Comment 31 for bug 37472

> And maybe really a problem of battery-status. Because this
> is the first-time linux recognizes my smart-battery -

Exactly. That is the culprit. If you remove the smart battery module, you can restore sanity of your keyboard. I think this kernel got the smart battery patch but not the embedded controller one. So the workaround:

sudo rmmod acpi_sbs

But this will turn off battery monitoring too.