Description:

Attempts to run cuda-gdb as a normal user result in cuda-gdb reporting "fatal:
The CUDA driver initialization failed. (error code = 1)". Running with as root
via su or sudo produces correct results.

I have a multi-gpu system. I do all cuda development and debugging on the
non-display device. I've tested the same procedure in run level 3 from a
basic terminal and run level 5 inside X11.

Package versions:
- nvidia 304.43-1
- cuda-toolkit 4.2.9-1

Output from nvidia-smi:
Mon Sep 10 14:07:31 2012
+------------------------------------------------------+
| NVIDIA-SMI 4.304.43 Driver Version: 304.43 |
|-------------------------------+----------------------+----------------------+
| GPU Name | Bus-Id Disp. | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 Quadro FX 1700 | 0000:01:00.0 N/A | N/A |
| 60% 57C N/A N/A / N/A | 16% 82MB / 511MB | N/A Default |
+-------------------------------+----------------------+----------------------+
| 1 Tesla C2070 | 0000:02:00.0 Off | 0 |
| 32% 83C P8 N/A / N/A | 0% 11MB / 5375MB | 0% Default |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Compute processes: GPU Memory |
| GPU PID Process name Usage |
|=============================================================================|
| 0 Not Supported |
+-----------------------------------------------------------------------------+

Steps to reproduce:
- compile driver.cu with
$ nvcc -g -G -gencode arch=compute_20,code=sm_20 driver.cu -o driver
- run cuda-gdb as a normal user
$ cuda-gdb ./driver
...
(cuda-gdb) run
...
fatal: The CUDA driver initialization failed. (error code = 1)
(cuda-gdb)
- run cuda-gdb as a super user
$ sudo cuda-gdb ./driver
...
(cuda-gdb) run
...
vd[0] = 0
vd[1] = 1
...
Program exited normally.
...
(cuda-gdb)