Bug#564324: xserver-xorg-input-evdev: Xorg SEGFAULT with evdev module

[Agustin Martin <agmartin@debian.org>]

On Wed, Jan 13, 2010 at 04:05:26PM +0000, Julien Cristau wrote:
> On Wed, Jan 13, 2010 at 16:19:25 +0100, Agustin Martin wrote:
> 
> > Finally found the reason for this problem, kernel evdev module was not
> > loaded. I have worked around this by explicitly adding evdev to
> > /etc/modules in my sid box.
> > 
> > However, until last weekend/this week, it was automagically loaded, with no
> > need for explicit inclusion into /etc/modules. What has changed in this time
> > to trigger the problem?
> > 
> It's autoloaded just fine here, and apparently for everyone else,
> without touching /etc/modules.  No clue.

I finally found what I think is causing evdev not be loaded, and that is
related to my system being non-standard, so I will fix that locally. 

I do not know which exact xserver-xorg change made that happens, but I do
not think that is very relevant now. More details follow in case I am not 
the only one setting this kind of non-standard systems.  

In my system I have different partitions for different dists (sid, ...) and
all the boot+kernel+modules stuff is at a different place. Each dist
partition has proper symlinks, and special code is added to /etc/init.d to
make sure partition containing /lib/modules is mounted just before
/etc/init.d/module-init-tools is run and unmounted afterwards, before 
/etc/init.d/checkfs is run, so /etc/modules is honoured. Things are
mounted again later according to /etc/fstab.

The problem in my system is that with the above setup udev init scripts
are run way before /lib/modules is mounted and so evdev module is not 
loaded by udev because is not found.  

I have to see what is the best workaround for this in my system. Having
evdev in /etc/modules seems simpler, but I have to investigate other
possibilities, like mounting before /etc/init.d/udev is run.

Sorry for the noise and thanks a lot for the feedback.

Cheers,
 
-- 
Agustin