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Message boards : Graphics cards (GPUs) : NVidia beta driver 337.12 for Linux introduces fan control and overclocking using coolbits

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Message 36192 - Posted: 10 Apr 2014 | 9:10:52 UTC

http://www.phoronix.com/scan.php?px=MTY1OTM&page=news_item

I installed the new beta driver (317.12)

Option "Coolbits" "8" enables overclocking
Option "Coolbits" "12" enables overclocking and manual fan control

Execute the command below add "Coolbits" "12" to your xorg.conf file.

sudo nvidia-xconfig --cool-bits=12


It all seems to work for my 780Ti.

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Message 36213 - Posted: 10 Apr 2014 | 18:10:38 UTC - in response to Message 36192.

Hello: I do not work (it is actually 337.12) this driver, BOINC does not recognize my GPU (GTX770) on my Ubuntu 14.04 64bit Kernel-LowLatency.

Can you confirm if it works well on your system?.

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Message 36217 - Posted: 10 Apr 2014 | 22:07:14 UTC - in response to Message 36213.

Sorry about the typo. The Driver version is 337.17.

Boinc recognizes my 780Ti and has finished 2 WUs with the new driver. I've tried reducing the graphics clock offset and it does work.

My OS is linux Mint cinnamon 16 (64-bit)

I'll try my other systems this weekend (GTX570 and GTX660Ti).

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Message 36224 - Posted: 11 Apr 2014 | 10:35:55 UTC

The beta driver 337.12 also works another computer with the same OS but different GPU (660Ti). At any rate, it's nice to be able to overclock/underclock my graphics cards in linux.

Is there any way to edit my first post and title to change my error in driver version number?

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Message 36225 - Posted: 11 Apr 2014 | 10:52:14 UTC - in response to Message 36224.
Last modified: 11 Apr 2014 | 10:52:28 UTC

Not sure where you got the 337.12 Beta from? The main Beta is the 337.50 version, released on the 7th Apr '14.

Might try it over the weekend...
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Message 36226 - Posted: 11 Apr 2014 | 10:57:31 UTC - in response to Message 36225.

Not sure where you got the 337.12 Beta from? The main Beta is the 337.50 version, released on the 7th Apr '14.

Might try it over the weekend...


337.50 is main Beta for Windows. For linux 64 bit, the latest beta choice is 337.12 which was released on April 8th.

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Message 36227 - Posted: 11 Apr 2014 | 12:25:19 UTC - in response to Message 36226.

Yeah, I see that now. Maybe their search facility reset my OS back to W7 because I was working from a W7 system, or their .uk site wasn't quite right.
Title fixed.
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Message 36233 - Posted: 11 Apr 2014 | 14:03:45 UTC

I was running nvidia-331.49 on an Optimus notebook without any problem. I've just updated the drivers and couldn't get Boinc run with any of 331.67, 334 and 337 drivers. Maybe it would run it as main GPU but couldn't get it run with Bumblebee.
I reverted to the older 331.20 driver and it's running a GIANNI WU with %100 usage of one hyper threaded CPU core. I don't know whether it is sth. with the workunit or driver.

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Message 36241 - Posted: 11 Apr 2014 | 22:21:57 UTC - in response to Message 36233.


Hello: In UBUNTU 14.04-64 bits totally clean, reinstalled, all NVIDIA Drivers 331.49 post are not recognized by BOINC, works but no GPUs. available.

So far I have had to return to the Nvidia 331.38 or 331.49 versions that work perfectly in both Ubuntu and Boinc.

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Message 36247 - Posted: 12 Apr 2014 | 7:46:48 UTC - in response to Message 36227.

Yeah, I see that now. Maybe their search facility reset my OS back to W7 because I was working from a W7 system, or their .uk site wasn't quite right.
Title fixed.


Thanks for correcting my mistake skgiven.

Linux mint 16 is based on Ubuntu Saucy. The 337.12 drivers and boinc version 7.2.42 are working fine on 2 systems with mint 16.

My 3rd system is running mint 13 LTS which is based on Ubuntu Precise. I'll try the new driver on that computer today.

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Message 36248 - Posted: 12 Apr 2014 | 10:58:06 UTC - in response to Message 36247.

Hi, For the moment Ubuntu 14.04-64 bits Trusty has a problem with BOINC.

