vt panic at startup, hd4650/hd6950

[Jean-Sébastien Pédron]

On 14.05.2014 06:55, Matt wrote:
> I've been seeing odd behavior with vt. At first I suspected my video
> hardware, hence the great delay.
> I use slim to start X at boot. After a hard power off, or at random, my
> computer will boot twice or more times, panicking and rebooting when X
> loads. Trace is pretty quick, but I believe it's mostly supervisor read
> page not present. I recently got a different radeon, hd6950, and it
> still behaves similarly. Usually, the second boot is fine, but not
> always. Maybe uninitialized memory or something like that? Conflict
> between xf86-video-ati and vt? Does this sound familiar/known to anyone?

I never heard of this. Could you please try to get a kernel core dump?

How to configure kernel core dumps is described in the Handbook:
http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug.html#kerneldebug-obtain

Additionally, I usually add the following sysctl, so that kernel dumps
work when running X.Org too:
debug.debugger_on_panic=0

-- 
Jean-Sébastien Pédron

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