Gentoo Forums
Gentoo Forums
Gentoo Forums
Quick Search: in
Why do some graphics drivers cause xruns?
View unanswered posts
View posts from last 24 hours

 
Reply to topic    Gentoo Forums Forum Index Multimedia
View previous topic :: View next topic  
Author Message
audiodef
Watchman
Watchman


Joined: 06 Jul 2005
Posts: 6279
Location: /usr/lib64/lv2

PostPosted: Fri Feb 02, 2018 3:04 pm    Post subject: Why do some graphics drivers cause xruns? Reply with quote

I might be using the wrong subject line due to a lack of understanding, but I would appreciate help understanding.

So here's what I want to know:

I have a computer that functions as my primary digital audio workstation. It runs Gentoo Studio and uses JACK. If I go with the bare-bones defaults and let Xorg handle everything, using Nouveau/nv drivers - which is the default for Gentoo Studio - I get many xruns, often two per second. If I downgrade rt-sources to 4.9 and emerge nvidia-drivers - I forget the version but it works with rt-sources 4.9 - and eselect opengl to this driver, I never get xruns even at a latency of 5 ms.

Note that rt-sources 4.9 and Nouveau/nv causes xruns, so I'm ruling out the kernel sources as the culprit. I think - I dunno, I'm not an expert at this aspect of things.

Also note that this applies to Nvidia graphics. I have the same installation of Gentoo Studio on machines not using Nvidia and this is not an issue.

So what is it about using the open-source Nvidia drivers that causes xruns where using the proprietary driver does not?
_________________
Gentoo Studio: A Gentoo-based, professional digital audio workstation OS.
Back to top
View user's profile Send private message
krinn
Watchman
Watchman


Joined: 02 May 2003
Posts: 6875

PostPosted: Fri Feb 02, 2018 5:46 pm    Post subject: Reply with quote

-> https://www.alsa-project.org/main/index.php/XRUN_Debug
(sorry can't do better)
Back to top
View user's profile Send private message
audiodef
Watchman
Watchman


Joined: 06 Jul 2005
Posts: 6279
Location: /usr/lib64/lv2

PostPosted: Fri Feb 02, 2018 9:25 pm    Post subject: Reply with quote

Thanks, krinn. I know nothing about how this works, so I wouldn't know what to do with this info. But I'm bookmarking it in case it's useful in my search for edification. Appreciate it. :)

EDIT: I came across at least one post elsewhere mentioning that open-source nvidia drivers cause xruns, so it's not quite a case of something funny on one particular system.
_________________
Gentoo Studio: A Gentoo-based, professional digital audio workstation OS.
Back to top
View user's profile Send private message
Display posts from previous:   
Reply to topic    Gentoo Forums Forum Index Multimedia All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum