it' also creating issues on the desktop for jackd and pulseaudio/rtkit,
see bug #1875665, could the change be reverted in the standard kernel
configuration?
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Actually this problem could be worked out without disabling of
CONFIG_RT_GROUP_SCHED
Jack has separate page for that with simple instructions
https://github.com/jackaudio/jackaudio.github.com/wiki/Cgroups
I guess jack2 maintainers could include those config file(s) into package so
user may not
This bug was fixed in the package linux - 5.4.0-26.30
---
linux (5.4.0-26.30) focal; urgency=medium
* focal/linux: 5.4.0-26.30 -proposed tracker (LP: #1873882)
* Packaging resync (LP: #1786013)
- update dkms package versions
* swap storms kills interactive use (LP:
** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/1873315
Title:
5.4.0-24.28 does not seem to apply rtprio, whereas -21 does.
To
** Tags added: patch
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Title:
5.4.0-24.28 does not seem to apply rtprio, whereas -21 does.
To manage notifications about this bug go to:
** Description changed:
Impact:
Software that requires RT priority is not working anymore since we
turned on RT_GROUP_SCHED:
commit 9b039fc517876d312e7fa0955571101a299c91f5
Author: Seth Forshee
Date: Mon Apr 6 07:11:44 2020 -0500
UBUNTU: [Config] CONFIG_RT_GROUP_SCHED=y
** Description changed:
+ Impact:
+
+ Software that requires RT priority is not working anymore since we
+ turned on RT_GROUP_SCHED:
+
+ commit 9b039fc517876d312e7fa0955571101a299c91f5
+ Author: Seth Forshee
+ Date: Mon Apr 6 07:11:44 2020 -0500
+
+ UBUNTU: [Config] CONFIG_RT_GROUP_SCHED=y
Suggested solution (discussed in #ubuntu-kernel on 2020-04-17): revert
RT_GROUP_SCHED config change in the lowlatency kernel?
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Title:
It works! Happy times!
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Title:
5.4.0-24.28 does not seem to apply rtprio, whereas -21 does.
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** Attachment added: "photo_2020-04-17_11-58-46.jpg"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1873315/+attachment/5356035/+files/photo_2020-04-17_11-58-46.jpg
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As xwax requires you to have relevant hardware, here's a workaround to
try if "rtprio" works for you:
1) sudo apt install jackd1
2) add "@audio - rtprio 99" to /etc/security/limits somewhere
3) make sure you're in the audio group
4) new login/shell
5) run "jackd -d alsa"
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I've posted some test kernel with the RT_GROUP_SCHED option turned off
here:
https://people.canonical.com/~ppisati/lp1873315/
can you test it?
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