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hwdb: update format description and document reloading
https://bugs.freedesktop.org/show_bug.cgi?id=82311
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@ -28,19 +28,33 @@
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# driver, <vendor> is the firmware-provided string exported
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# by the kernel DMI modalias.
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#
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# Scan codes are specified as:
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# KEYBOARD_KEY_<hex scan code>=<key code identifier>
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# The scan code should be expressed in hex lowercase and in
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# full bytes, a multiple of 2 digits. The key codes are retrieved
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# and normalized from the kernel input API header.
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# Scan codes are specified as:
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# KEYBOARD_KEY_<hex scan code>=<key code identifier>
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# The scan code should be expressed in hex lowercase. The key codes
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# are retrieved and normalized from the kernel input API header.
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#
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# A '!' as the first charcter of the key identifier string
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# will add the scan code to the AT keyboard's list of scan codes
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# where the driver will synthesize a release event and not expect
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# it to be generated by the hardware.
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# An '!' as the first character of the key identifier string
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# will add the scan code to the AT keyboard's list of scan codes
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# where the driver will synthesize a release event and not expect
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# it to be generated by the hardware.
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#
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# To debug key presses and access scan code mapping data of
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# an input device use the commonly available tool: evtest(1).
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#
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# To update this file, create a new file
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# /etc/udev/hwdb.d/70-keyboad.hwdb
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# and add your rules there. To load the new rules execute (as root):
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# udevadm hwdb --update
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# udevadm trigger /dev/input/eventXX
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# where /dev/input/eventXX is the keyboard in question. If in
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# doubt, simply use /dev/input/event* to reload all input rules.
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#
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# If your changes are generally applicable, open a bug report on
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# http://bugs.freedesktop.org/enter_bug.cgi?product=systemd
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# and include your new rules, a description of the device, and the
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# output of
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# udevadm info /dev/input/eventXX
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# (or /dev/input/event*).
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##########################################
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# Acer
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