[SOLVED] Keyboard and touchpad stopped working after update

ixolius · 2023-02-21 09:16:49

After a system update, the built-in keyboard and touchpad of my Fujitsu E736 don't work anymore after boot.
When they don't work:

When I boot to the display manager
When I boot to the mutli-user or even the emergency target

When the keyboard works, however:

Inside the BIOS settings
When I boot arch from an USB-Device

I tried to downgrade the linux-firmware package, but this didn't change anything. I think the suspect is either the firmware or udev.
I read how to debug udev in the wiki, but I'm unable to locate the log data. If someone helps me out, I will post it here.

Small edit: There are a lot of old topics around here about ASUS laptops with a similar problem. They are fairly old and shouldn't apply to me (For example, I don't have the concerning lines in the appropriate log files).

Last edited by ixolius (2023-02-22 10:06:15)

seth · 2023-02-21 12:45:20

It's probably the kernel, unfortunately linux and linux-lts are currently the same
Please provide the system journal of a broken and a good boot, eg.

sudo journalctl -b | curl -F 'file=@-' 0x0.st

sudo journalctl -b -1 | curl -F 'file=@-' 0x0.st # previous boot, increase the digit after -b to go back in time, eg. "-3"

ixolius · 2023-02-21 23:29:43

Journal of a boot where everything is ok: http://0x0.st/Hs2r.txt
Journal of a boot where things are broken: http://0x0.st/Hs2s.txt

I noticed some more things (finally found an external keyboard, so I could log in):

The dm_crypt module is not loaded (I cannot decrypt my homedir partition) and I cannot load it, because the system does not find the module. It is looking for the module in a folder with the wrong kernel version number (6.1.1 instead 6.1.12).
The network devices do not show up. I cannot connect to the internet
When plugging in an USB-Drive, i get an error message and all USB ports stop working

There is something fundamentally wrong...

seth · 2023-02-21 23:45:34

There is something fundamentally wrong...

You forgot to mount the /boot partition before the update.
As result, you're still booting 6.1.1-arch1-1 but there're no kernel modules for it installed on the disk.

Be happy, it's a trivial (and common…) error.

ixolius · 2023-02-22 10:05:48

Yeah, that was it. Mounting and reinstalling solved it.

I'm marking this as solved and removing the Computer model, maybe someone else will end up whrere i was.

seth wrote:

Be happy, it's a trivial (and common…) error.

I'm REALLY happy right now. Thanks for helping figuring this out.

Arch Linux

#1 2023-02-21 09:16:49

[SOLVED] Keyboard and touchpad stopped working after update

#2 2023-02-21 12:45:20

Re: [SOLVED] Keyboard and touchpad stopped working after update

#3 2023-02-21 23:29:43

Re: [SOLVED] Keyboard and touchpad stopped working after update

#4 2023-02-21 23:45:34

Re: [SOLVED] Keyboard and touchpad stopped working after update

#5 2023-02-22 10:05:48

Re: [SOLVED] Keyboard and touchpad stopped working after update

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