[Bug 1653386] Re: Gamepad not recognized as joystick

[Dan Streetman]

** Changed in: systemd (Ubuntu)
       Status: New => Won't Fix

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Title:
  Gamepad not recognized as joystick

Status in systemd package in Ubuntu:
  Won't Fix

Bug description:
  I recently brought out my old bluetooth HID gamepad (iPEGA PG-9053)
  and was surprised to find that I didn't get any input in SDL games,
  though I know it used to work with older versions of Ubuntu
  (approximately 14.04 I think). KDE's "input devices" configuration
  would be able to perfectly read from /dev/input/js0 but many games
  failed to get any input from the gamepad.

  It turns out that the reason for this is that the event devices
  (/dev/input/event*) were not readable for the default Ubuntu user
  (crw-rw----, group=input).

  It seems that only devices that are marked as Joysticks will have
  global read permission set for them. This means that apparently my
  humble gamepad was not detected as such. The following is the udev
  info for my gamepad:

  $ udevadm info --name=input/event21
  P: /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5.3/2-1.5.3:1.0/bluetooth/hci0/hci0:12/0005:1949:0402.000A/input/input31/event21
  N: input/event21
  E: BACKSPACE=guess
  E: DEVNAME=/dev/input/event21
  E: DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5.3/2-1.5.3:1.0/bluetooth/hci0/hci0:12/0005:1949:0402.000A/input/input31/event21
  E: ID_BUS=bluetooth
  E: ID_INPUT=1
  E: ID_INPUT_KEY=1
  E: ID_INPUT_KEYBOARD=1
  E: ID_INPUT_MOUSE=1
  E: LIBINPUT_DEVICE_GROUP=5/1949/402/11b:00:1a:7d:0a:ba:28
  E: MAJOR=13
  E: MINOR=85
  E: SUBSYSTEM=input
  E: USEC_INITIALIZED=7821377694
  E: XKBLAYOUT=us,il
  E: XKBMODEL=pc105
  E: XKBOPTIONS=grp:alt_shift_toggle,grp_led:scroll
  E: XKBVARIANT=,

  
  $ udevadm test-builtin input_id /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5.3/2-1.5.3:1.0/bluetooth/hci0/hci0:12/0005:1949:0402.000A/input/input31/event21
  calling: test-builtin
  === trie on-disk ===
  tool version:          231
  file size:         7291492 bytes
  header size             80 bytes
  strings            1819268 bytes
  nodes              5472144 bytes
  Load module index
  Found container virtualization none
  timestamp of '/etc/systemd/network' changed
  timestamp of '/lib/systemd/network' changed
  Parsed configuration file /lib/systemd/network/99-default.link
  Created link configuration context.
  ID_INPUT=1
  capabilities/ev raw kernel attribute: 12001f
  capabilities/ev decoded bit map:
    bit    0: 000000000012001F
  capabilities/abs raw kernel attribute: 30627
  capabilities/abs decoded bit map:
    bit    0: 0000000000030627
  capabilities/rel raw kernel attribute: 103
  capabilities/rel decoded bit map:
    bit    0: 0000000000000103
  capabilities/key raw kernel attribute: 7fff000000070000 1000000000007 ff9f307ac1405fff febeffdfffefffff fffffffffffffffe
  capabilities/key decoded bit map:
    bit    0: FFFFFFFFFFFFFFFE
    bit   64: FEBEFFDFFFEFFFFF
    bit  128: FF9F307AC1405FFF
    bit  192: 0001000000000007
    bit  256: 7FFF000000070000
  properties raw kernel attribute: 0
  properties decoded bit map:
  ID_INPUT_MOUSE=1
  test_key: checking bit block 0 for any keys; found=1
  test_key: checking bit block 64 for any keys; found=1
  test_key: checking bit block 128 for any keys; found=1
  test_key: checking bit block 192 for any keys; found=1
  ID_INPUT_KEY=1
  ID_INPUT_KEYBOARD=1
  Unload module index
  Unloaded link configuration context.

  There is a similar bug for a different peripheral here:
  https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1332444

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