Serial console problem in 2.6.21-rc7-mm1 and earlier

Serial console problem in 2.6.21-rc7-mm1 and earlier

[Christoph Lameter]

On Tue, 24 Apr 2007, Andrew Morton wrote:

> > Nothing special apart from 
> > the usual problem with serial not accepting characters that we had for 
> > awhile now.
> 
> I wasn't aware of that one.

I use a serial console on my x86_84 box. For a while now I can see all 
output but I cannot type any characters. /dev/console broke?

Simple WAR is to ssh into the box and I was usually too focused on 
other issues to do something about it.

Re: Serial console problem in 2.6.21-rc7-mm1 and earlier

[John Stoffel]

Christoph> On Tue, 24 Apr 2007, Andrew Morton wrote:
>> > Nothing special apart from 
>> > the usual problem with serial not accepting characters that we had for 
>> > awhile now.
>> 
>> I wasn't aware of that one.

Christoph> I use a serial console on my x86_84 box. For a while now I
Christoph> can see all output but I cannot type any
Christoph> characters. /dev/console broke?

I've sorta seen this problem too, but with gdm.  If I have my kernel
line setup like this:

	... console=tty0 console=ttyS0,9600n8

I have to stop and restart gdm (or switch to the XDMCP chooser and
back) to get keyoard access.  Wierd. 

Christoph> Simple WAR is to ssh into the box and I was usually too
Christoph> focused on other issues to do something about it.

Are you trying to access an X login prompter, or just a plain Virtual
Console tty?

John

Re: Serial console problem in 2.6.21-rc7-mm1 and earlier

[Christoph Lameter]

On Wed, 25 Apr 2007, John Stoffel wrote:

> Christoph> I use a serial console on my x86_84 box. For a while now I
> Christoph> can see all output but I cannot type any
> Christoph> characters. /dev/console broke?
> 
> I've sorta seen this problem too, but with gdm.  If I have my kernel
> line setup like this:
> 
> 	... console=tty0 console=ttyS0,9600n8
> 
> I have to stop and restart gdm (or switch to the XDMCP chooser and
> back) to get keyoard access.  Wierd. 
> 
> Christoph> Simple WAR is to ssh into the box and I was usually too
> Christoph> focused on other issues to do something about it.
> 
> Are you trying to access an X login prompter, or just a plain Virtual
> Console tty?

No X on the machine. And this is a serial console that works fine with 
2.6.21-rcX.

Re: Serial console problem in 2.6.21-rc7-mm1 and earlier

[John Stoffel]

>>>>> "Christoph" == Christoph Lameter <clameter@sgi.com> writes:

Christoph> On Wed, 25 Apr 2007, John Stoffel wrote:
Christoph> I use a serial console on my x86_84 box. For a while now I
Christoph> can see all output but I cannot type any
Christoph> characters. /dev/console broke?
>> 
>> I've sorta seen this problem too, but with gdm.  If I have my kernel
>> line setup like this:
>> 
>> ... console=tty0 console=ttyS0,9600n8
>> 
>> I have to stop and restart gdm (or switch to the XDMCP chooser and
>> back) to get keyoard access.  Wierd. 
>> 
Christoph> Simple WAR is to ssh into the box and I was usually too
Christoph> focused on other issues to do something about it.
>> 
>> Are you trying to access an X login prompter, or just a plain Virtual
>> Console tty?

Christoph> No X on the machine. And this is a serial console that
Christoph> works fine with 2.6.21-rcX.

Ok, no idea then.  It's working for me in 2.6.21-rc7 as long as I
don't have more than one console= entry in my kernel boot args. 

John

Re: Serial console problem in 2.6.21-rc7-mm1 and earlier

[Christoph Lameter]

On Wed, 25 Apr 2007, John Stoffel wrote:

> Ok, no idea then.  It's working for me in 2.6.21-rc7 as long as I
> don't have more than one console= entry in my kernel boot args. 

2.6.21-rc7 is working fine here too. mm is the problem.

Re: Serial console problem in 2.6.21-rc7-mm1 and earlier

[John Stoffel]

Christoph> On Wed, 25 Apr 2007, John Stoffel wrote:
>> Ok, no idea then.  It's working for me in 2.6.21-rc7 as long as I
>> don't have more than one console= entry in my kernel boot args. 

Christoph> 2.6.21-rc7 is working fine here too. mm is the problem.

Ah ok.  My issue must be something else then, but I haven't had the
time to chase it down properly.

John