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xen-users
Re: [Xen-users] XenSerialConsole help + GRUB2 (Machine locks up on boot)
On Sat, Apr 10, 2010 at 10:03:51AM -0400, Mike Viau wrote:
> 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:
>
> [1]http://wiki.xensource.com/xenwiki/XenSerialConsole
> [2]http://wiki.xensource.com/xenwiki/XenParavirtOps
>
> I noticed the wiki was written for use with grub legacy.
>
I wouldn't call grub1 legacy since it's still used by most of the distros :)
> 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...
>
Can you please paste the full boot messages before it locks up?
> 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:
> [3]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:
>
> [4]http://www.intel.com/products/desktop/motherboards/DP55WG/DP55WG-overview.htm
> [5]http://ark.intel.com/Product.aspx?id=40078
>
> Add-in serial card:
> "Cables Unlimited IOC-2200 2-Port DB9 Serial PCI I/O Card"
>
> [6](http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=1431863&CatId=1422)
>
Does the serial console work with plain baremetal Linux? (without Xen).
> 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]
So the first port has IO port 0x1008 and uses IRQ 22.
-- Pasi
> 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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