On Sat, Nov 13, 2010 at 2:08 PM, Robert Watson <rwat...@freebsd.org> wrote:
>
> On Sat, 13 Nov 2010, Alexander Best wrote:
>
>>>> i tried detaching and attaching my keyboard after chromium crashed my
>>>> system and the lights of the keyboard didn't even went on. so in fact
>>>> everything crashed and not just X.
>>>
>>> If I said it unclear, let me repeat, the usermode crash dump you got
>>> probably has nothing common with the kernel issue.
>>
>> oh sorry. indeed i misunderstood you there. well i guess this is the
>> problem most regular users have. we don't own any serial/firewire consoles.
>> all i can offer is to add kernel OPTIONS. however none of them seem to be
>> able to prevent the lock up and instead letting me enter the debugger or
>> trigger a kernel core dump.
>>
>> i even have watchdog running, but without any sucess. i guess all i can
>> hope for is that maybe at some point a kernel dump does make it to disk.
>
> Do you have a second box you can run X11 on, and SSH into the box that will
> run Chromium? If it is really Chromium triggering the crash, this might
> allow you to access the console when it crashes. However, if it's Chromium
> triggering an X11-related crash, it might well not. (Also, it might well
> not because of timing differences, but it is worth a try).
>
> Another thing to consider is starting Chromium when switched to a text
> virtual console from X11, which would leave you in text mode for DDB, or at
> least let you see something interesting on the console.
>
> If regular crashdumps appear unreliable, try setting up a textdump with an
> automatic reboot, that might provde more reliable (small chance, but it
> could).
Isn't there also DEADLKRES that might be helpful in this case (if
Alex is really dealing with a livelock in the kernel)...?
Thanks,
-Garrett
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