Re: Silent reboots in head _at_r248550 starting xdm with x11/nvidia-driver

From: David Wolfskill <david_at_catwhisker.org>
Date: Wed, 20 Mar 2013 18:36:10 -0700
On Wed, Mar 20, 2013 at 10:08:57PM +0200, Konstantin Belousov wrote:
> ...
> I looked at the nvidia sources to check that the driver does not use
> the interfaces which KBI was changed, and this is indeed the case, as
> expected.
> 
> I must admit that I have no idea why buffer cache changes could affect
> nvidia driver, and with no input on the panic (I hope that it is panic,
> and not a reset) have no idea even to speculate. So firewire cable is
> probably the must.
> 
> Note that I split that import of the work into the series of commits.
> The split was done to ease the reading of the chunks, and individual
> commits were not functionally tested. Still, you might try to do the
> bisect.

I elected to go ahead and try the bisection; here are my results:

r248493M/248493: OK
r248550M/248551: resets on X startup with nvidia.ko
r248521M/248521: resets on X startup with nvidia.ko
r248507M/248507: OK
r248508M/248508: resets on X startup with nvidia.ko

r248493M/248493 was my last working point (built yesterday morning).
r248550M/248551 was what failed for me this morning.
r248521M/248521 was a convenient mid-point between the above two.
r248507M/248507 was the next natural test-point.
  r248508M/248508 was a guess on my part -- I would normally have gone to
  r248514, but since I had previously noted that r248508 touched some
  things that nvidia-driver uses, I thought that test might be worthwhile.

I am, however, mildly concerned that no one else appears to be reporting
similar symptoms (though I have it on good authority that someone is
about to test).

Peace,
david
-- 
David H. Wolfskill				david_at_catwhisker.org
Taliban: Evil men with guns afraid of truth from a 14-year old girl.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.

Received on Thu Mar 21 2013 - 00:36:11 UTC

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