7 Aug
2006
7 Aug
'06
6:24 a.m.
Hi
I just installed xubuntu 6.06 on my T41 laptop. When I start jack like
this: "jackstart -R -d alsa -p 64" I get:
jackstart: cannot get realtime capabilities, current capabilities are:
=ep cap_setpcap-e
probably running under a kernel with capabilities disabled,
a suitable kernel would have printed something like "=eip"
This is both with the stock kernel (2.6.15) and a 2.6.17 patched with
http://people.redhat.com/mingo/realtime-preempt/
Here's something from my .config:
atte@ajstrup:~$ grep PREEMPT /usr/src/linux/.config
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT_DESKTOP is not set
CONFIG_PREEMPT_RT=y
CONFIG_PREEMPT=y
CONFIG_PREEMPT_SOFTIRQS=y
CONFIG_PREEMPT_HARDIRQS=y
CONFIG_PREEMPT_BKL=y
CONFIG_PREEMPT_RCU=y
# CONFIG_DEBUG_PREEMPT is not set
# CONFIG_CRITICAL_PREEMPT_TIMING is not set
Another thing: Supposed I get the realtime kernel running, one of my usb
keyboards (evolution mk-449c) is not recognized (tried both vanilla
2.6.17 and with the patch applied + the 2.6.17.7 w/wout patch). When I
plug it in I get this in dmesg:
[ 500.792000] usb 2-2.1: new full speed USB device using uhci_hcd and
address 4
[ 500.916000] usb 2-2.1: no configuration chosen from 1 choice
Needless to say, my alsa configuration is exactly the same with all
kernels, here's my /etc/modprobe.d/alsa-base:
atte@ajstrup:~$ cat /etc/modprobe.d/alsa-base
# autoloader aliases
install sound-slot-0 modprobe snd-card-0
install sound-slot-1 modprobe snd-card-1
install sound-slot-2 modprobe snd-card-2
install sound-slot-3 modprobe snd-card-3
install sound-slot-4 modprobe snd-card-4
install sound-slot-5 modprobe snd-card-5
install sound-slot-6 modprobe snd-card-6
install sound-slot-7 modprobe snd-card-7
# Cause optional modules to be loaded above generic modules
install snd modprobe --ignore-install snd $CMDLINE_OPTS && { modprobe
-Qb snd-ioctl32 ; : ; }
install snd-pcm modprobe --ignore-install snd-pcm $CMDLINE_OPTS && {
modprobe -Qb snd-pcm-oss ; : ; }
install snd-mixer modprobe --ignore-install snd-mixer $CMDLINE_OPTS && {
modprobe -Qb snd-mixer-oss ; : ; }
install snd-seq modprobe --ignore-install snd-seq $CMDLINE_OPTS && {
modprobe -Qba snd-seq-midi snd-seq-oss ; : ; }
# Cause optional modules to be loaded above sound card driver modules
install snd-emu10k1 modprobe --ignore-install snd-emu10k1 $CMDLINE_OPTS
&& { modprobe -Qb snd-emu10k1-synth ; }
install snd-via82xx modprobe --ignore-install snd-via82xx $CMDLINE_OPTS
&& { modprobe -Qb snd-seq ; }
# Load saa7134-alsa instead of saa7134 (which gets dragged in by it anyway)
install saa7134 modprobe --ignore-install saa7134 $CMDLINE_OPTS && {
modprobe -Qb saa7134-alsa ; : ; }
# Prevent abnormal drivers from grabbing index 0
options snd-bt87x index=-2
options snd-atiixp-modem index=-2
options snd-intel8x0m index=-2
options snd-via82xx-modem index=-2
# i810
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
alias snd-card-0 snd-intel8x0
alias sound-slot-0 snd-card-0
# ua-1a
alias sound-service-1-0 snd-mixer-oss
alias sound-service-1-3 snd-pcm-oss
alias sound-service-1-8 snd-seq-oss
alias sound-service-1-12 snd-pcm-oss
alias snd-card-1 snd-usb-audio
alias sound-slot-1 snd-card-1
#evolution 1
alias snd-card-2 snd-usb-audio
alias sound-slot-2 snd-card-2
#evolution 2
alias snd-card-3 snd-usb-audio
alias sound-slot-3 snd-card-3
#evolution 2
alias snd-card-4 snd-usb-audio
alias sound-slot-4 snd-card-4
options snd-intel8x0 index=0
options snd-usb-audio index=1,2,3,4 vid=0x0582,0x0a4d,0x0a4d,0x0a4d
pid=0x0018,0x008e,0x008e,0x008f nrpacks=1
--
peace, love & harmony
Atte
7 Aug
7 Aug
6:51 a.m.
