From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: Blank screen while booting xen
Date: Mon, 11 Jan 2016 12:30:56 -0500
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To: Harmandeep Kaur <write.harmandeep@gmail.com>
Cc: xen-devel@lists.xenproject.org, Dario Faggioli <dario.faggioli@citrix.com>
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On Mon, Jan 11, 2016 at 10:56:07PM +0530, Harmandeep Kaur wrote:
> On Mon, Jan 11, 2016 at 8:23 PM, Konrad Rzeszutek Wilk
> <konrad.wilk@oracle.com> wrote:
> > On Mon, Jan 11, 2016 at 12:57:27AM +0530, Harmandeep Kaur wrote:
> >> Hi,
> >>
> >> I tried to modify and compile some of Xen 4.7's code
> >> (cloned from git clone git://xenbits.xen.org/xen.git)
> >> and even with a very minor change (patch included at last)
> >> my xen failed to boot. It stucks at black blank screen after
> >> showing some xen logs.
> >
> > What is on your Linux command line? Do you have 'console=hvc0' ?
> my /etc/defaults/grub   http://paste2.org/BkOOOskh
> my /boot/grub/grub.cfg http://paste2.org/Ks49MZEh
> >
> >>
> >> By adding "vga=text-80x80,keep" to the grub before booting
> >> xen., infinite loop of text
> >> "(XEN) traps.c:3290: GPF (0000): ffff82d0801af4d5 -> ffff82d080240e5a"
> >> appears.
> >>
> >> I tried to compile and boot xen reverting the change, but
> >> same issue still exists.
> >>
> >> Also I tried to setup serial console but my output is garbled.
> >> More info on it here,
> >> http://lists.xenproject.org/archives/html/xen-devel/2015-12/msg02045.html
> >>
> >> I tried different software (cu, gtkterm), different baud rates,
> >> different serial-USB cable and stopping modemmanager,
> >> but no luck.
> >
> > How did you set the baudrate? I usually do 'screen /dev/ttyUSB0 115200 cs8'
> > ?
> 
> I also tried the same with screen just without the cs8 keyword.
> 
> >>
> >> I am using i3-6100 processor, if that info is needed.I will
> >> appreciate any help.
> >
> > dmesg | grep tty
> 
> $ dmesg | grep tty
> [       0.000000] console [tty0] enabled
> [       4.537790] systemd[1]: Created slice system-getty.slice.
> [11542.458553] usb 1-4: pl2303 converter now attache


This is on your box with the USB dongle. I meant the other one.

Maybe we should step back a bit. On the machine on which you
want to install Xen - does it work if you install say
Fedora Core 23 and after installing, you do 'yum install xen' ?
Can you boot with that? Then at least we will know whether an
packaged version of Xen works on your machine.