Recent linux kernel bug causing problem for xkbcomp

[Peter Hutterer]

On Tue, Jan 24, 2012 at 03:33:36PM -0800, walt wrote:
> Hi team.  I'm trying to debug a recent commit to Linus's git repo
> that causes startx to halt with a complaint that it can't write a
> .xkm file to /var/lib/xkb.
> 
> I'm assuming that the message is from xkbcomp, but I can't find
> where in the startx process that xkbcomp is run, or what else might
> produce such an error message.  I'd like to reproduce the error by
> running xkbcomp manually so I can track it down.

the xserver calls it via popen(3) in XkbDDXCompileKeymapByNames, , see
xserver/xkb/ddxLoad.c

Cheers,
  Peter