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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1991437
Title:
Keyboard inoperative on Lenovo Yoga 7 Gen 7 (AMD Ryzen 6800u)
Status in linux package in Ubuntu:
Incomplete
Bug description:
[Impact]
* The builtin keyboard on the Lenovo Yoga 7 Gen 7 doesn't work on
linux 5.19.0.15-generic (ubuntu-22.10-beta-desktop-amd64.iso; same
problem exists in 5.15.0-43-generic of ubuntu-22.04.1-desktop-
amd64.iso)
[Fix]
9946e39fe8d0a5da9eb947d8e40a7ef204ba016e ACPI: resource: skip IRQ override on
AMD Zen platforms
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.19.y&id=37c81d9f1d1b1458894454efcb857f6a769b6bc4
> IRQ override isn't needed on modern AMD Zen systems.
> There's an active low keyboard IRQ on AMD Ryzen 6000 and it will stay
> this way on newer platforms. This IRQ override breaks keyboards for
> almost all Ryzen 6000 laptops currently on the market.
> Skip this IRQ override for all AMD Zen platforms because this IRQ
> override is supposed to be a workaround for buggy ACPI DSDT and we can't
> have a long list of all future AMD CPUs/Laptops in the kernel code.
> If a device with buggy ACPI DSDT shows up, a separated list containing
> just them should be created.
The fix is in Linux 5.19.10.
[Other Info]
The keyboard worked when using a linux kernel 5.19.10 (in debian testing). I
tried to patch the kernel on the ubuntu live CD
ubuntu-22.04.1-desktop-amd64.iso, but the live filesystem could not be mounted
and I only got the busybox environment. The keyboard was working though.
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