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AW: [Xen-users] modem on serial port in Dom0


  • To: <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: Holger Schultheiß <hoschult@xxxxxx>
  • Date: Fri, 21 Jul 2006 17:26:59 +0200
  • Delivery-date: Fri, 21 Jul 2006 08:27:57 -0700
  • Importance: Normal
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

> > Hi all,
> > 
> > I'm using Xen (stable tarball 3.0.2). I want to connect a 
> modem to my serial
> > port (ttyS0). After setting "xencons=off" in the module 
> line of my grub, Xen
> > doesn't use this port itself (dmesg said nothing about ttyS0).
> > 
> > So I did a "modprobe parport" and a "modprobe 8250" says:
> > FATAL: Error inserting 8250
> > (/lib/modules/2.6.16-xen/kernel/drivers/serial/8250.ko): 
> Unknown symbol in
> > module, or unknown parameter (see dmesg)
> > 
> > dmesg:
> > 8250: Unknown symbol uart_get_baud_rate
> > 8250: Unknown symbol uart_resume_port
> > 8250: Unknown symbol uart_register_driver
> > 8250: Unknown symbol uart_suspend_port
> > 8250: Unknown symbol uart_remove_one_port
> > 8250: Unknown symbol uart_update_timeout
> > 8250: Unknown symbol uart_unregister_driver
> > 8250: Unknown symbol uart_get_divisor
> > 8250: Unknown symbol uart_match_port
> > 8250: Unknown symbol uart_add_one_port
> > 8250: Unknown symbol uart_write_wakeup
> > 
> > Did anyone have experience in this error / what went wrong?
> > Do I have to compile my own Xen0 kernel with serial port support?
> 
> Those symbols are exported from serial_core.  try:
> modprobe serial_core && modprobe 8250

unfortunately I can't find a module 'serial_core' in
/lib/modules/2.6.16-xen,
this can be the issue why modprobe does not autoload, isn't it?

Is there a reason why 'serial_core' is NOT included in the binary tarball
(Xen stable 3.0.2)?

> 
> It /should/ be autolaoded when you modprobe 8250.  I don't know what's
> going on there.

After reviewing my boot messages I found the errors above (unkown
symbols....).
So linux wants to load 8250, but the needed symbols aren't available..

Thanks,
Holger

> 
> Yours Tony
> 
>    linux.conf.au       http://linux.conf.au/ || 
> http://lca2007.linux.org.au/
>    Jan 15-20 2007      The Australian Linux Technical Conference!
> 
> 
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> 


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