Do-It-Yourself, Repairs and Fixes

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Lenovo Legion Y540 Keyboard Issue (lemmy.world)

submitted 3 weeks ago by [email protected] to c/[email protected]

17 comments fedilink hide all child comments

Problem

The laptop's keyboard works properly when the computer on first boots up, but if the computer enters any kind of low power state (i.e. goes to sleep, restarts, or shuts down) while still having a charged battery/power source plugged in then the keyboard stops working (even in the BIOS), except the backlight works and the brightness/accessory keys work. This problem persists in both windows and linux distros. On NixOS, the booting sequence messages a couple ACPI BIOS errors before starting and occasionally the kernel sends usb errors (error -71) which then crashes the desktop environment. When using 'showkey', some keys send very weird key presses.

What I've Tried

multiple Operating Systems
updating the BIOS, then flashing it back
unplugging the keyboard from the motherboard, then replugging it

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[–] [email protected] 1 points 3 weeks ago (5 children)

I take it that's with the built in keyboard still connected?

[–] [email protected] 1 points 3 weeks ago (4 children)

No, that's with the keyboard disconnected and the external connected.

When keyborad is connected, linux launches fine and has usb errors, and the external works as well.

[–] [email protected] 1 points 3 weeks ago (3 children)

That's bizarre, I'm surprised Linux is unable to deal with the disconnected internal kB, what's the systemd error before it packs it in?

You should be able to boot with the intkb disconnected to failure then switch off, reconnect the intkb, boot normally then use jounald to see the last boot logs.

When it boots to windows with only the extkb connected, does the extkB still fail following sleep?

[–] [email protected] 1 points 3 weeks ago (1 children)

it doesn't give an error, it just says 'starting systemd udevd' and then hangs for a long time. It becomes completely unresponsive and I have to unplug it to get it working.

In windows, no, the external keyboard works regardless.

[–] [email protected] 1 points 3 weeks ago (1 children)

I would have thought the logs would share more than that.

The weird Linux function aside, sounds there's something in the intkb that's toast. There seems to be a firmware update for that kB, have you tried updating that (or rolling it back)?

[–] [email protected] 1 points 3 weeks ago

After downloading windows before, it, of course, became the default OS, and so in trying to recover my linux installation, the NixOS installer won't launch (due to the problem above).

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