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[Philippe Lefevre <555169@xxxxxxxxxxxxxxxxxx>]

For some time I have a keyboard issue at boot. It is relatively close to what I've read here.
I think this issue appeared after a Lucid Lynx kernel upgrade. Before, it worked fine.

Till GDM is displayed, the keyboard works well (usb Dell keyboard). I can enter my login and password.
X11 starts and the keyboard is not usable anymore (but the mouse is still working).
I have to unplug/replug the usb keyboard and all goes well after that.
There are no errors in the kernel or X11 logs.
While I believed it was a trouble due to the usb dialog, I raised a ticket to launchpad (Bug #82368) where I found some similar cases.
I registers there my logs.

Recently I traced my keyboard inputs with "input_events" (from my laptop
connected to my machine), and I can see that, even if apparently nothing
happen, the data from the keyboard are well transmitted. So the problem
is probably not due neither to the usb dialog nor the keyboard itself.
It seems due to the fact that when X starts, it reset the keyboard
somewhere but it leaves it in a bad state.

This issue is permanent for me. If I can do some other test for you to help, I'll do it. Just let me know your needs. (I can use gdb and eventually recompile X11)
Is there any documentation that could help me to understand what X11R7 does after startx is launched. (there is a lot of documentation but very old)

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https://bugs.launchpad.net/bugs/555169

Title:
  [lucid] Keyboard and mouse freeze after grub, usb and PS/2 keyboard not working in X (after upgrade? bad-upgrade to lucid)