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Date:      Sat, 13 Nov 2010 14:17:35 -0800
From:      Julian Elischer <julian@freebsd.org>
To:        Robert Watson <rwatson@freebsd.org>
Cc:        Kostik Belousov <kostikbel@gmail.com>, Alexander Best <arundel@freebsd.org>, freebsd-current@freebsd.org
Subject:   Re: www/chromium crashing whole system
Message-ID:  <4CDF0E7F.3060406@freebsd.org>
In-Reply-To: <alpine.BSF.2.00.1011132206380.12353@fledge.watson.org>
References:  <20101112223715.GA1356@freebsd.org>	<20101113112447.GF2392@deviant.kiev.zoral.com.ua>	<20101113115900.GA14975@freebsd.org>	<20101113122853.GG2392@deviant.kiev.zoral.com.ua>	<20101113123846.GA21390@freebsd.org>	<20101113124146.GH2392@deviant.kiev.zoral.com.ua>	<20101113124758.GA23469@freebsd.org> <alpine.BSF.2.00.1011132206380.12353@fledge.watson.org>

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On 11/13/10 2:08 PM, Robert Watson 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).

we did have some people working on an ethernet version of the 
dcons/remote debugging stuff
I guess it only supports a small subset of ethernet chips though..
Anyone know the status of that work?


> Robert
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