Hello everyone.

I have a raspberry pi 3b arm64 sd card which I recently upgraded in
stages from jessie to chimaera. This card has the second partition
encrypted, so I need an initramfs to decrypt it.

The problem is that my usb keyboard doesn't seem to be detected in the
initramfs. Once I unlock the partition from the serial console, boot
proceeds as expected, and everything is fine.

In /etc/initramfs-tools/modules I have:

# List of modules that you want to include in your initramfs.
# They will be loaded at boot time in the order below.
#
# Syntax: module_name [args ...]
#
# You must run update-initramfs(8) to effect this change.
#
# Examples:
#
# raid1
# sd_mod

evdev
ecb
xts

# USB keyboard at boot
usbhid
hid
hid_generic
ohci_pci


I doubt I need ohci_pci for the rpi3, but I saw references on the web
stating that it is needed for a usb keyboard, so included it just in
case.

The screen during the boot process until the unlock prompt says:

[    7.851176] hub 1-0:1.0: 1 port detected
Begin: Loading essential drivers ... [    7.973790] hid: raw HID
events driver (C) Jiri Kosina
[    7.998803] usbcore: registered new interface driver usbhid
[    8.008273] usbhid: USB HID core driver
[    8.083812] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI)
Driver
[    8.108252] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    8.123583] ehci-pci: EHCI PCI platform driver
[    8.136873] ohci-pci: OHCI PCI platform driver
done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top
...[    8.164405] usb 1-1: new high-speed USB device number 2 using
dwc2
 [    8.203533] urandom_read: 2 callbacks suppressed
 [    8.203543] random: lvm: uninitialized urandom read (4 bytes read)
 [    8.380597] usb 1-1: New USB device found, idVendor=0424,
 idProduct=9514, bcdDevice= 2.00
 [    8.396897] usb 1-1: New USB device strings: Mfr=0, Product=0,
 SerialNumber=0[    8.409579] hub 1-1:1.0: USB hub found
 [    8.411407] device-mapper: uevent: version 1.0.3
 [    8.417808] hub 1-1:1.0: 5 ports detected
 [    8.427132] device-mapper: ioctl: 4.43.0-ioctl (2020-10-01)
 initialised: dm-devel@???
 Please unlock disk mmcblk0p2_crypt:

If I plug and unplug the keyboard at this point, I don't see any
detection messages. I do see later on that after the root fs is
mounted, udevd is started. Also, if I boot with the keyboard
unplugged, login, look at lsmod, plug the keyboard again, and look at
lsmod again, no new modules are loaded, but the keyboard is
detected. So, I think I have all necessary modules in the initramfs,
but no udevd.

Should udev be in the initramfs? If yes, what should I look at to find
out why it isn't in the initramfs. If udevd shouldn't be in initramfs,
then something else would have to detect devices on the usb bus in the
initramfs. What is that something?

This used to work perfectly fine under jessie. If more info is needed,
I'll be happy to provide it. Thanks in advance for any tips. If this is
documented somewhere, and I haven't been able to find it in my
research, a pointer to that documentation would be good enough.

Greg


--
web site: http://www.gregn.net
gpg public key: http://www.gregn.net/pubkey.asc
skype: gregn1
(authorization required, add me to your contacts list first)
If we haven't been in touch before, e-mail me before adding me to your contacts.

--
Free domains: http://www.eu.org/ or mail dns-manager@???