I review again and reinstalled several times with different drivers and do not work 331.67, 334.21, 337.12. I've also tried several Kernels without result, not missing, I guess some library ...??

Which works perfectly on BOINC+Trusty is 331.49 even 331.38 GPUGRID works but gives errors.

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Message 36256 - Posted: 13 Apr 2014 | 9:56:45 UTC - in response to Message 36248.

I was able to get the 337.12 driver installed on my mint 13 LTS system with the GTX570 but it wasn't trivial. After installation, the screen would freeze with multicolor horizontal lines during the boot process. I discovered a discovered a solution by accident though. If I booted during recovery mode, I could make it to the menu which has a number of options. If I choose "resume normal boot", then it would boot into the desktop with a function driver. It's a bit cumbersome but since I rarely reboot the computer it's something I can live with.

Nvidia-settings shows the options for manual fan control and overclocking options and GPUGrid is running without errors so far.

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Message 36260 - Posted: 13 Apr 2014 | 11:34:52 UTC - in response to Message 36248.

Those recently updated drivers have some problems with CUDA or something else. I tested all of them in Kubuntu 13.10 and couldn't get the works started anyway. Log says Nvidia drivers present but no GPU's found.
I wanted to revert to older 331.49 driver but it is removed from the repo and I don't have its deb file. Repo has 331.20 and it is running the works but with one virtual core of the CPU %100 utilized.

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Message 36263 - Posted: 13 Apr 2014 | 18:21:29 UTC - in response to Message 36260.

Bumblebee bad!
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Message 36275 - Posted: 14 Apr 2014 | 11:11:15 UTC - in response to Message 36263.

Bumblebee bad!



Hello, Bumblebee is not installed and if installed (Ubuntu 14.04) breaks the system.

You can expand the information on this topic please.

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Message 36299 - Posted: 15 Apr 2014 | 10:08:51 UTC - in response to Message 36275.

Hello: Well ... in the end I managed to install the 337.12 also running BOINC and Option "Coolbits" "12" enables overclocking and manual fan control.

The only way that has worked has been a manual installation and in the process indicate that the NO Driver Nvidia Kernel register, the rest of the options during installation (included install 32bit libraries) must be accepted.

So far it works well and I've completed a task successfully GPUGRID Short.

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Message 36357 - Posted: 17 Apr 2014 | 17:05:11 UTC - in response to Message 36263.

I found a 331.38 driver, now Boinc can use the GPU and with no extreme CPU load. I think the problem is not with Bumblebee only.

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Message 36378 - Posted: 18 Apr 2014 | 9:33:19 UTC - in response to Message 36357.
Last modified: 18 Apr 2014 | 9:37:33 UTC

I found a 331.38 driver, now Boinc can use the GPU and with no extreme CPU load. I think the problem is not with Bumblebee only.



Hello: True, there are problems in Linux (Ubuntu) with Nvidia drivers after version 331.49 (which is what works best) I've mounted all and not work with BOINC,if installed normally.

For now my advice is to not update the driver to keep to themselves and that works, see if the next version of Ubuntu 14.04 Final solves ...¡¡¡¡¡¡

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Message 36401 - Posted: 18 Apr 2014 | 21:17:13 UTC - in response to Message 36378.

I read problems with 14.04 beta versions, but LS version is out now. Now, I downloaded 14.04 and after a long time taking backup I will try it. :)

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Message 36426 - Posted: 19 Apr 2014 | 5:55:45 UTC - in response to Message 36378.

Now, I'm running Kubuntu 14.04 and most of the things running perfect. When installing bumblebee it installed nvidia-331-updates which is nvidia-331.38 by default. I even didn't add the edgars repositories.
Now Boinc is able to detect CUDA and OpenCL
I tried updating but couldn't succeed due to sth. nvidia-persistenced... Tried formatting and had no problems during the installation and after except a single thing.
My integrated graphics seem to have some problem now. It runs glxgears etc. but can't find libgl in boinc and have some display quality issues.

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Message 36460 - Posted: 20 Apr 2014 | 11:59:12 UTC - in response to Message 36426.
Last modified: 20 Apr 2014 | 12:00:34 UTC

Hello: The final version of Ubuntu 14.04 LTS install the Nvidia Driver 331.67 and the result is that BOINC is not GPUs.

Currently the only solution is still manually install the driver. During installation no Registering the NVIDIA Kernel Module with DKMS so that everything works properly.

