Bug#1143268: linux-image-6.12.100+deb13-amd64: HID++ devices broken, ghost keyboard events, systemd-modules-load failure

Package: linux-image-6.12.100+deb13-amd64
Version: 6.12.100-1
Severity: grave
Tags: regression
Regression: systemd-modules-load.service failure causes HID++ devices to 
fall back to hid-generic, resulting in broken input devices


  Debian Bug Report: linux-image-6.12.100+deb13-amd64


    Subject

Regression: systemd-modules-load.service failure causes HID++ devices to 
fall back to hid-generic, resulting in broken input devices and ghost 
keyboard events


    Package

linux-image-6.12.100+deb13-amd64


    Version

6.12.100-1


    Severity

grave (renders system unusable — keyboard/mouse non-functional)


    Tags

regression

------------------------------------------------------------------------


    Description

After upgrading from kernel 6.12.96+deb13-amd64 to 6.12.100+deb13-amd64, 
the system becomes effectively unusable due to broken HID input device 
initialization. The Logitech Unifying receiver (046d:c52b) fails to 
initialize with the specialized |hid_logitech_dj| and 
|hid_logitech_hidpp| drivers, falling back to |hid-generic|. This 
results in:

 1. Keyboard (Logitech ERGO K860) largely non-functional
 2. Mouse (Logitech MX Vertical) degraded functionality
 3. Ghost keyboard events (spurious KeyRelease and KeymapNotify events)
 4. Multimedia keys (volume, play/pause, track skip) completely
    non-functional
 5. Volume OSD appearing spontaneously without user input

Reverting to 6.12.96+deb13-amd64 immediately resolves all issues.


    Root Cause Analysis

The |systemd-modules-load.service| fails during boot with kernel 
6.12.100 because the NVIDIA kernel modules (|nvidia-current|, 
|nvidia-current-modeset|, |nvidia-current-drm|) are not found in 
|/lib/modules/6.12.100+deb13-amd64/|. This service failure appears to 
cascade, preventing or delaying the loading of other kernel modules 
including |hid_logitech_hidpp| and |hid_logitech_dj|.


      Evidence: Boot with 6.12.100 (BROKEN)

The Logitech Unifying receiver is detected only with the generic HID driver:

|kernel: input: Logitech USB Receiver as .../input/input13 kernel: 
hid-generic 0003:046D:C52B.0003: input,hidraw2: USB HID v1.11 Keyboard 
[Logitech USB Receiver] on usb-0000:00:14.0-12/input0 kernel: input: 
Logitech USB Receiver Mouse as .../input/input14 kernel: input: Logitech 
USB Receiver Consumer Control as .../input/input15 kernel: input: 
Logitech USB Receiver System Control as .../input/input16 kernel: 
hid-generic 0003:046D:C52B.0004: input,hiddev2,hidraw3: USB HID v1.11 
Mouse [Logitech USB Receiver] on usb-0000:00:14.0-12/input1 kernel: 
hid-generic 0003:046D:C52B.0005: hiddev3,hidraw4: USB HID v1.11 Device 
[Logitech USB Receiver] on usb-0000:00:14.0-12/input2|

Note: Individual devices (MX Vertical, ERGO K860) are *never enumerated 
by name*. The |logitech-djreceiver| and |logitech-hidpp-device| drivers 
are never invoked.


      Evidence: Boot with 6.12.96 (WORKING)

The specialized Logitech drivers load correctly:

|kernel: logitech-djreceiver 0003:046D:C52B.0005: hiddev2,hidraw2: USB 
HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:14.0-12/input2 
kernel: input: Logitech MX Vertical as .../input/input32 kernel: 
logitech-hidpp-device 0003:046D:407B.0006: input,hidraw3: USB HID v1.11 
Keyboard [Logitech MX Vertical] on usb-0000:00:14.0-12/input2:1 kernel: 
input: Logitech ERGO K860 as .../input/input33 kernel: 
logitech-hidpp-device 0003:046D:4088.0007: input,hidraw4: USB HID v1.11 
Keyboard [Logitech ERGO K860] on usb-0000:00:14.0-12/input2:2 kernel: 
logitech-hidpp-device 0003:046D:4088.0007: HID++ 4.5 device connected.|


      systemd-modules-load.service failure log (6.12.100)

