Jeff ... thanks so much! That was exactly the solution, and if I had
asked earlier, I'd probably have less bruises from banging my head. :-)

 -s-

On Mar 27, 2008, at 11:30 AM, Jeff Burke wrote:
> Sandor,
>  Try the following change
>
> title Red Hat Enterprise Linux Server (2.6.18-53.1.14.el5xen)
>   root (hd0,0)
>   kernel /xen.gz-2.6.18-53.1.14.el5 com1=9600,8n1
>   module /vmlinuz-2.6.18-53.1.14.el5xen ro root=/dev/md2
> console=ttyS0,9600n8
>   module /initrd-2.6.18-53.1.14.el5xen.img
>
> Jeff
>
> Sandor W. Sklar wrote:
>> Hi, Folks ...
>> I'm trying to set up a Dom0 Xen system on a Sun X4200 M2 server.  
>> The problem I'm having is getting the xen kernel to send any output
>> to the serial console, and once up, to have a getty available on
>> that console.
>> My grub.conf contains this:
>> ##
>> default=1
>> timeout=60
>> serial --unit=0 --speed=9600
>> terminal --timeout=60 serial console
>> title Red Hat Enterprise Linux Server (2.6.18-53.1.14.el5)
>>   root (hd0,0)
>>   kernel /vmlinuz-2.6.18-53.1.14.el5 ro root=/dev/md2
>> console=ttyS0,9600n8
>>   initrd /initrd-2.6.18-53.1.14.el5.img
>> title Red Hat Enterprise Linux Server (2.6.18-53.1.14.el5xen)
>>   root (hd0,0)
>>   kernel /xen.gz-2.6.18-53.1.14.el5 console=ttyS0,9600n8
>> console=ttyS0
>>   module /vmlinuz-2.6.18-53.1.14.el5xen ro root=/dev/md2
>> console=ttyS0,9600n8
>>   module /initrd-2.6.18-53.1.14.el5xen.img
>> ##
>> If I select the non-xen entry, all works as expected; get the boot
>> messages (after the grub menu is displayed) on the serial console,
>> and when the system finishes start up, I'm presented with a
>> functional login prompt.
>> If I select the xen entry at the grub menu, though, the system
>> continues to boot, but the only thing displayed to the serial
>> console is:
>> Booting 'Red Hat Enterprise Linux Server (2.6.18-53.1.14.el5xen)'
>> root (hd0,0)
>> Filesystem type is ext2fs, partition type 0xfd
>> kernel /xen.gz-2.6.18-53.1.14.el5 console=ttyS0,9600n8 console=ttyS0
>>  [Multiboot-elf, <0x100000:0xbe5f8:0x50a08>, shtab=0x20f078,
>> entry=0x100000]
>> module /vmlinuz-2.6.18-53.1.14.el5xen ro root=/dev/md2
>> console=ttyS0,9600n8
>>  [Multiboot-module @ 0x210000, 0x8fa4d8 bytes]
>> module /initrd-2.6.18-53.1.14.el5xen.img
>>  [Multiboot-module @ 0xb0b000, 0x5f9200 bytes]
>> ... and after that, nothing goes to the serial console, nor is
>> there any login prompt offered. I can ssh in, of course, and run
>> "dmesg". Here are all the messages related to console stuff:
>> # dmesg | egrep -i 'console|vga|tty|serial'
>> Bootdata ok (command line is ro root=/dev/md2 console=ttyS0,9600n8)
>> Kernel command line: ro root=/dev/md2 console=ttyS0,9600n8
>> Console: colour VGA+ 80x25
>> Xen virtual console successfully installed as ttyS0
>> Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing
>> enabled
>> 8250_pnp: Unknown symbol serial8250_unregister_port
>> 8250_pnp: Unknown symbol serial8250_register_port
>> Is there something obvious I'm missing? I've googled around for
>> this, and it seems a common problem, without an obvious solution.
>> Thanks!
>>   -s-
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>> rhelv5-list@(protected)
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>
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