 Gb/s
    type: HDD rpm: 5425 serial: <filter> rev: 0001 scheme: GPT
  Message: No optical or floppy data found.
Partition:
  ID-1: / raw-size: 896.71 GiB size: 881.64 GiB (98.32%)
    used: 180.01 GiB (20.4%) fs: ext4 dev: /dev/nvme1n1p2 maj-min: 259:7
    label: arch uuid: c7efd223-eb35-452c-8ab3-e71d6d2baa2a
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
    used: 1.7 MiB (0.6%) fs: vfat dev: /dev/nvme1n1p1 maj-min: 259:6 label: N/A
    uuid: 525B-F639
  ID-3: /media/gamedisk raw-size: 465.76 GiB size: 465.76 GiB (100.00%)
    used: 335.48 GiB (72.0%) fs: ntfs dev: /dev/sda1 maj-min: 8:1 label: Shared
    uuid: DC56C9A556C9812E
  ID-4: /run/timeshift/backup raw-size: 1.82 TiB size: 1.79 TiB (98.38%)
    used: 534.74 GiB (29.2%) fs: ext4 dev: /dev/dm-0 maj-min: 254:0
    mapped: luks-8e4618e5-1025-420c-ba28-9b661b4e55de label: backup
    uuid: d6ed5888-fb5c-4f49-b4df-49a473cce5c9
Swap:
  Kernel: swappiness: 60 (default) cache-pressure: 100 (default)
  ID-1: swap-1 type: partition size: 34.5 GiB used: 0 KiB (0.0%)
    priority: -2 dev: /dev/nvme1n1p3 maj-min: 259:8 label: N/A
    uuid: 44be34b4-fd1b-40dc-a8f7-21afefa86901
Unmounted:
  ID-1: /dev/nvme0n1p1 maj-min: 259:1 size: 100 MiB fs: vfat label: N/A
    uuid: B223-A72E
  ID-2: /dev/nvme0n1p2 maj-min: 259:2 size: 16 MiB fs: <superuser required>
    label: N/A uuid: N/A
  ID-3: /dev/nvme0n1p3 maj-min: 259:3 size: 930.9 GiB fs: ntfs label: N/A
    uuid: 00D424A5D4249EC2
  ID-4: /dev/nvme0n1p4 maj-min: 259:4 size: 511 MiB fs: ntfs label: N/A
    uuid: 48D0A848D0A83DD6
  ID-5: /dev/sdb2 maj-min: 8:18 size: 1.82 TiB fs: ntfs label: backup
    uuid: 12E471326822BEDD
USB:
  Hub-1: 1-0:1 info: Hi-speed hub with single TT ports: 6 rev: 2.0
    speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Device-1: 1-1:2 info: Integrated Express IT8297 RGB LED Controller
    type: Keyboard driver: hid-generic,usbhid interfaces: 1 rev: 2.0
    speed: 12 Mb/s power: 100mA chip-ID: 048d:8297 class-ID: 0301
  Hub-2: 1-6:3 info: Genesys Logic Hub ports: 4 rev: 2.0 speed: 480 Mb/s
    power: 100mA chip-ID: 05e3:0608 class-ID: 0900
  Hub-3: 2-0:1 info: Super-speed hub ports: 4 rev: 3.1 speed: 10 Gb/s
    chip-ID: 1d6b:0003 class-ID: 0900
  Hub-4: 3-0:1 info: Hi-speed hub with single TT ports: 6 rev: 2.0
    speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Device-1: 3-5:2 info: Intel AX200 Bluetooth type: Bluetooth driver: btusb
    interfaces: 2 rev: 2.0 speed: 12 Mb/s power: 100mA chip-ID: 8087:0029
    class-ID: e001
  Hub-5: 3-6:3 info: Genesys Logic Hub ports: 4 rev: 2.0 speed: 480 Mb/s
    power: 100mA chip-ID: 05e3:0608 class-ID: 0900
  Device-1: 3-6.2:4 info: Logitech Webcam C270 type: Video,Audio
    driver: snd-usb-audio,uvcvideo interfaces: 4 rev: 2.0 speed: 480 Mb/s
    power: 500mA chip-ID: 046d:0825 class-ID: 0102 serial: <filter>
  Device-2: 3-6.3:5
    info: Corsair CORSAIR K70 RGB MK.2 Mechanical Gaming Keyboard
    type: Keyboard,HID driver: hid-generic,usbhid interfaces: 2 rev: 2.0
    speed: 12 Mb/s power: 500mA chip-ID: 1b1c:1b49 class-ID: 0300
    serial: <filter>
  Device-3: 3-6.4:6 info: Razer USA Naga Trinity type: Mouse,Keyboard
    driver: hid-generic,usbhid interfaces: 3 rev: 2.0 speed: 12 Mb/s
    power: 500mA chip-ID: 1532:0067 class-ID: 0300 serial: <filter>
  Hub-6: 4-0:1 info: Super-speed hub ports: 4 rev: 3.1 speed: 10 Gb/s
    chip-ID: 1d6b:0003 class-ID: 0900
  Hub-7: 5-0:1 info: Hi-speed hub with single TT ports: 4 rev: 2.0
    speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Hub-8: 5-3:2 info: Super Top 4-Port hub ports: 4 rev: 2.0 speed: 480 Mb/s
    power: 100mA chip-ID: 14cd:8601 class-ID: 0900
  Device-1: 5-3.4:3 info: C-Media Audio Adapter (Unitek Y-247A)
    type: Audio,HID driver: cmedia_hs100b,snd-usb-audio,usbhid interfaces: 4
    rev: 1.1 speed: 12 Mb/s power: 100mA chip-ID: 0d8c:0014 class-ID: 0300
  Hub-9: 6-0:1 info: Super-speed hub ports: 4 rev: 3.1 speed: 10 Gb/s
    chip-ID: 1d6b:0003 class-ID: 0900
Sensors:
  System Temperatures: cpu: 16.8 C mobo: N/A gpu: amdgpu temp: 49.0 C
    mem: 48.0 C
  Fan Speeds (RPM): N/A gpu: amdgpu fan: 0
Info:
  Processes: 424 Uptime: 26m wakeups: 0 Init: systemd v: 250 tool: systemctl
  Compilers: gcc: 11.1.0 clang: 13.0.0 Packages: 1792 pacman: 1780 lib: 467
  flatpak: 12 Shell: Zsh v: 5.8 running-in: konsole inxi: 3.3.1

That is not a solution. Downgrading packages is not supported. However, temporarily downgrading a package that broke something may be necessary until the issue is resolved.

Without logs there’s no way to know what caused the problem. Please see: