[Bug 216230] "irq9: nobody cared" on Thinkpad T14 Gen1 (AMD) when s2idle is enabled

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216230

--- Comment #15 from madcatx@atlas.cz ---
I made a small discovery today. After adding pinctrl_amd module to my initramfs
I haven't been able to reproduce the problem so far. That may not be indicative
of anything because the problem does not appear every time. A bit more
interesting is my current output of /proc/interrupts. For IRQ9 it currently
shows

 9:          0      11461          0          0          0          0         
0          0          0          0          0          0          0          0 
        0          0  IR-IO-APIC    9-fasteoi   acpi, pinctrl_amd

Notice that the number of recorded interrupts is around 11000. Before I added
pinctrl_amd to initramfs, there were two distinct cases. Either over 100000
interrupts with the kernel complaining about IRQ9 not being serviced or about
90 interrupts and no apparent issues. All of these numbers are from
/proc/interrupts dump done right after logging into DE after a reboot.

I was able to reproduce these figures multiple times. This suggests that some
HW starts to blast IRQs and doesn't stop until it gets serviced. Knowing this,
is there anything else you'd like me to try besides your suggestions above?

My CONFIG_PINCTRL_AMD is set to CONFIG_PINCTRL_AMD=m in my kernel config and
the respective module is loaded.

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