[Bug 1597415] Re: systemd-udevd: Error calling EVIOCSKEYCODE on device node '/dev/input/event9' (scan code 0x150, key code 190): Invalid argument

[Michael Doube]

This bug definitely depends on kernel version. Both the fix mentioned
above in #8
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1597415/comments/8
and mainline kernel after this commit (found with reverse bisect), are
required. Marking as linux bug. Would be very nice if fix could make it
into Ubuntu 16.04 LTS.

:~/linux/linux$ git bisect bad
e075b3c898e4055ec62a1f0ed7f3b8e62814bfb6 is the first bad commit
commit e075b3c898e4055ec62a1f0ed7f3b8e62814bfb6
Author: Pali Rohár <pali.rohar at gmail.com>
Date:   Wed Jun 15 21:49:13 2016 +0200

    dell-wmi: Generate one sparse keymap for all machines
    
    This patch reworks code for generating sparse keymap and processing WMI
    events. It unifies procedure for generating sparse keymap and also unifies
    big switch code for processing WMI events of different types. After this
    patch dell-wmi driver does not differ between "old" and "new" hotkey type.
    
    It constructs sparse keymap table with all WMI codes. It is because on some
    laptops (e.g. Dell Latitude E6440) ACPI/firmware send both event types (old
    and new).
    
    Each WMI code in sparse keymap table is prefixed by 16bit event type, so it
    does not change functionality on laptops with "old" hotkey support (those
    without scancodes in DMI).
    
    This allow us to distinguish between same WMI codes with different types in
    sparse keymap. Thanks to this WMI events of type 0x0011 were moved from big
    switch into sparse keymap table too.
    
    This patch also fixes possible bug in parsing WMI event buffer introduced
    in commit 5ea2559726b7 ("dell-wmi: Add support for new Dell systems"). That
    commit changed buffer type from int* to u16* without fixing code. More at:
    http://lkml.iu.edu/hypermail/linux/kernel/1507.0/01950.html
    
    Signed-off-by: Pali Rohár <pali.rohar at gmail.com>
    Tested-by: Michał Kępień <kernel at kempniu.pl>
    Reviewed-by: Michał Kępień <kernel at kempniu.pl>
    Tested-by: Gabriele Mazzotta <gabriele.mzt at gmail.com>
    Signed-off-by: Darren Hart <dvhart at linux.intel.com>

:040000 040000 babec68576f8756c9b0ee28a7ca7496de1c3c41a
b2e0e8cffb710d6ef2bdb9d4634cbd8b65867a34 M      drivers


** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1597415

Title:
  systemd-udevd: Error calling EVIOCSKEYCODE on device node
  '/dev/input/event9' (scan code 0x150, key code 190): Invalid argument

Status in linux package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  the symptom is this error message in my system's logs:

  juin 29 16:56:39 vougeot systemd-udevd[522]: Error calling
  EVIOCSKEYCODE on device node '/dev/input/event9' (scan code 0x150, key
  code 190): Invalid argument

  According to /proc/bus/input/devices the corresponding input device
  is:

  I: Bus=0019 Vendor=0000 Product=0000 Version=0000
  N: Name="Dell WMI hotkeys"
  P: Phys=wmi/input0
  S: Sysfs=/devices/virtual/input/input10
  U: Uniq=
  H: Handlers=kbd event9 
  B: PROP=0
  B: EV=13
  B: KEY=1000b00000400 0 e000000000000 0
  B: MSC=10

  This laptop is a Dell Latitude E6520.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: udev 229-4ubuntu6
  Uname: Linux 4.6.3-040603-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: KDE
  CustomUdevRuleFiles: 60-ssd-scheduler.rules
  Date: Wed Jun 29 17:43:01 2016
  EcryptfsInUse: Yes
  MachineType: Dell Inc. Latitude E6520
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.6.3-040603-generic root=UUID=749a9901-bdd3-4b5f-b80e-69414667e058 ro enable_mtrr_cleanup mtrr_spare_reg_nr=1 mtrr_gran_size=32M mtrr_chunk_size=128M quiet splash vt.handoff=7
  SourcePackage: systemd
  UpgradeStatus: Upgraded to xenial on 2016-04-09 (80 days ago)
  dmi.bios.date: 11/14/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A19
  dmi.board.name: 0NVF5K
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA19:bd11/14/2013:svnDellInc.:pnLatitudeE6520:pvr01:rvnDellInc.:rn0NVF5K:rvrA01:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6520
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1597415/+subscriptions