I trust that as the problem is detected by all BOINC users UBUNTU the issue is resolved.

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Message 36539 - Posted: 22 Apr 2014 | 14:32:51 UTC - in response to Message 36460.

I installed Bumblebee and it installed 331.38 driver which is the driver I used in 13.10 after breaking it with 331.67. In fact that is an old driver, 331.49 was running fine but I couldn't find it after updating to 331.67.

Try installing 331.38 and I think it should run. It is in the software center.

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Message 36668 - Posted: 26 Apr 2014 | 12:45:00 UTC - in response to Message 36539.

After messing up two stable Ubuntu rigs (13.04 and 13.10 which used 331.49 and did work with CUDA6 at least at one time) trying to manually install drivers, I eventually managed to upgrade one system to 14.04.
Unfortunately the only drivers available via repositories either don't work with CUDA6 or the Boinc Client can't see the GPU's!

I tried coolbits, sudo nvidia-xconfig --cool-bits=12, and it does let you change the fan speed of the first card (but not the second). Not that it's any use when Boinc can't see the GPU's. Didn't see any option to change frequencies (OC/DC).
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Message 36670 - Posted: 26 Apr 2014 | 14:11:10 UTC - in response to Message 36668.

After messing up two stable Ubuntu rigs (13.04 and 13.10 which used 331.49 and did work with CUDA6 at least at one time) trying to manually install drivers, I eventually managed to upgrade one system to 14.04.
Unfortunately the only drivers available via repositories either don't work with CUDA6 or the Boinc Client can't see the GPU's!

I tried coolbits, sudo nvidia-xconfig --cool-bits=12, and it does let you change the fan speed of the first card (but not the second). Not that it's any use when Boinc can't see the GPU's. Didn't see any option to change frequencies (OC/DC).


Hi: There is a problem with Vidia and higher to 331.49 drivers causing BOINC not find the GPUs and the OpenCL libraries.

We have already commented in this section, this reported to Nvidia and hopefully someone to acknowledge the mess they have mounted. see for example:
Boinc + Ubuntu + Nvidia = No usable GPUs found.

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Message 36671 - Posted: 26 Apr 2014 | 15:23:25 UTC
Last modified: 26 Apr 2014 | 15:25:22 UTC

I finally stumbled upon a sequence of commands to get the 337.12 beta drivers installed in Ubuntu 14.04. So far they are working fine with BOINC 7.2.42 from Berkeley.

Uninstall any proprietary drivers that you have installed now.

Download the Nvidia driver

Create a file in your home directory to blacklist Nouveau drivers
Use gedit to create a file named blacklist-nouveau.conf
Add the following lines to blacklist-nouveau.conf

blacklist nouveau
blacklist lbm-nouveau
options nouveau modeset=0
alias nouveau off
alias lbm-nouveau off

Save the file and exit gedit

Now you need to be in a terminal session without the GUI up and running. There are a couple of ways to do that. Option 1 is to shut down the Ubuntu GUI "lightdm". Option 2 is to boot into recovery mode. I used option 2.

Option 1

open a terminal session and enter the following command
sudo lightdm stop

The screen should go blank (black)
Hit <ctrl><alt>then <f1>
A prompt should appear where you can log into the system
Enter your login credentials and you should be in terminal mode.

Option 2 is to reboot the computer into Ubuntu recovery mode
https://wiki.ubuntu.com/RecoveryMode
To get the files mounted in read/write mode I select the option on the recovery mode menu to Enable networking (also remounts files in read/write mode)
Once that is finished, select the recovery mode menu option for Enter into terminal mode

In terminal mode without the GUI running, enter the following commands. In the command, substitute the name that you use on your computer for the italicized "name" in the "cd" command. The "dir" command will give you a list of all the files in your Download folder so you can see exactly the name of the NVIDIA installer file. In the "sudo sh" command use the name of the NVIDIA install file in your Downloads folder.
cd /home/[i]name[/i]/Downloads
dir
sudo sh NVIDIA-Linux-x86_64.....run

I selected "yes" to Registering the NVIDIA Kernel Module with DKMS.
If the drivers install successfully enter the next command to move the blacklist-nouveau.conf file to the /etc/modprobe.d folder where it will be automatically invoked during boot up.
sudo mv /home/[i]name[/i]/blacklist-nouveau.conf /etc/modprobe.d

Reboot the machine by entering
sudo shutdown now -r

At this point, it worked fine for me. I did read somewhere that if the window comes up black, boot back onto recovery mode and issue the following command
sudo nvidia-xconfig


Hope that works for you.

