[Xen-users] XenSerialConsole help + GRUB2 (Machine locks up on boot)

[Mike Viau <viaum@xxxxxxxxxxxxxxx>]

Hello,

I am trying to setup a Xen serial console for easily debugging the full kernel boot messages even if it crashes with the help from the following wiki pages:


http://wiki.xensource.com/xenwiki/XenSerialConsole
http://wiki.xensource.com/xenwiki/XenParavirtOps


I noticed the wiki was written for use with grub legacy. Therefore I am not certain if the serial console issue is with the way the grub2 package implemented serial consoles.


My problem is the machine locks up on boot after printing the messages:

    (XEN) Xen trace buffers: disabled
    (XEN) Std. Loglevel: All
    (XEN) Guest Loglevel: All
    (XEN) **********************************************
    (XEN) ******* WARNING: CONSOLE OUTPUT IS SYNCHRONOUS
    (XEN) ******* This option is intended to aid debugging of Xen by ensuring
    (XEN) ******* that all output is synchronously delivered on the serial line.
    (XEN) ******* However it can introduce SIGNIFICANT latencies and affect
    (XEN) ******* timekeeping. It is NOT recommended for production use!
    (XEN) **********************************************
    (XEN) 3... 2... 1... 

After that I just get a blank screen with a blinking "_" prompt at the top left hand corner of the screen. I understand that this message should not alone cause the kernel to stop booting at the output was actually found on another thread at: http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00340.html


Does any have a non-standard PCI serial port Xen serial console working with grub2? What does your /etc/default/grub file and menuentrys look like? What does your /etc/inittab look like?


My motherboard does not have a serial port or even serial headers connectors on the board. Therefor I purchased an add-in serial card to obtain serial ports on the machine.


Motherboard:
http://www.intel.com/products/desktop/motherboards/DP55WG/DP55WG-overview.htm
http://ark.intel.com/Product.aspx?id=40078

Add-in serial card:
"Cables Unlimited IOC-2200 2-Port DB9 Serial PCI I/O Card" (http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=1431863&CatId=1422)


My GRUB2 configuration files are also attached from:

/etc/default/grub
/boot/grub/grub.cfg (trying to boot "Setting up Xen 4.0.0 / PVOPS 2.6.32-4-xen-amd64 with a serial console" entry)


Lastly a snippet from lspci -vvv

05:01.0 Serial controller: NetMos Technology Device 9865 (prog-if 02 [16550])
    Subsystem: Device a000:1000
    Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
    Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    Interrupt: pin A routed to IRQ 22
    Region 0: I/O ports at 1008 [size=8]
    Region 1: Memory at f0007000 (32-bit, non-prefetchable) [size=4K]
    Region 4: Memory at f0006000 (32-bit, non-prefetchable) [size=4K]
    Capabilities: [48] Power Management version 2
        Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
        Status: D0 PME-Enable- DSel=0 DScale=1 PME-

05:01.1 Serial controller: NetMos Technology Device 9865 (prog-if 02 [16550])
    Subsystem: Device a000:1000
    Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
    Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    Interrupt: pin B routed to IRQ 21
    Region 0: I/O ports at 1000 [size=8]
    Region 1: Memory at f0005000 (32-bit, non-prefetchable) [size=4K]
    Region 4: Memory at f0004000 (32-bit, non-prefetchable) [size=4K]
    Capabilities: [48] Power Management version 2
        Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
        Status: D0 PME-Enable- DSel=0 DScale=1 PME-
 

Thanks for looking!

-M

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