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Trouble with Legacy interrupts on new CPU

A legacy (IntA) interrupt works on an old CPU under Linux, but fails under the same Linux OS with a newer CPU in that system. I'm unsure if the problem is in the BIOS or in the Linux driver, as both ...
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What does `/proc/irq/…/spurious` contain?

Here is the output from cat /proc/irq/79/spurious: count 28 unhandled 0 last_unhandled 0 ms What are these parameters indicating here — count, last_unhandled? Is this count indicating the number of ...
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What does this mean: “Interrupt: pin A routed to IRQ 17”

When I run the command: sudo lspci -vvv, I see the following among the output: 0c:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01) Subsystem: Dell Wireless 1390 ...