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Owen avatar Ubuntu

Is there a proper solution to "Keyboard and Mouse not working after boot" problem?

bw flag
Owen

I recently replaced a smashed screen on a HP Spectre x360 G2, running Ubuntu 20.04LTS. However, after booting up again I had lost the use of the laptop's touchpad and keyboard (NB. devices still functioned in the BIOS, but lost function after GRUB). There are many similar questions floated here1, here2, here3, here4, here5, here6, and here7. I have followed all these prompts - most suggest (re)installing xserver-xorg-input-all but it was all up to date, no changes.

The last link offered some help: by switching ACPI off in the GRUB settings (edit /etc/default/grub inserting acpi=off after quiet splash, and updating GRUB as advised). This reverted to old APM and I regained control of mouse and keyboard. However this came with other issues - namely, the kernel has no access to power status, and the keyboard was primitive (none of the special keys worked, e.g. volume/brightness).

I also tried upgrading to Ubuntu 20.10, and that brought other issues - namely it was unbearably laggy. (But I think it had full functionality).

Anyway, after a clean install of 20.04, the problem persists. Can anyone offer some advice?

Edit: Also found this related post, which and tried blacklisting intel-vbtn. In the answer from @IGR94, they mention this won't work for a /sys/class/dmi/id/chassis_type of 31 or 32. Mine is 31, which explains why that answer does not solve.

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Nate T avatar
it flag
Nate T
21.04 doesn't use Xorg at all. It uses Wayland. Have you thought about updating? You can also install Wayland manually, and switch to it via the login screen (settings option in the bottom right corner). Not sure if it will solve your issue or not.
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Owen avatar
bw flag
Owen
@NateT I believe ACPI is at a lower level than Xorg, isn't it? If ACPI is not configured properly then XOrg won't run properly on top of it. Doesn't seem to be a window issue, but a hardware configuration issue.
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Nate T avatar
it flag
Nate T
ACPI is at a lower level than your entire OS. ACPI is an IO protocol implemented by your device manufacturer. It has a setting in the BIOS settings, so I assume it is part of the BIOS layer. In fact, if it is set, I would say that it _is_ your BIOS layer, BIOS just means "Basic IO System". In other words, ACPI is at the lowest level. The only way to change your ACPI config is to update your BIOS, which I do not recommend unless it needs to be done. If something goes wrong during the update process, your device is effectively bricked, unless you can somehow reflash it.
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