Removing VGA card panics the box on boot

[Ruslan Ermilov]

On Mon, Nov 15, 2004 at 11:10:56AM -0800, Marcel Moolenaar wrote:
> On Mon, Nov 15, 2004 at 10:16:59AM +0200, Ruslan Ermilov wrote:
> > Hi there,
> > 
> > I needed the unused PCI VGA card for testing another machine,
> > so I pulled it out from my AlphaPC 164SX, and that gave me an
> > instant panic on boot:
> > 
> > : Timecounter "i8254" frequency 1193182 Hz quality 0
> > : Timecounter "alpha" frequency 533183689 Hz quality 800
> > : Timecounters tick every 0.976 msec
> > : panic: mtx_lock() of spin mutex (null) @ /usr/src/sys/netinet/igmp.c:431
> > : cpuid = 0
> > : KDB: enter: panic
> > : [thread 100004]
> > : Stopped at      kdb_enter+0x48: or      zero,zero,zero  <zero=0x0>
> > : db> 
> > 
> > Putting it back in results in normal behavior (no panic).
> > Any hints?
> 
> Typically only syscons cares about having a VGA adapter. I don't see
> if you have syscons configured or not, but assume you have. I also
> don't see it mentioned wether you normally use a serial console or a
> graphical console. So, it's hard to come up with any good hints.
> 
> My first guess would be: remove syscons (or remove the hint from
> /boot/device.hints. Make sure you have a suitable alternative for
> the console. I forgot if promcons could survive multi-user mode,
> so you may want to have sio(4) or uart(4) lined up as the console.
> 
Yeah, I tried removing a hint (sc.0.at), but that didn't help.


Cheers,
-- 
Ruslan Ermilov
ru at FreeBSD.org
FreeBSD committer
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