Le lundi 7 août 2006 10:24, Atte André Jensen a écrit :
jackstart: cannot get realtime capabilities,
here is mine :
CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT_DESKTOP is not set
CONFIG_PREEMPT_RT=y
CONFIG_PREEMPT=y
CONFIG_PREEMPT_SOFTIRQS=y
CONFIG_PREEMPT_HARDIRQS=y
CONFIG_PREEMPT_BKL=y
with 1000hz clock and others things ;)
so i thing it is not your kernel, but your security configuration.
i dont know well about ubuntu : on my rpm' distro, we are using PAM latest
version. (pre-config for audio).
It is possible you must specify what group can have access to realtime
capabilities, something like :
/etc/security.limits.conf
@audio - rtprio 99
@audio - nice -19
@audio - memlock 500000
(Off course, yours users must be in audio group -verify the gid on your
distro, here 81...) Additionnaly, you could simply use a user name.
@ for group
- 'wildcard' for all (you could write hard or soft only)
and specific vocabulary things for rtptio, nice and memlock stuff.
too, i had adjusted IRQ for my soundcards ;)
(other things in you mail seems good, no ?)
regards
yvan
10:07 a.m.
Atte André Jensen wrote:
The 1000 Hz setting audibly improves MIDI event timing, at least to my
ears. 250 Hz is really not good enough.
Best,
dp
with 1000hz
clock and others things ;)
Hmm, is that essential? What will that do?
atte@ajstrup:/boot$ grep HZ config-2.6.15-26-386
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
CONFIG_MACHZ_WDT=m 
11:17 p.m.
Dave Phillips wrote:
Atte André Jensen wrote:
The 1000 Hz setting audibly improves MIDI event timing, at least to my
ears. 250 Hz is really not good enough.
Best,
dp
That is very true. Ubuntu changed this setting from 1000 to 250 during
dapper development between 2.6.15_18 and 2.6.15_19. I have kept a
version of the 2.6.15_18 kernel around just for audio work. I have no
idea why the change.
Regards,
Bill
with
1000hz clock and others things ;)
Hmm, is that essential? What will that do?
atte@ajstrup:/boot$ grep HZ config-2.6.15-26-386
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
CONFIG_MACHZ_WDT=m 
11:26 p.m.
On Mon, 2006-08-07 at 21:16 -0400, Bill Allen wrote:
That is very true. Ubuntu changed this setting from
1000 to 250
during
dapper development between 2.6.15_18 and 2.6.15_19. I have kept a
version of the 2.6.15_18 kernel around just for audio work. I have no
idea why the change.
Upstream kernel changed the default "to save battery on laptops and
improve performance", and Ubuntu unfortunately went along.
Lee
10:21 a.m.
Le lundi 7 août 2006 13:16, Atte André Jensen a écrit :
bubar wrote:
On simple low-latency kernel option (origine from Mr Morton) or Preemptif
(origine Mr Love), i thing it is necessary, better, to have a 1000hz clock.
with a 250hz, launch rosegarden from term-emulator, and see RG complains about
clock. there is another option in kernel config to ""bypass"" , to
""help""
with a 250hz clock, but RG complains ever.) I thing it is better to choice
the 1000hz, especially for MIDI input/output/trough
with 1000hz clock and others things ;)
Hmm, is that essential? What will that do?
atte@ajstrup:/boot$ grep HZ config-2.6.15-26-386
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
CONFIG_MACHZ_WDT=m 
10:43 a.m.
bubar said:
with a 250hz, launch rosegarden from term-emulator,
and see RG complains
about
clock. there is another option in kernel config to ""bypass"" , to
""help""
with a 250hz clock, but RG complains ever.)
I had this error with Rosegarden and rebuilt my kernel with HZ=1000.
Rosegarden still complains. What could I be doing wrong?
uname -a indicates I am running the newly built kernel, and I've checked
my .config to prove I saved the setting. Maybe there is a way to query the
running kernel for the value of HZ?
--
Michael Pacey
11:47 a.m.
Le lundi 7 août 2006 14:36, Michael Pacey a écrit :
bubar said:
are you sure you are in
audio group ?
and second, forget to turn off the hpet kernel option ?
finally, on which kernel ? (in 2.6.17, the Mr Gleixnar & Mr Molnar clock time
patch make clock near one nanosecond, and add the tickless stuff, too.)
http://marc.theaimsgroup.com/?l=linux-kernel&m=115064343409061&w=3
(note in RT patch from Molnar, there is another clock stuff i thing. So we
dont need this one)
with a 250hz, launch rosegarden from
term-emulator, and see RG complains
about
clock. there is another option in kernel config to ""bypass"" , to
""help""
with a 250hz clock, but RG complains ever.)
I had this error with Rosegarden and rebuilt my kernel with HZ=1000.
Rosegarden still complains. What could I be doing wrong? uname -a indicates I am running the newly built
kernel, and I've checked
my .config to prove I saved the setting. Maybe there is a way to query the
running kernel for the value of HZ?
cat /proc/asound/timers ?
here is : cat /proc/sys/kernel/osrelease
2.6.17-rt8
(gcc 4.1.1, xorg 7.1, nvidia blob, RT configs, all ok)
note : i am new on the list, but i love archives :)
2:21 p.m.
bubar said:
Yes, certain.
You reminded me. I did do that, it says 1000.
I had this
error with Rosegarden and rebuilt my kernel with HZ=1000.
Rosegarden still complains. What could I be doing wrong?
are you sure you are in
audio group ? and second, forget to turn off the hpet kernel option
?
Never heard of that, I'll look it up.
finally, on which kernel ? (in 2.6.17, the Mr Gleixnar
& Mr Molnar clock
time
patch make clock near one nanosecond, and add the tickless stuff, too.)
http://marc.theaimsgroup.com/?l=linux-kernel&m=115064343409061&w=3
(note in RT patch from Molnar, there is another clock stuff i thing. So we
dont need this one)
From gentoo pro-audio overlay, rt-sources 2.6.16-29-rt
uname -a
indicates I am running the newly built kernel, and I've checked
my .config to prove I saved the setting. Maybe there is a way to query
the
running kernel for the value of HZ?
cat /proc/asound/timers ? here is : cat /proc/sys/kernel/osrelease
2.6.17-rt8
(gcc 4.1.1, xorg 7.1, nvidia blob, RT configs, all ok)
note : i am new on the list, but i love archives :)
Not at my computer just now... I am thinking this might be a rosegarden
problem and not a kernel problem.
--
Michael Pacey
2:36 p.m.
Le lundi 7 août 2006 18:14, vous avez écrit :
bubar said:
Yes, certain.
You reminded me. I did do that, it says 1000.
yes it is very possible !
here is RoseGarden R4 v1.2.3 (and complain on 250hz, dont complain on 1000hz)
regards
yvan
I had
this error with Rosegarden and rebuilt my kernel with HZ=1000.
Rosegarden still complains. What could I be doing wrong?
are you sure you are in audio group ? and second, forget to turn off the hpet kernel
option ?
Never heard of that, I'll look it up.
finally, on which kernel ? (in 2.6.17, the Mr
Gleixnar & Mr Molnar clock
time
patch make clock near one nanosecond, and add the tickless stuff, too.)
http://marc.theaimsgroup.com/?l=linux-kernel&m=115064343409061&w=3
(note in RT patch from Molnar, there is another clock stuff i thing. So
we dont need this one)
From gentoo pro-audio overlay, rt-sources 2.6.16-29-rt
uname -a
indicates I am running the newly built kernel, and I've checked
my .config to prove I saved the setting. Maybe there is a way to query
the
running kernel for the value of HZ?
cat /proc/asound/timers ? here is : cat /proc/sys/kernel/osrelease
2.6.17-rt8
(gcc 4.1.1, xorg 7.1, nvidia blob, RT configs, all ok)
note : i am new on the list, but i love archives :)
Not at my computer just now... I am thinking this might be a rosegarden
problem and not a kernel problem. 
7:25 a.m.
Hallo,
Atte André Jensen hat gesagt: // Atte André Jensen wrote:
I just installed xubuntu 6.06 on my T41 laptop. When I
start jack like
this: "jackstart -R -d alsa -p 64" I get:
jackstart: cannot get realtime capabilities, current capabilities are:
=ep cap_setpcap-e
probably running under a kernel with capabilities disabled,
a suitable kernel would have printed something like "=eip"
This is both with the stock kernel (2.6.15) and a 2.6.17 patched with
http://people.redhat.com/mingo/realtime-preempt/
I think, nobody is using jackstart anymore. Did you try "jackd"
directly? Do you have the realtime-lsm-module installed or better yet:
Are you running a Rlimits-aware PAM as described here:
http://ubuntustudio.com/wiki/index.php/Breezy:Rlimits-Aware_PAM
Ciao
--
Frank Barknecht _ ______footils.org_ __goto10.org__
8:27 a.m.
yes !
simple ! jackstart i dont read that, sorry
use jackd -R (...)
I think, nobody is using jackstart anymore. Did you
try "jackd"
directly?
Do you have the realtime-lsm-module installed
lsm with hard realtime from Sir Ingo
Molnar patch ??
or better yet:
Are you running a Rlimits-aware PAM as described here: .com
Rlimits ?? again
avalaible on ubuntu ?
have fun
(other thing : dont forget to use 1024 in /proc/sys/dev/rtc/max-user-freq at
boot time to have a complete configuration, maybe)
8:59 a.m.
Hallo,
bubar hat gesagt: // bubar wrote:
AFAIK it's available, but I don't run Ubuntu. Anyway Ubuntustudio
provides libpam packages on the URL I mentioned that work fine on
Debian as well.
Ciao
--
Frank Barknecht _ ______footils.org_ __goto10.org__
yes !
simple ! jackstart i dont read that, sorry
use jackd -R (...)
I don't use any Ingo Molnar realtime patch. Stock kernels are good
enough now for most uses latency-wise, IMO.
I think, nobody is using jackstart anymore. Did
you try "jackd"
directly?
Do you have the realtime-lsm-module installed
lsm with hard realtime from Sir
Ingo Molnar patch ?? or better yet:
Are you running a Rlimits-aware PAM as described here: .com
Rlimits ?? again
avalaible on ubuntu ?
10:25 a.m.
Le lundi 7 août 2006 12:59, Frank Barknecht a écrit :
Hallo,
Hallo :)
I don't use any Ingo Molnar realtime patch. Stock
kernels are good
enough now for most uses latency-wise, IMO.
yes
(but i prefer a complete hard real time linux kernel, with posix_cpu_timer in
RT and rtnetlink, and watchdog_for_rt off course -another story ;) - )
note : a part of Sir Molnar patch will be integrated near future in stock
kernel.
11:22 a.m.
Frank Barknecht wrote:
I don't use any Ingo Molnar realtime patch. Stock
kernels are good
enough now for most uses latency-wise, IMO.
How do you go about changing the clock=250 limitation mentioned? Or do
you don't think it's audible (or live with it)?
--
peace, love & harmony
Atte
9:13 a.m.
Frank Barknecht wrote:
I think, nobody is using jackstart anymore. Did you
try "jackd"
No, but that + the PAM below seems to work..
Are you running a Rlimits-aware PAM as described
here:
http://ubuntustudio.com/wiki/index.php/Breezy:Rlimits-Aware_PAM
Now I am, thanks. Now
Now jackd doesn't complain about capabilities. However even starting it
with very conservative settings (jackd -R -d alsa) I get stuff like this
when openning programs (tried hydrogen and rosegarden):
delay of 20915.000 usecs exceeds estimated spare time of 20815.000;
restart ...
The messageges are not generated once the programs are started, and when
they appear the programs seems (and sounds) fine. Should I simply ignore
these messages?
--
peace, love & harmony
Atte
5:36 p.m.
Frank Barknecht wrote:
Are you running a Rlimits-aware PAM as described
here:
http://ubuntustudio.com/wiki/index.php/Breezy:Rlimits-Aware_PAM
It turns out that 1) installing the above (breezy package) on dapper
will break packages depending on newer versions of pam and 2) the
package in dapper is already good enough. So basically I had to (after
undoing the above):
echo @audio - rtprio 99 >> /etc/security/limits.conf
echo @audio - memlock 250000 >> /etc/security/limits.conf
echo @audio - nice -10 >> /etc/security/limits.conf
See:
http://ubuntustudio.com/wiki/index.php/Dapper:Studio_Preparation#Real-Time_…
--
peace, love & harmony
Atte
11 Aug
11 Aug
3:46 a.m.
On Mon, 2006-08-07 at 21:36 +0200, Atte André Jensen wrote:
Frank Barknecht wrote:
No one said to install Breezy packages on Dapper. If you are running
Dapper and want to follow anything in the wiki, please stay in the
Dapper pages and not the Breezy pages. I don't update the Breezy pages
anymore, and um, the Dapper pages are there for Dapper (as you might
suspect).
Are you running a Rlimits-aware PAM as described
here:
http://ubuntustudio.com/wiki/index.php/Breezy:Rlimits-Aware_PAM
It turns out that 1) installing the above (breezy package) on dapper
will break packages depending on newer versions of pam and 2) the
package in dapper is already good enough. So basically I had to (after
undoing the above):
echo @audio - rtprio 99 >> /etc/security/limits.conf
echo @audio - memlock 250000 >> /etc/security/limits.conf
echo @audio - nice -10 >> /etc/security/limits.conf
See:
http://ubuntustudio.com/wiki/index.php/Dapper:Studio_Preparation#Real-Time_…
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20 comments
8 participants
participants (8)
-
Atte André Jensen -
Bill Allen -
bubar -
Dana Olson -
Dave Phillips -
Frank Barknecht -
Lee Revell -
Michael Pacey