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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

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wrong assigned udev event (lemmy.ml)

submitted 1 year ago by beh_93825561489@lemmy.ml to c/linux@lemmy.ml

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basically each of the following: fn+f2 or fn+f3 (not even being recognised by evtest ) and the lid being closed or opened is being reported as "Event: time 1692812642.988180, type 1 (EV_KEY), code 238 (KEY_WLAN), value 1".

so I though about remapping "Event: time 1692812642.988180, type 4 (EV_MSC), code 4 (MSC_SCAN), value d7" as the closing lid thingy

the same for fn+f2 and fn+f3 (increase and decrease brightness) I have to remap this "Event: time 1692812647.457821, type 4 (EV_MSC), code 4 (MSC_SCAN), value ab" so my question is I can remap the keyboard here 60-keyboard.hwdb but where can I remap the ev_msc stuff

basically all this to say I want to tell udev that the msc this with id d7 is actually the toggle for closing the lid and the msc thing with id ab are actually the two buttons that increase and decrease brightness and yeah that's all

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[–] pastaq@lemmy.ml 2 points 1 year ago (1 children)

You will notice that every keypress in evtest is also preceded by a KEY_MSC. This is just the evdev responding to a scancode. If the hwdb has this scancode pre-assigned in 60-keyboard.hwdb then it creates the EV_KEY event that is mapped. What you want to do is turn this EV_MSC into an EV_KEY by mapping the unknown scancode to a evdev event code using the hwdb file.

The arch wiki has a good article on how to map these scancodes and identify what keycode you want to map. It is generic enough that it should work for most distros. Read all of section 2, it goes into specific detail about your question.

https://wiki.archlinux.org/title/Map_scancodes_to_keycodes#Using_udev

[–] beh_93825561489@lemmy.ml 1 points 1 year ago

thanks a lot that will certainly help