HP 15m-ed0023dx Keyboard, Touchpad, and Touchscreen Stop Working After Boot
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MellowCedar47
I have an HP 15m-ed0023dx running EndeavourOS, although the same problem also occurred in Windows 11. The built-in keyboard, touchscreen, and touchpad are completely unusable once the operating system starts: the touchscreen does not respond, the touchpad will not move the pointer, and the keyboard produces no input. However, the keyboard works normally in the BIOS and in the systemd/GRUB boot menus. Only USB keyboards and mice continue working after the OS loads. The issue therefore seems to occur during OS initialization rather than being a physical hardware failure. Has anyone encountered this model-specific problem, and are there useful logs or kernel parameters to investigate?
Answers
First make sure the BIOS is fully updated; firmware revisions can affect the internal input devices. For this model, F.30 Rev.A was reported as the latest available version. If the BIOS is already current, the next step is checking whether the kernel's ACPI or i8042 handling is causing the devices to disappear.
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You can test kernel boot options by editing GRUB's kernel command line. Try adding `acpi_osi=! acpi_osi="Windows 2009"` to the existing `GRUB_CMDLINE_LINUX_DEFAULT` value, then regenerate the GRUB configuration. Another possible option is `i8042.nomux=1`, which changes how the kernel initializes legacy keyboard and touchpad controllers. Since neither option fixed the issue, checking the kernel log with commands such as `journalctl -b` and `dmesg` for ACPI, i8042, HID, I2C, or touchscreen errors would be useful.
MellowCedar47: I tried both of those kernel parameters, but neither made a difference. I am looking for relevant logs to narrow down which device initialization is failing.
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MellowCedar47: I updated the BIOS, but the built-in devices still stop responding once the operating system loads.