Stuck on blank screen after booting Xen

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Stuck on blank screen after booting Xen

Pratyush Yadav
Hi,

I am trying to boot Xen on my Laptop. FreeBSD without Xen boots fine
but when I install Xen and reboot, it gets to the boot loader screen,
prints some Xen messages and then stops on a blank screen.

I can't provide the logs as I never got the chance to look at them,
they go by very fast. All I remember is seeing some dots in a line and
then the blank screen.

I am running it on a laptop with Intel i7 4710HQ processor. Also, my
FreeBSD is installed in BIOS mode on my USB drive. Does Xen not
support boot from USB? Is there any other reason its getting stuck?
The config files I pretty much copied exactly from the FreeBSD as a
Xen host wiki page [0].

Regards,
Pratyush Yadav

[0] https://www.freebsd.org/doc/handbook/virtualization-host-xen.html
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Re: Stuck on blank screen after booting Xen

Akshay Jaggi-2
I guess this is expected behaviour. My knowledge is two years old. But
iirc, Dom0/Xen sent output over serial.

On Thu 17 May, 2018, 6:35 PM Pratyush Yadav, <[hidden email]> wrote:

> Hi,
>
> I am trying to boot Xen on my Laptop. FreeBSD without Xen boots fine
> but when I install Xen and reboot, it gets to the boot loader screen,
> prints some Xen messages and then stops on a blank screen.
>
> I can't provide the logs as I never got the chance to look at them,
> they go by very fast. All I remember is seeing some dots in a line and
> then the blank screen.
>
> I am running it on a laptop with Intel i7 4710HQ processor. Also, my
> FreeBSD is installed in BIOS mode on my USB drive. Does Xen not
> support boot from USB? Is there any other reason its getting stuck?
> The config files I pretty much copied exactly from the FreeBSD as a
> Xen host wiki page [0].
>
> Regards,
> Pratyush Yadav
>
> [0] https://www.freebsd.org/doc/handbook/virtualization-host-xen.html
>
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Re: Stuck on blank screen after booting Xen

Pratyush Yadav
HI,

On Thu, May 17, 2018 at 11:11 PM, Akshay Jaggi <[hidden email]> wrote:
> I guess this is expected behaviour. My knowledge is two years old. But iirc,
> Dom0/Xen sent output over serial.

Thanks! This put me on the right track. I enabled the vga output by
adding the option vga=current,keep in the Xen command line. The
optional keep parameter causes Xen to continue using the vga console
even after dom0 has been started. The default behaviour is to
relinquish control to dom0.

Xen still does not boot for me, but I'll ask that in a different thread.


> On Thu 17 May, 2018, 6:35 PM Pratyush Yadav, <[hidden email]> wrote:
>>
>> Hi,
>>
>> I am trying to boot Xen on my Laptop. FreeBSD without Xen boots fine
>> but when I install Xen and reboot, it gets to the boot loader screen,
>> prints some Xen messages and then stops on a blank screen.
>>
>> I can't provide the logs as I never got the chance to look at them,
>> they go by very fast. All I remember is seeing some dots in a line and
>> then the blank screen.
>>
>> I am running it on a laptop with Intel i7 4710HQ processor. Also, my
>> FreeBSD is installed in BIOS mode on my USB drive. Does Xen not
>> support boot from USB? Is there any other reason its getting stuck?
>> The config files I pretty much copied exactly from the FreeBSD as a
>> Xen host wiki page [0].
>>
>> Regards,
>> Pratyush Yadav
>>
>> [0] https://www.freebsd.org/doc/handbook/virtualization-host-xen.html

--
Regards,
Pratyush Yadav
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