main/postmarketos-mkinitfs: Correctly set up udev

This replaces the previous udevadm test hack with a combination of udevd, udevadm trigger and udevadm settle in order to coldplug all available devices and make them available for use via libinput / unl0kr.

Possibly fixes #1411 (comment 895465028).

To test, run

pmbootstrap install --fde --add unl0kr
pmbootstrap qemu

and verify that keyboard / mouse input works in unl0kr.

Background

The previous udevadm test workaround worked for most but apparently not all people. The test command is also explicitly marked as a debug tool, not meant to be used in production. Using the debug shell, I noticed that even after running udevadm test, libinput list-devices gave no output and libinput debug-events /dev/input/event... failed, claiming that the device had not been set up by udev yet.

Researching how we set up udev after the initfs phase, I found that the setup-udev script starts a number of RC services that combine udevd, udevadm trigger and udevadm settle.

After calling this series of commands in the debug shell, both libinput list-devices and libinput debug-events started working as expected.

added 1 commit

• 9123d776 - main/postmarketos-mkinitfs: Correctly set up udev

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By Johannes Marbach on 2022-05-22T12:10:21

added 1 commit

• 9387d818 - main/postmarketos-mkinitfs: Correctly set up udev

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By Johannes Marbach on 2022-05-22T17:40:59

Does the udevd process continue running after exiting initramfs and switching to the rootfs?

By Luca Weiss on 2022-05-25T19:55:33

added 1 commit

• 14556c5e - main/postmarketos-mkinitfs: Correctly set up udev

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By Johannes Marbach on 2022-05-26T11:36:33

resolved all threads

By Johannes Marbach on 2022-05-26T11:37:55

mentioned in issue #1531

By clayton craft on 2022-05-26T15:11:22

approved this merge request

By Alexey Min on 2022-05-26T19:09:32

approved this merge request

By clayton craft on 2022-05-29T18:55:50

tested on qemu and the pinebook pro, which both had issues with keyboard input for me, and those issues seemed to be resolved now!

By clayton craft on 2022-05-29T19:38:30

Yay, awesome!

By Johannes Marbach on 2022-05-29T19:18:05

added 21 commits

• 14556c5e...9a18e34f - 20 commits from branch postmarketOS:master
• aa0f96ed - main/postmarketos-mkinitfs: Correctly set up udev (MR 3146)

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By clayton craft on 2022-05-29T19:03:29

added backport-to-v22.06 label

approved this merge request

By Oliver Smith on 2022-05-29T19:04:09

enabled an automatic merge when the pipeline for aa0f96ed succeeds

By clayton craft on 2022-05-29T19:04:17

merged

mentioned in issue #1411 (closed)

By clayton craft on 2022-05-29T19:09:32