23 May
2005
23 May
'05
6:14 a.m.
Launching jack as a user, I can't get it to run with realtime privileges, and
I get lots of cracks and pops from my speakers.
As root, I can launch jack in realtime, and the pops/cracks disappear, but I
can't access the LADSPA plugins (this is a configuration issue that I could
resolve if I wanted to).
I note that SUSE have included the Capability LSM in their kernel as I get
"linux kernel: Capability LSM initialized" in the log file, but I don't know
whether this means:
- the realtime functionality just needs to be configured
- I need to build and install a separate realtime module, or
- I need to build or otherwise obtain a kernel specifically built
for realtime support
If at all possible, I'd like to do it without rebuilding the kernel myself,
but if I need to, I would be so grateful to hear from someone who's already
succeeded with this on SuSE 9.3.
Many thanks in advance.
--
David Haggett
23 May
23 May
7 a.m.
I note that SUSE have included the Capability LSM in their kernel as I
get "linux kernel: Capability LSM initialized" in the log file, but I
don't know whether this means:
- the realtime functionality just needs to be configured
- I need to build and install a separate realtime module, or
- I need to build or otherwise obtain a kernel specifically built
for realtime support
If at all possible, I'd like to do it without rebuilding the kernel
myself, but if I need to, I would be so grateful to hear from someone
who's already succeeded with this on SuSE 9.3.
I have SuSE 9.3 here on my P4/HT desktop box, which is running
2.6.11.4-20a tagged kernel. The way to go is installing kernel-source
package and apply the realtime-lsm patch to the kernel source tree. The
patch is here:
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc4/2…
Just (re)build and install the patched kernel, but take special care to
set the following, while on kernel configuration:
CONFIG_SECURITY_CAPABILITIES=N
CONFIG_SECURITY_REALTIME=M
To load the realtime module at init, I added the following lines to
/etc/init.d/boot.local:
# Realtime LSM name.
RTLSM=realtime
# Realtime group name.
RTGRP=audio
# Realtime LSM capabilities enabling module.
RTGID=`cat /etc/group | grep "^${RTGRP}:" | awk -F: '{print $3}'`
if [ -n "`modprobe -l ${RTLSM}`" ]; then
/sbin/modprobe ${RTLSM} gid=${RTGID} mlock=1
fi
Which boils down to this literal one, if you prefer the "hackish"-way :)
/sbin/modprobe realtime gid=17 mlock=1
Good luck.
--
rncbc aka Rui Nuno Capela
rncbc(a)rncbc.org
27 May
27 May
6:31 a.m.
On Monday 23 May 2005 09:57, Rui Nuno Capela wrote:
I have SuSE 9.3 here on my P4/HT desktop box, which is
running
2.6.11.4-20a tagged kernel. The way to go is installing kernel-source
package and apply the realtime-lsm patch to the kernel source tree. The
patch is here:
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc4/2
.6.12-rc4-mm2/broken-out/rt-lsm.patch
Thanks for your answer (and sorry took so long to respond).
Can you just clarify that I should install the SuSE kernel source package
matching my default kernel, (2.6.11.4-20a-default) and patch it using the
rt-lsm patch from 2.6.12-rc4-mm2, or did you mean to install the vanilla
2.6.12 source and apply the patch to that.
Sorry, I'm a bit dense when it comes to kernel building. I managed to make a
working one a couple of years ago, but just "to see if I could" rather than
to get some special functionality.
TIA
--
David Haggett
8:25 a.m.
David Haggett <david(a)haggett.demon.co.uk>uk>:
On Monday 23 May 2005 09:57, Rui Nuno Capela wrote:
David, I tried what Rui suggested. The above patch applies and fits in
despite the mismatch of kernel version. I didn't go through to actually
booting the kernel but I see no reason why it shouldn't boot. "make
oldconfig" is probably a real winner here because of suse's
patch-o-mania.
Wolfgang
I have SuSE 9.3 here on my P4/HT desktop box,
which is running
2.6.11.4-20a tagged kernel. The way to go is installing
kernel-source package and apply the realtime-lsm patch to the
kernel source tree. The patch is here:
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.
12-rc4/2 .6.12-rc4-mm2/broken-out/rt-lsm.patch
Thanks for your answer (and sorry took so long to respond).
Can you just clarify that I should install the SuSE kernel source
package matching my default kernel, (2.6.11.4-20a-default) and patch
it using the rt-lsm patch from 2.6.12-rc4-mm2, or did you mean to
install the vanilla 2.6.12 source and apply the patch to that.
6918
days inactive
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linux-audio-user@lists.linuxaudio.org
3 comments
3 participants
participants (3)
-
David Haggett -
Rui Nuno Capela -
Wolfgang Woehl