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[Pauli Virtanen <pauli.virtanen@xxxxxx>]

More information: when Xorg is consuming CPU on the first login, when I
switch to another VT, the VT switches immediately back to X. I also
cannot use the "Switch to another user" feature. Like so:

1. Ctrl+Alt+SysRQ+R  (release keyboard)
2. Alt+F1 (switch VT)
3. In a fraction of a second, VT switches back to X. VT1 only flashes by.

This does not happen on the second login: there, VT stays at VT1 and does not switch back by itself.
Is it possible that part of Xorg is running in some busy-loop, constantly switching the VT?

I cannot easily attach a gdb to Xorg due to the VT problem. I may try
setting up some ssh setup later on.

-- 
xorg takes 100% cpu -- but only on first login
https://bugs.launchpad.net/bugs/437607
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