https://bugs.freedesktop.org/show_bug.cgi?id=104254

            Bug ID: 104254
           Summary: Modifiers ignored when key report has modifiers and a
                    keycode
           Product: Wayland
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: libinput
          Assignee: [email protected]
          Reporter: [email protected]

When a USB key report has a modifier + a key code, and such a modifier was not
previously reported, then the modifier gets ignored.

The issue does NOT occur in libinput 1.9.2, only since version 1.9.3

e.g.
    Key report with modifiers:  00000010 (Left shift) and keycode 0x04 (a)

    Expected: "A" (uppercase/shifted letter A)
    Obtained: "a" (lowercase letter a) - Left shift modifier gets ignored

This doesn't occur for all modifiers and all combination of letters. For
instance a pre-shifted "b" does output a "B" as expected, but fails for "d",
"e", etc.

This will hardly occur under normal conditions of course, the issue arises when
using a keyboard that attempts to send "pre-shifted" keys to allow symbols
typing on a single keystroke (without holding shift).

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