I have an old PC Engines APU2c2 (PC Engines apu2 system boards), bought in 2016. This has been running C7 nicely since then.
Yesterday I installed a new (blank) mSATA card in it and then deployed R9 “minimal install”. Took a few attempts to get the partitioning the way I wanted (it’s a lot harder when all you have is a serial console), but I got there
However on reboot the following “emergency” messages appear
__common_interrupt: 1.55 No irq handler for vector
__common_interrupt: 2.55 No irq handler for vector
__common_interrupt: 3.55 No irq handler for vector
(That’s one per CPU core, but not core 0 ?!)
The machine appears to be working (although I haven’t stress tested it).
Googling doesn’t help much; hints around disabling iommu; I’ve tried iommu=off amd_iommu=off intel_iommu=off but the messages still remain.
According to /proc/interrupts
I see
55: 0 0 0 0 IO-APIC 16-fasteoi ath9k
So I removed that piece of hardware (since I’m not using Wifi on this machine). Now on reboot I still get the same messages, but /proc/interrupts
shows nothing on 55
Also lspci -v | grep -i irq
shows nothing on that IRQ.
I could try flashing a new bios but I’m loathe to do this except as last resort (recovery isn’t easy if it goes wrong).
Has anyone else seen this message and have any ideas?
FWIW,
CPU: AMD GX-412TC SOC
BIOS:
Vendor: coreboot
Version: 88a4f96