https://bugzilla.kernel.org/show_bug.cgi?id=217406
Bug ID: 217406 Summary: very slow keyboard typing otherwise without IRQ override with new AMD Ryzen CPUs Product: ACPI Version: 2.5 Kernel Version: 5.19.10 to 6.3.0 Hardware: AMD OS: Linux Status: NEW Severity: normal Priority: P3 Component: Config-Interrupts Assignee: acpi_config-interru...@kernel-bugs.osdl.org Reporter: evils...@proton.me CC: l...@kernel.org, raf...@kernel.org Regression: Yes Bisected 37c81d9f1d1b1458894454efcb857f6a769b6bc4 commit-id: Created attachment 304222 --> https://bugzilla.kernel.org/attachment.cgi?id=304222&action=edit patch to reenable IRQ override for recent AMD cpus I have an HP Pavilion Aero 13 laptop that comes with an AMD Ryzen 7735U CPU and an up-to-date BIOS. Using any kernel version that is strictly greater than 5.19.9 on it is causing the typing with the integrated keyboard to be extremely slow. "Slow" is subjective but let's say that once you hit a key you have to wait a few seconds for it to be displayed. Everything else is very responsive, `top` doesn't show any abnormally high CPU usage, and the issue is really with the keyboard. After some bisecting I found that 5.19.9 doesn't have this issue, but any version greater than or equal to 5.19.10 has it. Looking at the changelog of the 5.19.10 I noticed the 37c81d9f1d1b1458894454efcb857f6a769b6bc4 which disables IRQ overriding for AMD Ryzen CPUs. I then wrote the following patch (see attached) which basically reverts that change (the culprit is really just the `#ifdef` below) and now after applying that patch with any kernel version up to the 6.3.0 my keyboard is responsive again. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla