#2198 BLOC Untriag: X grabs input devices, doesn't let HAL grab them instead

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#2198: X grabs input devices, doesn't let HAL grab them instead
-----------------------------+----------------------------------------------
 Reporter:  cjb              |       Owner:  cjb                              
     Type:  defect           |      Status:  new                              
 Priority:  blocker          |   Milestone:  Untriaged                        
Component:  x window system  |     Version:  Development build as of this date
 Keywords:                   |    Verified:  0                                
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 I modified HAL to perform the grab ioctl, so that X doesn't exclusively
 grab the power management input device out from under it.  I added this
 code (line 381):

 {{{
         if (g_ascii_strncasecmp("/dev/input/event0", device_file, 17) ==
 0)
         {
                 HAL_DEBUG (("grabbing event0\n"));
                 if (ioctl(g_io_channel_unix_get_fd(channel), EVIOCGRAB,
 (void *)1) < 0)
                         HAL_DEBUG (("ioctl EVIOCGRAB failed"));
         }
 }}}

 But, when I do this, X fails to start up:
 {{{
 (II) evdev brain: Rescanning devices (4).
 (**) Option "AlwaysCore"
 (**) Keyboard-olpc_pm/input0: always reports core events
 (II) Keyboard-olpc_pm/input0: Unable to grab device (Device or resource
 busy).
 Cowardly refusing to check use as keyboard.
 (EE) Keyboard-olpc_pm/input0: Don't know how to use device.
 (II) UnloadModule: "evdev"
 (EE) PreInit failed for input device "Keyboard"
 }}}

 It seems X can't handle the device being missing, even though it isn't the
 main keyboard.  Zephaniah says this will be fixed with the
 respeclaration/X 1.4 work, eventually.  In the meantime, he's given me an
 "evil" xorg.conf to use instead, attached.

 We need the HAL patch (which I'm still working on) and xorg.conf change in
 our build before we can get OHM to properly handle button presses while X
 is active.

-- 
Ticket URL: <http://dev.laptop.org/ticket/2198>
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