Re: [I810fb-user] X server dying

[Antonino D. <ad...@po...>]

On Tue, 2002-05-21 at 04:20, Bryan Stillwell wrote:
> Lately I've been having problems with by X server dying using the
> i810fb-lite driver (v0.23) and XFree86 (v4.1.0.1), and I'm curious if
> anyone else has experienced this problem and is it fixed in the latest
> version?  It seems to only happen after switching back and forth from a
> FB-based application and a X application a number of times.  The last
> few lines of XFree86.0.log on a couple of the crashes give some more
> information:
> 
That problem is a known one. It's not really an fb problem, more of X's.
It's worse before since it also crahed i810fb.  Now, X will just crash
but i810fb will survive.  It's usually some X application that stresses
the graphics device (try loading mozilla, and before it finishes
loading, switch to the console, then wait -- sooner or later X will
crash).

The reason, I think, this happens is because X assumes that it is the
sole owner of the graphics device.  So when you switch to the console,
fb has taken over the graphics device, but X is probably still
processing some graphics request although it is already out of context.
The correct behavior would be for X to finish all requests before
switching, or do the processing in background without touching the
hardware.

I think you can minimize this problem by letting X finish drawing before
switching to the console, (ie, if you have mozilla, let it finish first.
Not all apps do that though, I know for sure mozilla and evolution. 
Probably openoffice too). Disabling DRI will also help a lot, since it's
not really a very nice player.

Tony 


> 
> I imagine this could also be related to the modified kernel that I'm
> running (2.4.19-pre5 with the preemptable kernel patch and the
> low-latency kernel patch applied.)  I just wanted to see if anyone else
> has had this problem before I dig into the problem anymore.
> 
Probably not.  That problem is known to me, and I probably gave some
hints about it in one of the docs I've made.

> Thanks,
> Bryan
> 
> -- 
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