http://who-t.blogspot.com/search?updated-min=2008-01-01T00%3A00%3A00%2B10%3A30&updated-max=2009-01-01T00%3A00%3A00%2B10%3A30&max-results=11
Sparked by this
thread, here's a list of X input facts in random order.
- The
evdev driver is the preferred input driver. If you are not running
Linux, then evdev is not available for you and you can keep using the
mouse/kbd drivers.
- If you are running Linux, you can
keep using the mouse/kbd driver if you wish, but configuration
adjustments need to be made. See below for details.
- By
default, the X server will expect a device list at runtime from HAL.
You can turn this behaviour off by using Option "AutoAddDevices" "off"
in the ServerLayout, or by disabling HAL at configure time. HAL is
not required to use X.
- If
HAL is enabled, then the mouse/kbd drivers are disabled. Otherwise, you
will get duplicate devices. If you want to use mouse/kbd, disable HAL.
- Devices
only get added if they have the input.x11_driver option set (check
lshal). For mice and keyboards, evdev is the default, drivers such as
linuxwacom or synaptics provide their own fdi.
- Any other options need to be added with the key
"input.x11_options.foobar" and must be of type string.
- Devices
specified in the xorg.conf will not be available after unplugging and
replugging them, but will become available again after a VT switch or a
resume.
- XKB options are specified by HAL, not by the server.
- The
evdev driver will prevent you from adding the same event device twice.
The synaptics driver does too. Evdev will not prevent you from adding
/dev/input/mice and /dev/input/event1 at the same time.
- HAL will prevent you from adding the same UDI.
- AutoAddDevices specifies whether to add devices through HAL
(default on).
- AutoEnableDevices specifies whether to enable such devices
immediately (default on).
- AllowEmptyInput
specifies if a mouse/kbd section if none is present is required (if AEI
is on -> no mouse/kbd required, disables mouse/kbd if present in the
xorg.conf). AllowEmptyInput defaults to (AutoAddDevices &&
AutoEnableDevices)
- Synaptics SHM or other options can
be enabled in the FDI file with the key "input.x11_options.SHMConfig"
(or likewise). Options have to be type string.
- Synaptics has improved a lot in regards to autoconfiguration and
you probably won't need half of your options anymore.
- For
every default setting that annoys you there's at least one person that
loves it. For every default setting that you find appropriate, there's
at least one person hating it. Become an active contributor, then you
get to decide on what the defaults are.
- Storing configuration in HAL's fdi file is not the best solution
but the best we have right now.
- The
old system worked, because you only ever had one mouse and one keyboard
in X. Now you can have multiple of each, independently configured. This
is why we switched to HAL for hotplugging and autoconfiguring.
- Ranting and/or commenting on some blog won't get your issues
fixed. Filing a bug may.
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