this sounds pretty resonable to me. at first thought, it seems to me that all this should be hidden inside the vt/console/usb layer with no X interraction required.
i guess i'd like some details on how you see the subsystems interracting (vt, console, Xorg, usb devices, etc) before i can provide detailed feedback. ed On Fri, Nov 07, 2008 at 05:45:30PM +0800, Aaron Zang wrote: > Hi all, > > During the implementation of Xorg VT (virtual console) support, > a problem has been discovered when Xorg physically opens a USB > keyboard (/dev/usb/hid*). > > By default Xorg on Solaris opens the virtual keyboard device > (/dev/kbd). The virtual keyboard (conskbd) creates two minor nodes > thus has two streams. One is the internal minor node which is linked > under console stream, the other is /dev/kbd which is for the use > of applications. > Say Xorg is running on /dev/vt/7, when /dev/vt/7 is made active, > Xorg uses KIOCSDIRECT to route conskbd IO to /dev/kbd stream. > And it will route the IO back when switching away to consoles. > > HID driver creates two minor nodes for a USB keyboard too. > One minor node is internal used and the stream is plumbed under > conskbd, the other is /dev/usb/hidx. > When Xorg is configured to open /dev/usb/hidx as keyboard device, > the internal stream is unplugged from conskbd automatically. > So when switching from Xorg session back to console session, the > console will not get any input from this keyboard. > And Xorg can not close /dev/usb/hidx, since it has already dropped > the privilege and running as a normal user at this moment. If Xorg > closes /dev/usb/hidx when switching away, it loses the privilege > to reopen the keyboard device when switching back. > > So the proposal here is to add a new ioctl to the hid driver for > keyboard devices which has the similar routing functionality as > KIOCSDIRECT does to conskbd driver. > > Before I am preparing any official documents, I would like to > discuss it with the following purposes: > > 1) Is there any existing way to resolve this? > 2) Is there any better solution? > > Edward and Alan, your comments are more than welcomed. > > Thanks a lot. > Aaron > > -- > You know some birds are not meant to be caged, their feathers are just too > bright.