|systemd-modules-load: modprobe: FATAL: Module nvidia-current not found 
in directory /lib/modules/6.12.100+deb13-amd64 systemd-modules-load: 
modprobe: ERROR: could not insert 'nvidia': Invalid argument 
systemd-modules-load: modprobe: FATAL: Module nvidia-current-modeset not 
found in directory /lib/modules/6.12.100+deb13-amd64 
systemd-modules-load: modprobe: ERROR: could not insert 
'nvidia_modeset': Invalid argument systemd-modules-load: modprobe: 
FATAL: Module nvidia-current-drm not found in directory 
/lib/modules/6.12.100+deb13-amd64 systemd-modules-load: Failed to insert 
module 'nvidia_drm': Invalid argument systemd-modules-load: Failed to 
find module 'vmmon' systemd-modules-load: Failed to find module 'vmnet' 
systemd[1]: systemd-modules-load.service: Main process exited, 
code=exited, status=1/FAILURE systemd[1]: Failed to start 
systemd-modules-load.service - Load Kernel Modules.|


      Additional kernel errors observed with 6.12.100

|kernel: pci 0000:00:1c.0: retraining failed kernel: EDAC sbridge: 
Failed to register device with error -19 kernel: ACPI BIOS Error (bug): 
Could not resolve symbol [\_SB.PCI0.SAT1.SPT0._GTF.DSSP], AE_NOT_FOUND 
kernel: ACPI Error: Aborting method \_SB.PCI0.SAT1.SPT0._GTF due to 
previous error (AE_NOT_FOUND)|


      Observed symptoms in desktop session (KDE Plasma 6.3.6 / Wayland)

When the system managed to boot (with degraded input), the following was 
observed via |xev|:

  * Spurious |KeyRelease| events for keys not pressed (e.g., |v|, |Return|)
  * Repeated |KeymapNotify| events with |keys: 130 0 0 0...| (bits 1 and
    7 of byte 0 stuck)
  * These events were NOT captured by |libinput debug-events|,
    confirming they originated from the generic HID layer, not from
    proper device enumeration
  * Volume OSD appeared spontaneously; |pactl subscribe| confirmed real
    sink volume changes on sink #67
  * Multimedia keys (volume, play/pause, track navigation) either
    non-functional or firing once then freezing


    Hardware

  * *Motherboard:* Gigabyte X99-UD5 WIFI (BIOS F24c, 2018-06-15)
  * *CPU:* Intel (Haswell-E/EP, 2399 MHz)
  * *RAM:* 96GB (6/8 slots populated)
  * *GPU:* NVIDIA GeForce GTX 1080 Ti (GP102)
  * *Keyboard:* Logitech ERGO K860 (PID: 4088) via Unifying receiver
  * *Mouse:* Logitech MX Vertical (PID: 407b) via Unifying receiver
  * *Unifying Receiver:* Logitech (046d:c52b) on USB 3-12
  * *Audio:* Realtek ALC1150 (analog surround 7.1)
  * *Webcam:* Microsoft LifeCam Studio
  * *WiFi:* Intel (iwlwifi)
  * *Desktop:* KDE Plasma 6.3.6 on Wayland
  * *Audio server:* PipeWire 1.4.2


    Steps to Reproduce

 1. Boot system with kernel 6.12.96+deb13-amd64 — all input devices work
    correctly
 2. Install and boot kernel 6.12.100+deb13-amd64
 3. Observe: keyboard/mouse via Logitech Unifying receiver are broken or
    severely degraded
 4. Revert to 6.12.96 — all issues resolved


    Workaround

Boot with kernel 6.12.96+deb13-amd64 and hold the 6.12.100 package:

|sudo apt-mark hold linux-image-6.12.100+deb13-amd64 sudo apt-mark hold 
linux-image-amd64|


    Additional Notes

Multiple rapid reboots were attempted with 6.12.100 (5+ boot attempts 
within ~10 minutes on 2026-07-31, visible in |journalctl --list-boots|), 
none of which resolved the issue. The problem is 100% reproducible on 
every boot with the affected kernel.

The ACPI errors and |LPM support broken| messages on SATA ports are also 
present but may be pre-existing on this X99 platform and not directly 
related to the HID regression. They are included for completeness.