Tesla K20 and remote 3D rendering

I have a Tesla K20c that I am trying to use with Nice Software DCV, which is a remote 3D rendering application (basically enables 3D acceleration over VNC, similar to VirtualGL). I am having trouble with my xorg.conf. X fails to start completely if I use normal settings:

Section “Device”
Identifier “Device6”
Driver “nvidia”
VendorName “NVIDIA Corporation”
BoardName “Tesla K20c”
BusID “PCI:131:0:0”
EndSection

Section “Screen”
Identifier “Screen6”
Device “Device6”
Monitor “Monitor6”
DefaultDepth 24
Option “UseDisplayDevice” “None”
SubSection “Display”
Virtual 1920 1200
Depth 24
EndSubSection
EndSection

If I add Option “NoAccel” to the Screen section, X will start, but when I try to run an OpenGL app, I get a segfault. I am running the latest driver release (here’s my nvidia-smi -q

GPU 0000:83:00.0
Product Name : Tesla K20c
Display Mode : Disabled
Persistence Mode : Disabled
Driver Model
Current : N/A
Pending : N/A
Serial Number : 0324712003170
GPU UUID : GPU-c4714f28-90e2-32be-936d-73f7a63f64b6
VBIOS Version : 80.10.14.00.02
Inforom Version
Image Version : 2081.0204.00.07
OEM Object : 1.1
ECC Object : 3.0
Power Management Object : N/A
GPU Operation Mode
Current : N/A
Pending : N/A
PCI
Bus : 0x83
Device : 0x00
Domain : 0x0000
Device Id : 0x102210DE
Bus Id : 0000:83:00.0
Sub System Id : 0x098210DE
GPU Link Info
PCIe Generation
Max : 2
Current : 1
Link Width
Max : 16x
Current : 16x
Fan Speed : 30 %
Performance State : P8
Clocks Throttle Reasons
Idle : Active
User Defined Clocks : Not Active
SW Power Cap : Not Active
HW Slowdown : Not Active
Unknown : Not Active
Memory Usage
Total : 4799 MB
Used : 21 MB
Free : 4778 MB
Compute Mode : Default
Utilization
Gpu : 0 %
Memory : 0 %
Ecc Mode
Current : Enabled
Pending : Enabled
ECC Errors
Volatile
Single Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Double Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Aggregate
Single Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Double Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Temperature
Gpu : 22 C
Power Readings
Power Management : Supported
Power Draw : 26.26 W
Power Limit : 225.00 W
Default Power Limit : 225.00 W
Min Power Limit : 150.00 W
Max Power Limit : 225.00 W
Clocks
Graphics : 324 MHz
SM : 324 MHz
Memory : 324 MHz
Applications Clocks
Graphics : 705 MHz
Memory : 2600 MHz
Max Clocks
Graphics : 758 MHz
SM : 758 MHz
Memory : 2600 MHz
Compute Processes : None

Any input would be helpful. Thanks!

I would attach the nvidia-bug-report, but It doesn’t seem to want to let me attach the .gz file. I’ll provide it via email if needed.

The Tesla K20c is a compute-only device and does not support graphics.