Re: [Xen-users] Unable to reboot after install of Xen on fresh ubuntu running off recycled macbook hardware

[Marco Blanchette <marcoblanchette@xxxxxxxxxx>]

Thanks Ian,

Just to be clear (sorry, it's my first adventure playing with low level kernel 
services...), the debug console=hvc0 argument should be added to the Grub 
config? As is? Any where?

I also have no clue how to check wether a console is attached to hvc0, perhaps 
someone could suggest a path of actions?

Thanks

Sent from my iPad

Marco Blanchette, Ph.D.
Genomic Scientist
Stowers Institute for Medical Research
1000 East 50th St.
Kansas City, MO 64110

Tel: 816-926-4071 
Cell: 816-726-8419 
Fax: 816-926-2018

> On Dec 3, 2014, at 3:36 AM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> 
> If it's hanging after loading the initramfs then that suggests that
> either userspace isn't starting, or that its output is not going to the
> console.
> 
> You could try adding "debug console=hvc0" to the kernel module of the
> Xen entry, which might give you some output or some more hints at least.
> 
> You should also make sure that a getty is configured to run on hvc0 once
> the system is booted. I've no idea even which initsystem Ubuntu 14.10
> uses, so I'm not sure of the way one does that...
> 
> Ian.
> 
>> On Tue, 2014-12-02 at 20:51 -0600, Marco Blanchette wrote:
>> 
>> Dear list,
>> 
>> 
>> In my attempt to solve this problem, I went ahead and compile a fresh
>> download of Xen 4.5 from GitHub and install it on my MacBook hardware
>> running a Vanilla Ubuntu 14.10 as sole OS. Results are the same, Iâm
>> unbable to load the kernel on top of Xen. My effort in trying to tweak
>> Grub2 were all unsuccessful so I am doubting this is the problem.
>> 
>> 
>> Any help would be appreciated.
>> 
>> 
>> thanks
>> 
>> 
>> 
>>> On Nov 25, 2014, at 6:56 PM, Marco Blanchette
>>> <marcoblanchette@xxxxxx> wrote:
>>> 
>>> Hmmâ. Here is the menu entry for Ubuntu GNU/Linux, with Xen
>>> hypervisor for /boot/grub/grub.cfg (not /boot/grub2â that directory
>>> does not exist on my Unbuntu distro)
>>> 
>>> 
>>> menuentry 'Ubuntu GNU/Linux, with Xen hypervisor' --class ubuntu
>>> --class gnu-linux --class gnu --class os --class xen
>>> $menuentry_id_option
>>> 'xen-gnulinux-simple-858436db-0198-4d51-9d7f-8a0a4603eb7a' {
>>>        insmod part_gpt
>>>        insmod ext2
>>>        set root='hd0,gpt2'
>>>        if [ x$feature_platform_search_hint = xy ]; then
>>>          search --no-floppy --fs-uuid --set=root
>>> --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2
>>> 8a1f5b8a-1c17-434e-930e-d1687be8b6f4
>>>        else
>>>          search --no-floppy --fs-uuid --set=root
>>> 8a1f5b8a-1c17-434e-930e-d1687be8b6f4
>>>        fi
>>>        echo    'Loading Xen 4.4-amd64 ...'
>>>        if [ "$grub_platform" = "pc" -o "$grub_platform" = "" ];
>>> then
>>>            xen_rm_opts=
>>>        else
>>>            xen_rm_opts="no-real-mode edd=off"
>>>        fi
>>>        multiboot       /xen-4.4-amd64.gz placeholder
>>> ${xen_rm_opts}
>>>        echo    'Loading Linux 3.16.0-25-generic ...'
>>>        module  /vmlinuz-3.16.0-25-generic placeholder
>>> root=/dev/mapper/ubuntu--vg-root ro
>>>        echo    'Loading initial ramdisk God damn it!!!!...'
>>>        module  --nounzip   /initrd.img-3.16.0-25-generic
>>>        echo    'I'\''m passed loading the RAM disk'
>>> 
>>> 
>>> }
>>> 
>>> 
>>> Thanks for looking into this (I added the extra echo lines in my
>>> effort to figure out what was going on hereâ)
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>>> On Nov 25, 2014, at 6:47 PM, Manoj Subramaniam
>>>> <Manoj.Subramaniam@xxxxxxxxxx> wrote:
>>>> 
>>>> I suspect your menu entry for "Ubuntu GNU/Linux (kernel
>>>> 3.16.0-25-generic [or -0-23-]) , with Xen hypervisorâ is
>>>> incorrect. Did you run grub2-mkconfig? Verify the menu entry
>>>> in /boot/grub2/grub.cfg .
>>>> 
>>>> 
>>>> From: Marco Blanchette <marcoblanchette@xxxxxx>
>>>> Date: Tuesday, November 25, 2014 at 7:15 AM
>>>> To: "xen-users@xxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxx>
>>>> Subject: [Xen-users] Unable to reboot after install of Xen on
>>>> fresh ubuntu running off recycled macbook hardware
>>>> 
>>>> 
>>>> 
>>>> I'm pretty newbie with Xen and I appologize if this is something
>>>> that is easy and dumb... 
>>>> 
>>>> I just install a fresh vanilla ubuntu 14.10 server, followed by a
>>>> distribution upgrade. Ubuntu is installed on a recycled macbook
>>>> air late 2010 [MacBook Air "Core 2 Duo" 2.13 13" (Late â10) 2.13
>>>> GHz Core 2 Duo (SL9600) to be precise] on a 25 Gb root partition
>>>> with the remaining of the 250Gb SSD hard drive for LVM. Grub2 is
>>>> the boot loader. 
>>>> 
>>>> I then installed Xen 4.4 from the distro with sudo apt-get install
>>>> xex-hypervisor-4.4-amd64
>>>> 
>>>> Upon reboot of the Ubuntu GNU/Linux (kernel 3.16.0-25-generic [or
>>>> -0-23-]) , with Xen hypervisor in Grub (v 2.02 ~ beta2-15), the
>>>> boot process get stuck after echoing "Loading initial ramdiskâ.
>>>> I also tried Ubuntu 14.04.01 LTS server with the two different
>>>> kernels with no avail.
>>>> 
>>>> I suspect the problem is with the Grub configs but Iâm not sure
>>>> where to go from there to start figuring out what the problem is.
>>>> 
>>>> Any help would be really appreciate.
>>>> 
>>>> Thanks
>>>> _______________________________________________
>>>> Xen-users mailing list
>>>> Xen-users@xxxxxxxxxxxxx
>>>> http://lists.xen.org/xen-users
>> 
>> 
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> 
> 
> 
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