All things Ubuntu

Tom M
Tom M
Joined: 2 Feb 06
Posts: 941
Credit: 1,601,390,220
RAC: 3,889,986
Topic 225452

At Gary's suggestion, I am starting an Ubuntu thread topic.

This thread does not allow OS bashing.

It is here to be helpful.

I will freely admit I have had "variable" levels of success using Linux.  And because there are several BOINC friends of mine who use Ubuntu I have fallen into using it.

Don't get me wrong.  I have tried to use Ubuntu variants Zorin, Lubuntu, etc.  But I have returned to the base Ubuntu to reduce my confusion.

Another thread that I think is useful is: https://einsteinathome.org/content/troubleshooting-ubuntu-20-and-fresh-install-amd-drivers

I believe that the Linux users of Nvidia video cards are having less trouble getting them installed.  The latest AMD Ubuntu gpu drivers seem to have fixed the issues that were discussed in the above thread.

Respectfully,

Tom M

Over the hill?  What hill?  I don't REMEMBER any hill...

 

 

 

 

petri33
petri33
Joined: 4 Mar 20
Posts: 56
Credit: 517,914,494
RAC: 5,152,852

Hi,I'm running Ubuntu

Hi,

I'm running Ubuntu with two GTX 1080, one RTX 280Ti and one Titan V.

Experiences:

1) After an update of the NVIDIA official drivers I have to manually revert back to an old X11 init file, Otherwise my screen is black, no mouse no nothing.

2) To get GPU fan and mem/GPU settings to work I use: nvidia-xconfig -a --cool-bits="28"

3) I know how to use LD_PRELOAD on this system. I need it to get my system to intercept certain OpenCL calls to replace the standard O3AS OpenCL GPU kernels with my own. I nowadays run 2 at a time, and you can verify by yourselves if my task run times are in line with what you expect them to be. Each task has a log file that tells what kind of GPU was used.

..

Petri33

 

 

 

Keith Myers
Keith Myers
Joined: 11 Feb 11
Posts: 1,229
Credit: 1,569,651,360
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Your no video symptom is

Your no video symptom is caused by the coolbits tweak to the xorg.conf file because it re-enumerates the busID's of the multiple video cards.

To prove it to yourself, the next time this happens, simply unplug the monitor cable from the standard card driving the monitor and move it to the other cards in the system to find the desktop output.

To prevent this from happening do this:

Make a backup of the xorg.conf file before you update the video drivers.  Then after installing the new video driver but BEFORE you reboot the new kernel to use them, look at the new xorg.conf file and compare it to your backup xorg.conf file.

You will see that the busID of the card driving the monitor has been switched to one of the other cards in the system.  Either edit the file to swap the busID back to what they were before the video driver update or simply copy the xorg.conf backup file back over the xorg.conf file.

Only then go ahead and reboot and you will not have any issue with the video output changing to a different card.

Most everyone I know that uses the coobits tweak with multiple cards has experienced this issue.

 

petri33
petri33
Joined: 4 Mar 20
Posts: 56
Credit: 517,914,494
RAC: 5,152,852

Thanks Keith.

Thanks Keith.

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