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Message 36674 - Posted: 26 Apr 2014 | 15:47:41 UTC - in response to Message 36671.

Hi: Thanks - captainjack - for the information, put into practice in the next round of tests.

For my part I have working perfectly BOINC Nvidia 337.12 and 331.67 on my two Ubuntu 14.04 machines (with different Kernels) but with the difference that I have NOT registered with DKMS during installation.

Anyway both its solution as mine no longer an interim patch.

You can not be a normal user perdir entering this trouble, it is unfortunate, Nvidia and Ubuntu-Canonical have to give any definitive soilución.

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Message 36676 - Posted: 26 Apr 2014 | 16:47:29 UTC

Thanks for the instructions captainjack.

It seems it's always a hassle to install the latest Nvidia drivers on linux.

There are some useful tidbits in the nvidia README file.

http://us.download.nvidia.com/XFree86/Linux-x86_64/331.67/README/index.html

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Message 36680 - Posted: 26 Apr 2014 | 21:30:23 UTC - in response to Message 36671.

Thanks captainjack, that worked for me!

First, I removed all of my repository drivers:
- From Ubuntu 14.04's system settings, Software & Updates, other software.
- From a terminal (Ctrl+Alt+T) sudo apt-get purge nvidia*

Then I largely followed your instructions,

To get the drivers (from a Terminal) I used,
wget us.download.nvidia.com/XFree86/Linux-x86_64/337.12/NVIDIA-Linux-x86_64-337.12.run

To make the drivers executable, from a Terminal, I used,
sudo chmod +x NVIDIA-Linux-*-337.12.run

Again from a Terminal I used sudo /etc/init.d/lightdm stop

- I've 'inter-weaved' a couple of notes into your instructions for Verbosity, each begin with a dash - just in case someone can't follow the instructions.
PM me if anything is amiss as I can edit my posts any time.

I finally stumbled upon a sequence of commands to get the 337.12 beta drivers installed in Ubuntu 14.04. So far they are working fine with BOINC 7.2.42 from Berkeley.

Uninstall any proprietary drivers that you have installed now.

Download the Nvidia driver
-
From NVidia site - should automatically download into your downloads folder


Create a file in your home directory to blacklist Nouveau drivers
Use gedit to create a file named blacklist-nouveau.conf
Add the following lines to blacklist-nouveau.conf
blacklist nouveau
blacklist lbm-nouveau
options nouveau modeset=0
alias nouveau off
alias lbm-nouveau off

Save the file and exit gedit

-
Open a Terminal (Ctrl+Alt+T)
cd /home/name
gedit blacklist-nouveau.conf


Now you need to be in a terminal session without the GUI up and running. There are a couple of ways to do that. Option 1 is to shut down the Ubuntu GUI "lightdm". Option 2 is to boot into recovery mode. I used option 2.

Option 1

open a terminal session and enter the following command
sudo lightdm stop

The screen should go blank (black)
Hit <ctrl><alt>then <f1>
A prompt should appear where you can log into the system
Enter your login credentials and you should be in terminal mode.

Option 2 is to reboot the computer into Ubuntu recovery mode
https://wiki.ubuntu.com/RecoveryMode
To get the files mounted in read/write mode I select the option on the recovery mode menu to Enable networking (also remounts files in read/write mode)
Once that is finished, select the recovery mode menu option for Enter into terminal mode

In terminal mode without the GUI running, enter the following commands. In the command, substitute the name that you use on your computer for the italicized "name" in the "cd" command. The "dir" command will give you a list of all the files in your Download folder so you can see exactly the name of the NVIDIA installer file. In the "sudo sh" command use the name of the NVIDIA install file in your Downloads folder.
cd /home/[i]name[/i]/Downloads
dir
sudo sh NVIDIA-Linux-x86_64.....run


-
sudo sh NVIDIA-Linux-x86_64.....run
Had to use the full,
sudo sh NVIDIA-Linux-x86_64-337.12.run


I selected "yes" to Registering the NVIDIA Kernel Module with DKMS.
If the drivers install successfully enter the next command to move the blacklist-nouveau.conf file to the /etc/modprobe.d folder where it will be automatically invoked during boot up.
sudo mv /home/[i]name[/i]/blacklist-nouveau.conf /etc/modprobe.d

Reboot the machine by entering
sudo shutdown now -r

At this point, it worked fine for me. I did read somewhere that if the window comes up black, boot back onto recovery mode and issue the following command
sudo nvidia-xconfig


Hope that works for you.


