On Fri, Jul 11, 2003 at 09:27:46PM +0100, Pigeon wrote: > On Fri, Jul 11, 2003 at 12:23:15PM -0400, Mark L. Kahnt wrote: > > My own > > suspicion is that it *could* be looking for the virtual console on which > > X11 is running, particularly if the virtual consoles are broken into > > multiple input and output file descriptors. > > Unfortunately neither /dev/tty7 nor /dev/tty-I-started-X-from appear > to be valid choices. > > Since my original post I've been poking through the source (a daunting > task; it's quite clearly written as source goes, but there's so f**g > much of it :-) ) I'm getting somewhere... if Option "Device" isn't > set, it uses the already-opened xf86Info.consoleFd, so an obvious next > possible step is to find where it opens that.
Which I have now done... it looks first in /dev/vc/* and then in /dev/tty* for the VT it's running on. So the answer is: "In a standard Debian installation, X's "default console keyboard input source" referred to in 'man 4 kbd' is /dev/tty7." > If Option "Device" is set, it takes the string as a filename and tries > to open it (in mode O_RDONLY | O_NONBLOCK | O_EXCL). The problem now > is to find out exactly what it expects to be reading from that... I > found some example code for a keyboard driver kernel module on the net > (apparently part of a programming course) and hacked it to buffer the > raw scancodes and present them on /dev/kbd. It's doing that OK, but if > I give it to X to read, I get *nothing*... Garbage, I could understand. And this turns out to be because I had Option "XKBDisable" "yes" set in the ServerFlags section of my XF86Config. If I enable XKB I can feed it raw scancodes from /dev/kbd and it works fine. So: "When using the Option "Device" "string" option of X's "kbd" driver to define a keyboard input device for X, make sure that XKB is enabled." Thanks for your time, Mark. -- Pigeon Be kind to pigeons Get my GPG key here: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x21C61F7F
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