Hello
The file /usr/share/doc/udev/README.keymap.txt.gz describe steps to find the
udev key mapping for your device. And if you find the correct keymap, the file
also details how you can submit your keymap to the udev developers and fix the
keyboard for all matching laptops in the future.
I don't have the exact same Sony VPC model (VPCCB4C5E) as the others
mentioned in this bug.
Steps to fix keymap (that I used)
1. Find keyboard input device:
$ /lib/udev/findkeyboards
----
AT keyboard: input/event2
module: input/event3
----
The keys you are fixing might be from either of the devices, so you
should do the following steps for each device.
2. Find scan codes:
$ /lib/udev/keymap -i input/event3 # And press the key(-combo) you are
fixing, I pressed fn+f1
---
Press ESC to finish, or Control-C if this device is not your primary
keyboard
scan code: 0x0C key code: f21
---
The scan code here (0x0C) is wrong! (At least on my system). You have to
substract 7 from the code
to get the usable value (for the keymap): 0x0C - 7 = 0x05
3. Find the key code:
/usr/include/linux/input.h
Search for the constants: "KEY_" and convert the rest to lowercase:
KEY_F21 > f21
KEY_BRIGHTNESSDOWN > brightnessdown
Touchpad toggle: Do not use the KEY_touchpad_toggle. Instead use the f21 for
toggling touchpad.
This took me a long time to figure out.
4. Construct the keymap: /etc/udev/keymaps/module-sony-vpc
Look at /lib/udev/keymaps/module-sony-vgn (or the attached module-sony-vpc)
as an example.
The format is:
<scan code> <key code>
eg.
0x05 f21
0x0A brightnessdown
5. Build the udev rule. The udev rule matches the laptop and execute the keymap
on boot. My attached rule: sony-vpc.conf
should match all Sony VPC laptops: The "VPC*" pattern should match
/sys/devices/virtual/dmi/id/product_name
6. The result should be:
/etc/udev/keymaps/module-sony-vpc
/etc/udev/rules.d/sony-vpc.rules
** Attachment added: "sony vpccb... keymap"
https://bugs.launchpad.net/ubuntu/+source/udev/+bug/939868/+attachment/3253278/+files/module-sony-vpc
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https://bugs.launchpad.net/bugs/939868
Title:
Sony VPCEL2S1E, some hotkeys not working
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