cgminer suddenly stopped working?

[Praxis]

Give me this warning:

[2013-05-12 17:22:23] Started cgminer 2.11.3
 [2013-05-12 17:22:24] ADL found less devices than opencl!
 [2013-05-12 17:22:24] There is possibly more than one display attached to a GPU

 [2013-05-12 17:22:24] Use the gpu map feature to reliably map OpenCL to ADL
 [2013-05-12 17:22:24] WARNING: Number of OpenCL and ADL devices did not match!
 [2013-05-12 17:22:24] Hardware monitoring may NOT match up with devices!

It's a headless Xubuntu Linux based mining rig.

After those warnings, only 1 or sometimes 2 GPUs work, not all three like usual.

[os2sam]

Give me this warning:

[2013-05-12 17:22:23] Started cgminer 2.11.3
 [2013-05-12 17:22:24] ADL found less devices than opencl!
 [2013-05-12 17:22:24] There is possibly more than one display attached to a GPU

 [2013-05-12 17:22:24] Use the gpu map feature to reliably map OpenCL to ADL
 [2013-05-12 17:22:24] WARNING: Number of OpenCL and ADL devices did not match!
 [2013-05-12 17:22:24] Hardware monitoring may NOT match up with devices!

It's a headless Xubuntu Linux based mining rig.

After those warnings, only 1 or sometimes 2 GPUs work, not all three like usual.

Sounds like this thread.

https://bitcointalk.org/index.php?topic=178241.msg1857068#msg1857068