Module realcap is not included with linux-image*

Bug #111086 reported by simonp
10
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Invalid
Undecided
Unassigned
linux-source-2.6.20 (Ubuntu)
Won't Fix
Undecided
Unassigned

Bug Description

Binary package hint: linux-source-2.6.20

In Ubuntu 6.10, realtime-lsm has been deprecated in favor to the realcap module. This was great: no more module recompiling after a kernel upgrade. jackd was ready to to run in realtime.

Alas, linux-image-2.6.20-15* don't include realcap any more, which is sad. Someone have to recompile the kernel in order to get realtime support.

$ ls /lib/modules/2.6.17-11-generic/kernel/security/
capability.ko commoncap.ko realcap.ko root_plug.ko seclvl.ko
$ ls /lib/modules/2.6.20-15*/kernel/security/
/lib/modules/2.6.20-15-386/kernel/security/:
capability.ko commoncap.ko root_plug.ko

/lib/modules/2.6.20-15-generic/kernel/security/:
capability.ko commoncap.ko root_plug.ko

/lib/modules/2.6.20-15-lowlatency/kernel/security/:
capability.ko commoncap.ko root_plug.ko

Please include agan the realcap module. It makes using jack not fun.

Revision history for this message
Launchpad Janitor (janitor) wrote : This bug is now reported against the 'linux' package

Beginning with the Hardy Heron 8.04 development cycle, all open Ubuntu kernel bugs need to be reported against the "linux" kernel package. We are automatically migrating this bug to the new "linux" package. However, development has already began for the upcoming Intrepid Ibex 8.10 release. It would be helpful if you could test the upcoming release and verify if this is still an issue - http://www.ubuntu.com/testing . If the issue still exists, please update this report by changing the Status of the "linux" task from "Incomplete" to "New". We appreciate your patience and understanding as we make this transition. Thanks!

Revision history for this message
simonp (simonp) wrote :

Since it's possible to edit /etc/security/limits.conf to get jack running with realtime privileges, it's not a necessity anymore, this bug could be closed.

Note: just add these to /etc/security/limits.conf:
@audio - rtprio 99
@audio - memlock 500000
@audio - nice -10

Revision history for this message
Leann Ogasawara (leannogasawara) wrote :

The Ubuntu Kernel Team is planning to move to the 2.6.27 kernel for the upcoming Intrepid Ibex 8.10 release. As a result, the kernel team would appreciate it if you could please test this newer 2.6.27 Ubuntu kernel. There are one of two ways you should be able to test:

1) If you are comfortable installing packages on your own, the linux-image-2.6.27-* package is currently available for you to install and test.

--or--

2) The upcoming Alpha5 for Intrepid Ibex 8.10 will contain this newer 2.6.27 Ubuntu kernel. Alpha5 is set to be released Thursday Sept 4. Please watch http://www.ubuntu.com/testing for Alpha5 to be announced. You should then be able to test via a LiveCD.

Please let us know immediately if this newer 2.6.27 kernel resolves the bug reported here or if the issue remains. More importantly, please open a new bug report for each new bug/regression introduced by the 2.6.27 kernel and tag the bug report with 'linux-2.6.27'. Also, please specifically note if the issue does or does not appear in the 2.6.26 kernel. Thanks again, we really appreicate your help and feedback.

Revision history for this message
Michele Mangili (mangilimic) wrote :

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!

Changed in linux:
status: Incomplete → Invalid
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