Re: [uml-user] start a xterm on con1 fails

[Julien Iguchi-C. <jul...@un...>]

On 02/10/2015 09:27 PM, Richard Weinberger wrote:
> On Tue, Feb 10, 2015 at 3:53 PM, Julien Iguchi-Cartigny
> <jul...@un...> wrote:
>> Hello,
>>
>> I'm maintaining Netkit-NG, a set of scripts to boot and configure small
>> networks using UML machines for teaching purposes.
>>
>> <https://netkit-ng.github.io/>
>>
>> This set of scripts is based on Netkit
>>
>> <http://www.netkit.org/>
>>
>> which was using kernel from Debian Lenny. Starting UML with con1=xterm
>> was working at this time. But now, using the same configuration to boot
>> Debian Wheezy UML kernel with a xterm on con1 fails.
>>
>> So far I'm stuck with the following command lines.
>>
>> This one works (starts a xterm with UML):
>>
>> xterm -e /home/kartoch/works/netkit/netkit-ng/kernel/netkit-kernel
>> modules=/home/kartoch/works/netkit/netkit-ng/kernel/modules name=dummy
>> title=dummy umid=dummy mem=36M
>> ubd0=/home/kartoch/tmp/tmp/dummy.disk,/home/kartoch/works/netkit/netkit-ng/fs/netkit-fs
>> root=98:0 uml_dir=/home/kartoch/.netkit/mconsole hosthome=/home/kartoch
>> quiet con0=fd:0,fd:1 con1=null SELINUX_INIT=0
>>
>> But if I want to start UML with a second xterm on the con1, i.e.
>> replacing con1= null by con1=xterm in the commad line, no second xterm
>> is started. This was the expected behavior in the original netkit (and
>> it worked).
>>
>> I'm looking for help, especially about how to debug this problem (so far
>> no error messages in messages or dmesg in the host or the UML machine)
>> and how port-helper works on this case.
> 
> Can you find the last working kernel version?
> If we know that it worked in version X and was broken in X+1
> we can start searching. :)
> 

Hello,

thank you for your feedback.

At the present time I've only the "official" kernel from debian. So I've
a working instance based on Lenny and a not-working one on Wheezy.
testing by dichotomy every kernel between these two will require a lot
of time. Is there any standard UML testbed to fastly evaluate it ?

Regards

Julien