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[Docs] Add note about torch pkg and cusparse #1303

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Nov 29, 2016
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[Docs] Add note about torch pkg and cusparse #1303

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13 changes: 13 additions & 0 deletions docs/UbuntuInstall.md
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Expand Up @@ -74,6 +74,19 @@ Shut down the server before installing a driver, and then restart it afterwards:
The DIGITS server runs as `www-data`, so keep in mind that prebuilt LMDB datasets used for generic models need to be readable by the `www-data` user.
In particular, the entire chain of directories from `/` to your data must be readable by `www-data`.

#### Torch and cusparse

There is at least one Torch package which is missing a required dependency on cusparse.
If you see this error:
```
/usr/share/lua/5.1/cunn/THCUNN.lua:7: libcusparse.so.7.5: cannot open shared object file: No such file or directory
```
The simplest fix is to manually install the missing library:
```sh
% sudo apt-get install cuda-cusparse-7-5
% sudo ldconfig
```

#### Other

If you run into an issue not addressed here, try searching through the [GitHub issues](https://github.com/NVIDIA/DIGITS/issues) and/or the [user group](https://groups.google.com/d/forum/digits-users).