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[Graeme <graeme@xxxxxxx>]

Just retested on a fresh install of 15.04 x64 with the nvidia-346
drivers, problem still exists. In between the two nvidia-smi runs shown,
I just switched to the text console with ctl-alt-f1, and then switched
back to X.

graeme@galvatron:~⟫ nvidia-smi 
Tue Aug 11 15:48:00 2015       
+------------------------------------------------------+                       
| NVIDIA-SMI 346.59     Driver Version: 346.59         |                       
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|===============================+======================+======================|
|   0  GeForce GTX 960     Off  | 0000:01:00.0     N/A |                  N/A |
|  0%   58C    P8    N/A /  N/A |   1148MiB /  2047MiB |     N/A      Default |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                       GPU Memory |
|  GPU       PID  Type  Process name                               Usage      |
|=============================================================================|
|    0            C+G   Not Supported                                         |
+-----------------------------------------------------------------------------+
graeme@galvatron:~⟫ nvidia-smi 
Tue Aug 11 15:48:08 2015       
+------------------------------------------------------+                       
| NVIDIA-SMI 346.59     Driver Version: 346.59         |                       
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|===============================+======================+======================|
|   0  GeForce GTX 960     Off  | 0000:01:00.0     N/A |                  N/A |
|  0%   59C    P0    N/A /  N/A |    526MiB /  2047MiB |     N/A      Default |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                       GPU Memory |
|  GPU       PID  Type  Process name                               Usage      |
|=============================================================================|
|    0            C+G   Not Supported                                         |
+-----------------------------------------------------------------------------+


** Also affects: nvidia-graphics-drivers-346 (Ubuntu)
   Importance: Undecided
       Status: New

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to nvidia-graphics-drivers-331 in Ubuntu.
https://bugs.launchpad.net/bugs/1409110

Title:
  nvidia binary driver leaks vram like crazy

Status in nvidia-graphics-drivers-331 package in Ubuntu:
  Invalid
Status in nvidia-graphics-drivers-346 package in Ubuntu:
  New

Bug description:
  Using the nvidia-smi tool, you can see how much VRAM the binary driver
  is using for the card. However, with the current latest driver in
  Ubuntu 14.10, the results aren't good. Just using desktop apps (no
  OpenGL apart from what Unity and Chrome naturally use), and the driver
  has consumed over a GB of VRAM:

  graeme@galvatron:~⟫ sudo nvidia-smi 
  [sudo] password for graeme: 
  Fri Jan  9 11:58:06 2015       
  +------------------------------------------------------+                       
  | NVIDIA-SMI 331.38     Driver Version: 331.38         |                       
  |-------------------------------+----------------------+----------------------+
  | GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
  | Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
  |===============================+======================+======================|
  |   0  GeForce GTX 570     Off  | 0000:01:00.0     N/A |                  N/A |
  | 40%   43C  N/A     N/A /  N/A |   1047MiB /  1279MiB |     N/A      Default |
  +-------------------------------+----------------------+----------------------+
                                                                                 
  +-----------------------------------------------------------------------------+
  | Compute processes:                                               GPU Memory |
  |  GPU       PID  Process name                                     Usage      |
  |=============================================================================|
  |    0            Not Supported                                               |
  +-----------------------------------------------------------------------------+

  However, you can tell that this is caused by some sort of driver leak,
  since if you jump to the fb console with ctl-alt-f1, and then alt-tab
  back to X, the VRAM usage drops dramatically:

  graeme@galvatron:~⟫ sudo nvidia-smi 
  Fri Jan  9 11:58:27 2015       
  +------------------------------------------------------+                       
  | NVIDIA-SMI 331.38     Driver Version: 331.38         |                       
  |-------------------------------+----------------------+----------------------+
  | GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
  | Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
  |===============================+======================+======================|
  |   0  GeForce GTX 570     Off  | 0000:01:00.0     N/A |                  N/A |
  | 40%   45C  N/A     N/A /  N/A |    483MiB /  1279MiB |     N/A      Default |
  +-------------------------------+----------------------+----------------------+
                                                                                 
  +-----------------------------------------------------------------------------+
  | Compute processes:                                               GPU Memory |
  |  GPU       PID  Process name                                     Usage      |
  |=============================================================================|
  |    0            Not Supported                                               |
  +-----------------------------------------------------------------------------+

  
  The upshot of this is that, right now, I have to dump to the fb console and back before using any OpenGL apps, or they often fail with OpenGL memory allocation errors.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: nvidia-331 331.38-0ubuntu7
  ProcVersionSignature: Ubuntu 3.16.0-25.33-generic 3.16.7
  Uname: Linux 3.16.0-25-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Jan  9 12:01:56 2015
  SourcePackage: nvidia-graphics-drivers-331
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.modprobe.d.nvidia.331.hybrid.conf: [deleted]

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