Am 16.09.2014 um 15:44 schrieb Pat Riehecky <[log in to unmask]>:

> On 09/16/2014 04:14 AM, Peter Boy wrote:
>> A repost from user list on request of Pat:
>> 
>> 
>> I tried to install the current (2014-09-15) tree of EL 7 onto a remote EL5 XEN host using a locally installed virt-manager.
>> 
>> The process proceeded up to download  all the initial stuff and to create the virtual machine. While booting the virtual machine the screen used to switch to VNC to work through the anaconda installation process. Instead, the VNC screen remains black, virt-manager shows some activity on the created machine for a while and then it stops and seems to freeze.
>> 
>> If I create a SL 6.5 guest into the same environment using the same procedure everything works fine.
>> 
>> I can even upgrade an SL 6.5 installation to SL7 using the Red Hat tools. That SL7 guest boots and is working without any problem to far. But if you try to connect  virt-manager  to that instance’s console you get just a black screen (but the machine continues to work) .
>> 
>> There are some reports on the internet how to install SL/EL7 on a XEN host using kickstart. Nevertheless, it would be advantageous to be able to connect to a gust using virt-manager console.
>> 
>> 
>> PB
>> 
>>  
> 
> The OS may have 'powered down' the virtual monitor.
> 
> If you click in the window and hit enter a few times does the console appear?


Unfortunately, it does not.  With 6.5 it works that way.

I did some additional „Google search“ and found some remarks about FB (I suppose frame buffer driver from the context) which has changed in EL7 and which doesn’t take care of XEN’s way anymore but can be compensated by additional kernel parameters during boot. But unfortunately, I’m not familiar enough with the technical details to make any sense of it and had to give up.


Peter



> 
> Pat
> 
> 
> -- 
> Pat Riehecky
> 
> Scientific Linux developer
> http://www.scientificlinux.org/
> 


—
Dr. Peter Boy
Universität Bremen

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www.zes.uni-bremen.de

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