> Date: Fri, 30 Jul 2021 09:29:43 +0200 > From: Anton Lindqvist <[email protected]> > > >Synopsis: serial console no output > >Category: amd64 > >Environment: > System : OpenBSD 6.9 > Details : OpenBSD 6.9-current (GENERIC.MP) #381: Fri Jul 30 > 09:02:53 CEST 2021 > > [email protected]:/home/src/sys/arch/amd64/compile/GENERIC.MP > > Architecture: OpenBSD.amd64 > Machine : amd64 > >Description: > The serial console on this machine stops printing somewhere around the > time /etc/rc is executed. Last line of output on the console: > > Automatic boot i > > The `sh /etc/rc' process does not exit causing init(8) to wait > indefinitely for it. The same process is stuck here: > > #0 ttywait_nsec+0x10e > #1 killjobc+0x86 > #2 exit1+0x22a > #3 sys_exit+0x16 > #4 syscall+0x3b9 > #5 Xsyscall+0x128 > > I would assume there's pending output waiting to be flushed. Any ideas > or pointers on where to start digging would be much appreciated.
This is fairly typical for when interrupts aren't working correctly. OpenBSD expects a "legacy" setup where: com0 at isa? port 0x3f8 irq 4 # standard PC serial ports com1 at isa? port 0x2f8 irq 3 com2 at isa? port 0x3e8 irq 5 com3 at isa? disable port 0x2e8 irq 9 # (conflicts with some video cards) but modern machines may have different interrupt assignments. You may be able to change the interrupt assignments in the BIOS of the machine. Or you could try building a kernel with the irqs for com0 and com1 swapped around.