Someone might want to note that BM's Event Log now says,
CUDA: NVIDIA GPU 0: GeForce GTX670 (driver version unknown, CUDA version 6.0....

IMO While 337.12 is the latest Beta, 334.21 was released 7 weeks ago, and using a repository package is supposed to make things easier!

Switching from a repo to a manual installation isn't exactly handy either - get it wrong and you will find yourself staring at a black screen (hardly noob friendly)!

Again, Thanks.
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Message 36681 - Posted: 26 Apr 2014 | 21:53:55 UTC

Hey skgiven,

Glad to hear that the install instructions worked for you. That makes two of us that have used them successfully.

Couple of follow up comments.

When I issue the "sudo sh NVIDIA-Linux...." command I have to use the full file name also. I left the .... in there in case anyone else wants to use a different driver version. I've read that a person can issue the command "sudo sh NVIDIA*" and it will run whatever it finds that starts with NVIDIA. That's probably ok if there is only one NVIDIA driver in the Downloads folder.

I looked through your other comments and they all look appropriate.

Thanks for the feedback and updated instructions. Hopefully they are clear enough that other people can follow.

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Message 36689 - Posted: 27 Apr 2014 | 14:13:53 UTC - in response to Message 36681.
Last modified: 27 Apr 2014 | 14:14:55 UTC

Hello: At the moment -captainjack- following in their footsteps, not the NVIDIA driver achievement was recorded in the Kernel with DKMS, possibly due to the use KernelLowLatency 3.14.1.031.401 uy that certainly works well and fast.

Anyway it's a minor problem because it all work perfectly, NVIDIA 337.12 including BOINC.

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Message 36708 - Posted: 28 Apr 2014 | 13:34:51 UTC - in response to Message 36689.
Last modified: 28 Apr 2014 | 13:36:12 UTC

Hello: At the moment -captainjack- following in their footsteps, not the NVIDIA driver achievement was recorded in the Kernel with DKMS, possibly due to the use KernelLowLatency 3.14.1.031.401 uy that certainly works well and fast.

Anyway it's a minor problem because it all work perfectly, NVIDIA 337.12 including BOINC.


Hello: As presupposed using normal Ubuntu 14.04 kernel (3.13 ...) if you can record the Nvidia driver in the Kernel by DKMS. the Kernel (> 3.14 ...) do not require registration.

Unfortunately the result is practically the same, recorded or not, the new Nvidia drivers and Ubuntu running on BOINC continue but require manual updates.

Nvidia is sagging updates by using the Additional Drivers, I hope next updates Ubuntu + Nvidia solutions this.


Note: Personally I would recommend using the 331.67 driver before the 337.12 since this is a Beta and its operation is not all good.

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Message 36730 - Posted: 29 Apr 2014 | 21:58:15 UTC - in response to Message 36725.

Note: Personally I would recommend using the 331.67 driver before the 337.12 since this is a Beta and its operation is not all good.

The problem here is that 331.67 fails CUDA6 WU's.


331.67 is working fine with cuda6 tasks on my machines, as is 337.12 & 331.49

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Message 36732 - Posted: 29 Apr 2014 | 23:14:26 UTC - in response to Message 36725.

The problem here is that 331.67 fails CUDA6 WU's.


Hello: The Nvidia driver 331.67 works perfectly on the CUDA 6 tasks, which causes problems with this version of Cuda is above 331.38.

I have completed several tasks CUDA 6 on my computer with this driver (331.67) on Ubuntu 14.04.

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Message 36738 - Posted: 30 Apr 2014 | 14:31:13 UTC

Is Nvidia driver 331.67 working with CUDA 6 tasks on Linux?

Thanks Jim

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Message 36739 - Posted: 30 Apr 2014 | 14:50:30 UTC - in response to Message 36738.

Is Nvidia driver 331.67 working with CUDA 6 tasks on Linux?

Thanks Jim



Hello: As has been repeated 331.67 works perfectly on Linux and supports CUDA 6.

I recommend that you read as installed in this thread and "Boinc + Ubuntu + Nvidia = No usable GPUs found.".

