* serial console
@ 2000-02-11 17:08 Pat O'Rourke
2000-02-11 21:04 ` Matthew Jacob
2000-02-11 21:21 ` Pat O'Rourke
0 siblings, 2 replies; 3+ messages in thread
From: Pat O'Rourke @ 2000-02-11 17:08 UTC (permalink / raw)
To: ultralinux
I have an Ultra-1 clone whose console is redirected to the serial port,
Console: ttyS0 (SAB82532), however it is only working intermittently when
linux boots. By "working" I mean no output is seen, nor is any input
possible.
Messages sent directly to the prom seem okay, i.e. at the'ok' prompt or via
prom_printf() calls. I tried various incantations of the serial= option to
noavail. This problem is only when linux is booted, if I shutdown the OS
the console comes back and I can interact with OBP.
It seems that if I power cycle the machine the serial console will work,
but on subsequent reboots it does not. Has anyone else encountered this?
The behavior is the same whether I am booting a 2.2.x or 2.3.x kernel.
Any suggestions would be greatly appreciated.
Thanks in advance,
Pat
--
Patrick O'Rourke
orourke@missioncriticallinux.com
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: serial console
2000-02-11 17:08 serial console Pat O'Rourke
@ 2000-02-11 21:04 ` Matthew Jacob
2000-02-11 21:21 ` Pat O'Rourke
1 sibling, 0 replies; 3+ messages in thread
From: Matthew Jacob @ 2000-02-11 21:04 UTC (permalink / raw)
To: ultralinux
> Messages sent directly to the prom seem okay, i.e. at the'ok' prompt or via
> prom_printf() calls. I tried various incantations of the serial= option to
> noavail. This problem is only when linux is booted, if I shutdown the OS
> the console comes back and I can interact with OBP.
>
> It seems that if I power cycle the machine the serial console will work,
> but on subsequent reboots it does not. Has anyone else encountered this?
> The behavior is the same whether I am booting a 2.2.x or 2.3.x kernel.
>
> Any suggestions would be greatly appreciated.
define 'not work'? I've had the serial console just be 'strange' when running
it in a screen session so I just type 'reset'.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: serial console
2000-02-11 17:08 serial console Pat O'Rourke
2000-02-11 21:04 ` Matthew Jacob
@ 2000-02-11 21:21 ` Pat O'Rourke
1 sibling, 0 replies; 3+ messages in thread
From: Pat O'Rourke @ 2000-02-11 21:21 UTC (permalink / raw)
To: ultralinux
Matthew Jacob wrote:
> define 'not work'? I've had the serial console just be 'strange' when running
> it in a screen session so I just type 'reset'.
It receives no output (kernel printk's don't show up) and does not accept
input. I've been using minicom and the status bar shows 'offline' right
after the message 'Booting Linux...' appears (note this is a prom_printf
as opposed to a printk).
Pat
--
Patrick O'Rourke
orourke@missioncriticallinux.com
^ permalink raw reply [flat|nested] 3+ messages in thread
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