On Wed, 1 Jun 2011 17:35:17 +1000 David Seikel <[email protected]> wrote:
> On Wed, 1 Jun 2011 16:10:30 +0900 Carsten Haitzler (The Rasterman) > <[email protected]> wrote: > > > On Wed, 1 Jun 2011 13:28:47 +1000 David Seikel <[email protected]> > > said: > > > > > > a kernel panic... is definitely a kernel problem. just > > > > unplugging some usb device being used for sure! dont know if > > > > ecore_fb handles teh vanishing of the device properly (and then > > > > dynamic plugging in again later). > > > > > > Well no. It only panics when elementary_test is running. If it's > > > just sitting at the shell prompt, no problem, things just keep > > > running fine. And no idea about if I plug it back in again, since > > > I don't get a chance to before the panic. > > > > a kernel panic, by DEFINITION is a KERNEL problem. its a bug inside > > the kernel. userspace happens to TRIGGER the bug by maybe using > > devices in a certain way - eg opening and keeping the udb device > > open. as such kernel and userspace are separated and any kernel > > panic is entirely a bug inside the kernel. > > > > > On the other hand, I don't KNOW for sure if it's a kernel panic, > > > since elementary_test has taken over the screen at that point, > > > there is no visible console to see any messages. The system just > > > reboots. > > > > oooh.. so you dont KNOW its a kernel panic... you don't have a > > serial console? you should get one :) > > > > > I think that classifies as "ecore_fb not handling the vanishing of > > > the device properly" though. > > > > well it may not handle the error case for reading the device as > > nicely as it should - eg close it and clean up. it may keep it open, > > which may TRIGGER a kernel bug, but thats still a kernel bug to be > > fixed in the kernel, if it is a panic. > > Doesn't hurt to let the EFL experts know there might be a problem in > a little used part of the code. Some one more familiar with that part > than me might give it a quick look and have an "aha!" moment. > > > > This linux system is one I'm building from scratch, just enough so > > > far to let me run elementary_test in fb mode. Plumbing in > > > debugging stuff so I can see what goes on is still a TODO item. I > > > just got to the point where elementary_test is reacting to the > > > keyboard last night, next step is supposed to be writing a simple > > > elementary app to start testing with. > > > > get yourself a serial console.. and next network (usbnet or > > something). you'll really hurt a lot without these debug/access > > mechanisms. > > Working on it. Network is "real soon now". Serial console means > buying more hardware, all existing serial ports are in use. They are > not as common as they used to be. ugh > > This particular problem is just falling through the cracks of my usual > debugging methods. > Ah, not a kernel problem at all. Something else was rebooting the system, elementary was just crashing. I'll have error messages soon. -- A big old stinking pile of genius that no one wants coz there are too many silver coated monkeys in the world.
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