Back again ;)

On 01/22/2012 04:40 AM, Mulyadi Santosa wrote:

Hi again :)

On Sat, Jan 21, 2012 at 16:58, Graeme Russ [off-list ref] wrote:

quoted

Tell me about it :( - I've been here before, just not with the Linux kernel

At least I can tell you will get hiccup less :) Anyway, you do have
data backup, right? Just in case it causes corrupt and you lose some
of your data. Better safe than sorry...

I have /home and a separate HDD :)

quoted

I got netconsole working and it took a while to crash, but it finally did
and guess what - No oops :(

Ok, no luck....how about serial console? same result? (I am not sure
which one will be helpful in your case).

Haven't tried serial console - not convinced it will help (see below)

Just crossing my mind, is this bug also happen if you work strictly in
text console i.e no X Window at all?

quoted

I've added more (see attached config)

quoted

From what I can see at a glance, you already enabled enough debugging

features....so just keep it that way at least for now.

quoted

Also, I am using a very recent tip of linus' branch (commit
ccb19d263fd1c9e34948e2158c53eacbff369344)

I think this is the way it will go, you would likely doing bisecting.
Thing is, you first need to find kernel version that works well. You
said you have trouble with 3.1.9-fc...how about 3.1.8 or below?

quoted

Hmmm, any way to test this theory?

Let's say, switching cpu governor? What do you use now? ondemand? then
try to switch to conservative. Or just lock the cpu frequency into
certain number.

I managed to make the system more unstable as I trimmed the kernel and
added debugging info. The symptoms were slightly different (graphic freezes
rather than flashing screen)

To isolate i915, I've installed a nVidia 8600GT from my old machine. Even
though I blacklisted i915, it still loads, so I've done an 'rmmod i915' to
force it out.

So far it all seems pretty stable - I'll leave it powered on for a few days
to make sure. I'm then going to buy an ATI 5450 (cheap and passively
cooled) and see how that goes.

After a week of uptime, I'll switch back to the i915 driver and see what
happens. If I get a hang, I'll get the i915 maintainer on board with my problem

I think the lack of any kernel messages is due to a hardware conflict which
hard-locks the machine. Even the reset button does not respond.

Regards,

Graeme