I have a notebook with an external monitor plugged in and enabled via xrandr in X. If I switch to some text console (VT1), the vtconsole driver takes over control and enables the internal and external monitor on the VT (default behaviour). If I now unplug the external monitor and switch back to X my system does not respond to keyboard input anymore. It responds to "ping", though (at least sometimes). SSH'ing to the machine works but no sh prompt is started, instead the ssh program hangs after passing the password/private-key. Sometimes the system doesn't respond to input at all.

I use the most recent 2.6.37 kernel with a custom configuration. I run the intel video driver with KMS enabled so my vt-console driver uses framebuffers. Since "xrandr" cannot disable monitors when VT7 (or the corresponding graphical VT) is not active (or at least I can't get it work), my current fix is to kill X when udev reports an event on my external monitor and /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-VGA-1/status is "disconnected". However, this is quite ugly.


Steps to reproduce:
- start X session with xf86-video-intel and KMS enabled on VT7
- run xrandr --output <internal_monitor> --auto
- run xrandr --output <external_monitor> --auto
- (probably restart your window manager to adjust settings to external monitor)
- run chvt 1
- unplug external monitor
- run chvt 7
-> System is unstable and shows unexpected behaviour; sometimes it even stops responding to any kind of input.

attached file:
config: kernel config