em0: watchdog timeout coupled with NVRM head errors ...

[Wilkinson, Alex]

    0n Mon, Apr 16, 2007 at 11:57:02AM +0800, Wilkinson, Alex wrote: 

    >Hi all,
    >
    >FreeBSD 7.0-CURRENT #0: Tue Apr 10 13:47:53 WST 2007
    >
    >Seeing on console:
    >
    >  em0: watchdog timeout -- resetting
    >  NVRM: Xid (0001:00): 16, Head 00000000 Count 000d5cf4
    >  NVRM: Xid (0001:00): 16, Head 00000001 Count 0010b447
    >  NVRM: Xid (0001:00): 8, Channel 0000001e
    >  em0: watchdog timeout -- resetting
    >  NVRM: Xid (0001:00): 16, Head 00000000 Count 000d5cf5
    >  em0: watchdog timeout -- resetting
    >
    >I am using x11/nvidia-driver/ with TwinView.
    >
    >I will be happily working away and 'boom' I loose my second head and am left
    >with one monitor. And I see the afforementioned errors spewing out to the
    >console.
    >
    >Any hot tips on this one ?

For the sake of the archives.

The problem was, was x11/nvidia-driver/ and em(4) where sharing the same
IRQ. I manually changed the IRQ  assingment in the BIOS and nvidia0+ and em(4)
are now on separate IRQ lines. Problem solved.

   #vmstat -i | egrep -i "nvidia|em"
   irq16: em0 uhci0                 2908195         18
   irq18: nvidia0+                 21481654        136

REF: http://www.nvnews.net/vbulletin/showthread.php?t=73644
     http://www.nvnews.net/vbulletin/showthread.php?t=82527

 -aW

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