Search found 113 matches

by puleglot
Thu Aug 20, 2020 4:35 pm
Forum: System Tuning and Configuration
Topic: Why two rtirq entries?
Replies: 8
Views: 507

Re: Why two rtirq entries?

This was explained here:
viewtopic.php?f=27&t=21821
by puleglot
Thu Aug 20, 2020 4:06 pm
Forum: System Tuning and Configuration
Topic: How much RT optimization is still needed?
Replies: 31
Views: 1050

Re: How much RT optimization is still needed?

Drumfix wrote:
Wed Aug 19, 2020 9:42 pm
Easy. All devices use the first allocated irq of an xhci host controller. Simply because the use of xhci secondary event rings and allocation of devices/enpoints to them has never been implemented.
Thanks! That explains a lot.
by puleglot
Tue Aug 18, 2020 11:15 pm
Forum: System Tuning and Configuration
Topic: How much RT optimization is still needed?
Replies: 31
Views: 1050

Re: How much RT optimization is still needed?

turbidh20 wrote:
Fri Jul 31, 2020 10:39 am
As you can see, IRQ 47 is the busiest, even though I can find nothing immediately attached to it.
I bet that it's a sound card. :) But I don't know how to find mapping between devices connected to xhci controller and their IRQs.
by puleglot
Tue Aug 18, 2020 11:01 pm
Forum: System Tuning and Configuration
Topic: How much RT optimization is still needed?
Replies: 31
Views: 1050

Re: How much RT optimization is still needed?

Also note that udev-rtirq (https://github.com/jhernberg/udev-rtirq) doesn't work correctly for xhci.
by puleglot
Tue Aug 18, 2020 10:47 pm
Forum: System Tuning and Configuration
Topic: How much RT optimization is still needed?
Replies: 31
Views: 1050

Re: How much RT optimization is still needed?

turbidh20 your method of finding IRQ doesn't work for xHCI controllers. These controllers use MSI/MSI-X interrupts and allocate dedicated interrupt for each connected device (at least my old uPD720202 do). 02:00.0 USB controller: Renesas Technology Corp. uPD720202 USB 3.0 Host Controller (rev 02) (...
by puleglot
Sat Aug 15, 2020 12:42 am
Forum: Computer Related Hardware
Topic: Focusrite Scarlett Gen 3 4i4 (and others)
Replies: 70
Views: 11564

Re: Focusrite Scarlett Gen 3 4i4 (and others)

summers wrote:
Sun Aug 02, 2020 11:19 am
So the synch type seems different from the other Gen 3 devices - seems a bit odd.
This is in line with Gen 2 devices: only interfaces with digital I/O work in asynchronous mode.
by puleglot
Wed Jul 15, 2020 7:54 am
Forum: Computer Related Hardware
Topic: Motu M2 USB Interface on Linux
Replies: 26
Views: 5695

Re: Motu M2 USB Interface on Linux

One notice that if I use PulseAudio and select for output to M2 and play Youtube in browser (chrome), after I switch to input to Motu youtube starts to hang It shows loading circle but it can't load video, the same happen if I open another tab. Fixed only when I switch input to another device and r...
by puleglot
Sun Jul 12, 2020 7:14 am
Forum: System Tuning and Configuration
Topic: "Server synchronous mode" Option in Jack - What is it doing?
Replies: 7
Views: 359

Re: "Server synchronous mode" Option in Jack - What is it doing?

lilith wrote:
Sat May 16, 2020 5:03 pm
Is it normal that I cannot do any selection for the Clock Source setting? Does one need this?
My interface is the Roland Rubix 24.
Roland Rubix doesn't have a digital input or word clock input, so it can only use internal clock.
by puleglot
Wed Jun 10, 2020 2:22 am
Forum: Computer Related Hardware
Topic: Scarlett 18i20 gen 3 Linux - Crackling Audio
Replies: 93
Views: 5842

Re: Scarlett 18i20 gen 3 Linux - Crackling Audio

Also I doubt that 18i8 will work correctly with my patch. I should probably add additional filtering of sample rates on the output interface for this device.
by puleglot
Wed May 20, 2020 4:44 pm
Forum: Computer Related Hardware
Topic: Scarlett 18i20 gen 3 Linux - Crackling Audio
Replies: 93
Views: 5842

Re: Scarlett 18i20 gen 3 Linux - Crackling Audio

Updated patch. Added Scarlett 18i8 3rd Gen. Also slightly changed the way to get altsetting.
by puleglot
Wed May 20, 2020 2:31 pm
Forum: System Tuning and Configuration
Topic: Saffire 6 USB 1.1 no inputs available in Jack [ SOLVED ]
Replies: 19
Views: 618

Re: Saffire 6 USB 1.1 no inputs available in Jack

Mr (or Mrs) Puleglot. Thank you so much for your help with this. If there's any other testing I can help with please ask. Oh, just remembeerd - I get a lot of "unable to change format on ep #82" messages when the usb-audio module is loaded, but it doesn't seem to affect anything. Thanks for testing...
by puleglot
Wed May 20, 2020 1:58 pm
Forum: Computer Related Hardware
Topic: Scarlett 18i20 gen 3 Linux - Crackling Audio
Replies: 93
Views: 5842

Re: Scarlett 18i20 gen 3 Linux - Crackling Audio

These errors: "Unable to change format on ep ..." should be fixed by the following patch:
https://git.kernel.org/pub/scm/linux/ke ... 80c63bf77f
But it is not fixing all the problems with implicit feedback AFAIS.
by puleglot
Wed May 06, 2020 12:10 am
Forum: Computer Related Hardware
Topic: Ultralite AVB
Replies: 417
Views: 49536

Re: Ultralite AVB

Patch for pcm.c with added check for subs->interface >= 0. @bluebell could you test it?