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Message 36807 - Posted: 7 May 2014 | 19:34:53 UTC

Now that summer is upon us, I needed to speed up the fan a bit. I tried the command that biodoc recommended in the first post

sudo nvidia-xconfig --cool-bits=12

and that didn't work for me. I had to manually edit the /etc/X11/xorg.conf file and insert a line for coolbits at the following location:

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
Option "Coolbits" "12"
EndSection


Now I am able to control fan speed with the Nvidia X Server Settings software.

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Message 36808 - Posted: 7 May 2014 | 19:45:09 UTC - in response to Message 36807.
Last modified: 7 May 2014 | 19:48:57 UTC

Now that summer is upon us, I needed to speed up the fan a bit. I tried the command that biodoc recommended in the first post

sudo nvidia-xconfig --cool-bits=12

and that didn't work for me. I had to manually edit the /etc/X11/xorg.conf file and insert a line for coolbits at the following location:

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
Option "Coolbits" "12"
EndSection


Now I am able to control fan speed with the Nvidia X Server Settings software.


Hi: If it works, you need a script ... is two ... -- (together but two.)

sudo nvidia-xconfig -- cool-bits = 12

NOTE: Sorry I looked on my screen that only had a script, but I see you are both.

Anyway it works for me perfectly.

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Message 36909 - Posted: 27 May 2014 | 3:52:21 UTC

anyone have fan control working on more than one card with these drivers?

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Message 36911 - Posted: 27 May 2014 | 11:12:15 UTC - in response to Message 36909.
Last modified: 27 May 2014 | 11:47:04 UTC

anyone have fan control working on more than one card with these drivers?



Hello: Yes, I in Ubuntu 14.04 with GTX770 and GT640 control enabled by the two fans NvidiaSettings.

I have already explained in another thread on this site (I can not remember which) how to do this goes for any other Nvidia driver.

O each card is connected to a monitor (if no monitor no fan control) or you must install a virtual screen on the card with no monitor.

The solution requires hardware and software must be mounted on the output video monitor emulator (resistors) and edit the file "/ etc/X11/xorg.conf".

Can not find the specific thread I can repeat the instructions here, or at least I have the solution if there is no other variant. Greetings.


Note: 337.12 or 337.19 are a bit unstable, do not recommend, the better a previous, I'm using the 331.79 fine with BOINC 7.2.42 and CUDA 60 working.

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Message 36930 - Posted: 28 May 2014 | 14:14:41 UTC

Next challenge:

I finally stepped up and bought a motherboard that would support 3 GPU's. It currently has a GTX660ti and a GTX770 installed. There is a monitor attached to each GPU. It is running Ubuntu 14.04 and BOINC 7.2.42. I was able to get the 337.12 drivers installed and get it set up with coolbits enabled so I can control the fan speeds on each GPU.

Now I want to get the second monitor that is attached to GPU #2 to actually work. In NVIDIA X Server Settings is an option for Xinerama. With that option turned off, the screen on the second monitor is black. When I move the mouse to that screen, it shows up as a black X outlined in white.

When I turn the Xinerama option on, the second monitor shows the background and the menu bar down the left side of the screen. I can move a window from the first screen to the second screen or I can select a menu option from the second screen and open up that window on the second screen. But here is the bizarre part: When I open up a new window on either monitor, all other open windows on both monitors go black. For example, I can open up BOINC Manager and see it just fine. If I leave it open and then open up a Firefox window, the BOINC Manager window goes black. If I then open up a terminal session, both the BOINC Manager and Firefox windows are black and the terminal session can be seen. I can "grab" the bar at the top of a black window and move it around but it is still black. However, if I grab the edge of a black window and resize the window, all of the contents of the window will show up and whatever else was active goes black.

Does any body know what settings to tweak to make both monitors work and be able to see all open windows all the time?

Thanks for all the help,
captainjack

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Message 36935 - Posted: 28 May 2014 | 16:49:04 UTC - in response to Message 36930.

Ubuntu Unity is based on Compiz and compiz has never worked completely OK with multiple monitors. Ubuntu does make it significantly more stable and robust to work with multiple monitors, but it cannot cover every possible setup. You're using two GPUs, if you had your monitors on a single GPU, things would be much better.

I think your best bet is to use another desktop environment than Unity (Ubuntu's default), one that does not depend on Compiz. You can try something like XFCE or MATE.
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