[systemd-bugs] [Bug 78408] New: USB and DMI keyboard mappings behave differently

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78408

          Priority: medium
            Bug ID: 78408
          Assignee: systemd-bugs at lists.freedesktop.org
           Summary: USB and DMI keyboard mappings behave differently
        QA Contact: systemd-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: ed.678901 at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: general
           Product: systemd

I was expecting the following two mappings to behave the same way:

keyboard:dmi:bvn*:bvr*:bd*:svn*:pn*:pvr*
 KEYBOARD_KEY_3a=leftctrl

keyboard:usb:v*p*
 KEYBOARD_KEY_70039=leftctrl

However, the USB mapping will only work if the existing key is remapped, e.g.

keyboard:usb:v*p*
 KEYBOARD_KEY_70039=leftctrl
 KEYBOARD_KEY_700e0=capslock

It looks like the behaviour for USB keyboards is a bug.

I have tested this with systemd-208-16.fc20.x86_64 on kernel versions
3.14.2-200.fc20.x86_64 and 3.11.10-301.fc20.x86_64, as well as with
systemd-212-3-x86_64 on 3.14.2-1-ARCH.

The hardware I used includes a couple of USB keyboards, an old PS2 keyboard,
and the ThinkPad T520 keyboard.

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