Le Sun, Mar 31, 2024 at 09:30:05AM +0200, Landry Breuil a écrit :
> hi,
> 
> istr this has been discussed/fixed at some point and it used to work
> last year, but the t495s i have here on -current hangs at ttyflags -a in
> /etc/rc, commenting it again allows boot to succeed.
> 
> dmesg attached with -current. i dont boot that machine often enough, so
> the regression window is .. large.. guess i'll try bisecting.
> 
> last known working: #1463: Wed Nov 22 21:13:03 MST 2023.

after bisecting a bit, i'm puzzled because it seems ttyflags -a hangs
only happen when a spurious com0 is found in dmesg:

com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
com0: probed fifo depth: 0 bytes

but that device isnt present in the working boots from various kernel
versions (tried kernels from end of december to 1 feb so far)

it's enough to test with boot -s and ttyflags -a, i think i triggered it
once with a kernel from #1587: Sat Dec 30 22:44:51 MST 2023, next boots
on the same kernel were okay..

I've tried differentiating cold boots vs reboots, but that didn't help.

Landry

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